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Mac Pro Late 2013 CPU Replacement

O que você precisa

  1. Mac Pro Late 2013 CPU Replacement, Outer Case: passo 1, imagem 1 %32 Mac Pro Late 2013 CPU Replacement, Outer Case: passo 1, imagem 2 %32
    • Slide the lock switch to the right, to the unlocked position.

  2. Mac Pro Late 2013 CPU Replacement: passo 2, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 2, imagem 2 %32 Mac Pro Late 2013 CPU Replacement: passo 2, imagem 3 %32
    • Lift the outer case straight up off the Mac Pro.

    • It may help to push down on the center of the fan while lifting the case up.

  3. Mac Pro Late 2013 CPU Replacement, Fan Assembly: passo 3, imagem 1 %32 Mac Pro Late 2013 CPU Replacement, Fan Assembly: passo 3, imagem 2 %32 Mac Pro Late 2013 CPU Replacement, Fan Assembly: passo 3, imagem 3 %32
    • Remove five 5.1 mm T10 Torx screws from around the outer perimeter of the fan assembly.

    You don't have to remove the fan assy to get to the wifi board & card. It can be done with the fan assy still attached.

    Fat Mango - Responder

    Fat Mango is correct. That said. If you do pull the fan assembly note that the screws are all held in with blue Permatex and breaking them free takes a fair amount of effort. Getting a good set of Torx screwdrivers is a must.

    Jim WIlson - Responder

    Hey guys, what would happen if you only replace one card.. I have a D300 but the plan is to upgrade to D500 or D600. So If I can afford and install one instead of the pair would it increase something? or will it cause any conflict? I guess I don’t understand if I the Mac Pro has 2 D300 graphic cards that means each has 1GB? Same as If I would Install 1 D600 that would increase 3GB only? Thanks.

    marcotamayo - Responder

    D300 = 2GB each card. Very few apps uses two cards at the same time.

    Gio Cas -

    The (5) Screws are Apple part number 923-0713

    Steven Gier - Responder

  4. Mac Pro Late 2013 CPU Replacement: passo 4, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 4, imagem 2 %32
    • The fan assembly is attached to the rest of the computer by two cables on the IO board side.

    • Tilt the assembly up away from the IO board.

    • Do not try to remove the fan assembly yet, as it is still attached by two cables.

  5. Mac Pro Late 2013 CPU Replacement: passo 5, imagem 1 %32
    • While supporting the fan assembly with one hand, loosen the two T8 captive screws in the fan cable bracket.

    • These screws are captive in the Mac Pro. Do not try to remove these screws from your Mac Pro.

    On my Mac Pro (assembled mid-2017) these are T8 screws. In fact, there were no T7 screws anywhere in my machine.

    mark33 - Responder

    There was no bracket on top of the cable at all, so I got a bit confused, so I had to skip step 5 and 6.

    Rakesh - Responder

    On my machine, a TR7 worked to remove them due to the weird angle.

    Wilson Gaberino - Responder

  6. Mac Pro Late 2013 CPU Replacement: passo 6, imagem 1 %32
    • Use a pair of tweezers to pull the fan cable bracket away from the fan assembly.

  7. Mac Pro Late 2013 CPU Replacement: passo 7, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 7, imagem 2 %32
    • Use the flat end of a spudger to disconnect the fan assembly ribbon cable from the IO board.

  8. Mac Pro Late 2013 CPU Replacement: passo 8, imagem 1 %32
    • Disconnect the fan assembly antenna cable from the IO board.

    • Remove the fan assembly from the Mac Pro.

    You don't have to remove the fan assy to do the steps below. They can be done with the fan assy still attached.

    Fat Mango - Responder

  9. Mac Pro Late 2013 CPU Replacement, Lower Case: passo 9, imagem 1 %32 Mac Pro Late 2013 CPU Replacement, Lower Case: passo 9, imagem 2 %32 Mac Pro Late 2013 CPU Replacement, Lower Case: passo 9, imagem 3 %32
    • Flip the Mac Pro upside down, 180 degrees.

    • Remove five 5.1 mm T10 Torx screws from the outer perimeter of the lower case.

  10. Mac Pro Late 2013 CPU Replacement: passo 10, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 10, imagem 2 %32
    • Carefully lift the lower case up and remove it from the Mac Pro.

  11. Mac Pro Late 2013 CPU Replacement, Interconnect Board: passo 11, imagem 1 %32 Mac Pro Late 2013 CPU Replacement, Interconnect Board: passo 11, imagem 2 %32
    • Use the flat end of a spudger and a twisting motion to gently separate one side of the graphics card data connection.

  12. Mac Pro Late 2013 CPU Replacement: passo 12, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 12, imagem 2 %32 Mac Pro Late 2013 CPU Replacement: passo 12, imagem 3 %32
    • Gently separate the other side as well.

    • Flip the connector up and out of the way of the graphics card.

    • Repeat this procedure on the other graphics card.

  13. Mac Pro Late 2013 CPU Replacement: passo 13, imagem 1 %32
    • Remove the two 6.0 mm T8 Torx screws securing the interconnect board to the heat sink.

    These are actually 6.0mm T8 Torx Screws. 12/07/2016.

    Todd - Responder

    Ended up being T9 screws for me.

    Nathaniel Wilson - Responder

    On my Mac Pro (assembled mid-2017) these are T8 screws. In fact, there were no T7 screws anywhere in my machine.

    mark33 - Responder

    These are T8 screws in my 2013 Mac Pro.

    Sangers - Responder

    T8 screws for me, i did and edit to this step

    Steve McGinn - Responder

    Ended up being T15 screws on my machine

    Spencer Curtis - Responder

  14. Mac Pro Late 2013 CPU Replacement: passo 14, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 14, imagem 2 %32 Mac Pro Late 2013 CPU Replacement: passo 14, imagem 3 %32
    • Gently walk the interconnect board straight up off the logic board's slot connection.

    • It is recommended to lift one side and then the other.

    • Do not try to remove the interconnect board from the Mac Pro yet, as it is still connected to the IO board.

  15. Mac Pro Late 2013 CPU Replacement: passo 15, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 15, imagem 2 %32
    • Flip the interconnect board up and over, exposing the IO board data cable.

    • Use the same sort of twisting and spreading motion with the flat end of a spudger to separate one side of the IO board data cable.

  16. Mac Pro Late 2013 CPU Replacement: passo 16, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 16, imagem 2 %32
    • Use the flat end of a spudger to separate the other side of the IO board data cable.

    • Bend the cable out of the way and remove the interconnect board from the Mac Pro.

  17. Mac Pro Late 2013 CPU Replacement, Power Supply Assembly: passo 17, imagem 1 %32
    • Flip the Mac Pro back over and set it gently on a flat surface.

    • We recommend laying the Mac Pro on the corner of the heat sink and the two standoff screw posts that attach to the interconnect board.

  18. Mac Pro Late 2013 CPU Replacement: passo 18, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 18, imagem 2 %32
    • Remove the two 3.6 mm T5 Torx screws from the sides of the power supply cage (one on each side).

    those are t4 screws in my mac

    Andrzej Kiryluk - Responder

    T4s on mine, as well

    rwcinmsp - Responder

  19. Mac Pro Late 2013 CPU Replacement: passo 19, imagem 1 %32
    • Remove the power supply cage from the top of the power supply.

    • By removing this cage, you are exposing internal components of the power supply. Be very careful not to touch any of the power supply components or circuitry.

    • Be careful not to drop any screws or tools into the power supply, as this may damage the power supply.

  20. Mac Pro Late 2013 CPU Replacement: passo 20, imagem 1 %32
    • Remove the four 5.5 mm T8 Torx screws securing the power supply assembly to the Mac Pro.

  21. Mac Pro Late 2013 CPU Replacement: passo 21, imagem 1 %32
    • Remove the power supply assembly from the Mac Pro.

  22. Mac Pro Late 2013 CPU Replacement, Logic Board: passo 22, imagem 1 %32
    • Remove two 5.5 mm T8 Torx screws.

    Il est possible de les retirer aussi des le début une fois le “fond” rond du Mac pro retiré

    Chris - Responder

    Step 22 when reassembling, it helps not to fully tighten until you put the screws in from step 20.

    Mike Sheedy - Responder

  23. Mac Pro Late 2013 CPU Replacement: passo 23, imagem 1 %32
    • Remove four 12.8 mm T10 Torx screws from the CPU heat sink bracket.

    • Remove only the outer four of the eight screws.

    I cannot unscrew one of those because I appears that one of the elements in wich it is screwd underneath is loose and moving along with the screw, making this operation impossible. Anyone had this issue ?? Any solution ??

    benjaminmonnoyeur - Responder

    I had the same problem. These screws go into threaded inserts, which in turn are screwed into the heatsink. Both have threadlocker compound applied. So the threaded insert’s threadlocker gives up first, and the threaded insert unscrews from the heatsink. Remove all 4 screws, then with a pair of needle nose pliers, hemostat, or thin 7mm wrench, hold the insert steady and unscrew the screw from it.

    Chuck Fry - Responder

    Could I remove these screws and re-screw? I worry that remove them but I can’t re-use them?

    timmy123 -

    I had that problem, too, and I did it like Chuck Fry, with a thin wrench. Unfortunately one threaded insert was so tight that I slipped and a capacitor broke off. Can someone tell me what kind of capacitor I need? I can't find anything under the name listed above the capacitor. Thank you.

    Steph - Responder

    A way to avoid this situation is to ease the tension on the spring slowly and rotate the loosening of four screws a few turns at a time – when the tension is released equally the threaded inserts are more likely to stay in place.

    Steve Esser - Responder

    I had 2 of those double sided screws stuck like that. I carefully removed them from the motherboard using a small vice grip to hold one side, and a torx on the other. Then reinstalled them using locktite compound. Make sure the heat sink is flush to the motherboard in the same way that you found it, or the assembly will not fit back in the case correctly, indicating the CPU may not be securely attached. The result may be that you think you killed your mac when you turn in on again and just hear the fan spinning like crazy but no chime or boot sequence. If that happens, go back in, reset the double sided screws, and make sure the heatsink is flush. Worked for me.

    Sili_pepper - Responder

  24. Mac Pro Late 2013 CPU Replacement: passo 24, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 24, imagem 2 %32
    • At this point, the logic board is held onto the heat sink by thermal compound.

    • You may need to gently pry with a spudger to separate the logic board from the heat sink.

    • Be very careful not to bend and break the logic board.

    • Remove the logic board from the heat sink.

  25. Mac Pro Late 2013 CPU Replacement: passo 25, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 25, imagem 2 %32
    • Remove the inner four 12.8 mm T10 Torx screws from the CPU heat sink bracket.

    • Remove the CPU heat sink bracket.

    On my Mac Pro (assembled mid-2017) these screws are covered with a black sticker presumably to indicate tampering. If you did not know they were screws it would not be obvious. You have to just put the T10 driver right in the center and start turning; it quickly breaks through the sticker.

    mark33 - Responder

    Oh man. Thanks so much for that comment! I would have tried to use pliers!

    Trevor Standley - Responder

    Also remember to support the CPU (On the other side) while removing these screws. Mine CPU fell out from the other side while loosening.

    Daniel Wood - Responder

    On my MacPro there are no screws here. On the backside the place where the back of the screws should be are covered with stickers, but removing the stickers simply reveals a rivet. There’s no screw and seemingly no way to remove the CPU.

    rsproductions - Responder

    Je confirme, un sceau plastique noir protège les 4 vis. Il faut percer et dévisser au centre avec t9 pour moi

    Chris - Responder

    Wow, glad I clicked comments. I had no clue about the sticker. I was about to use some kind of something to get them out 😂

    Marc Kinnear - Responder

  26. Mac Pro Late 2013 CPU Replacement: passo 26, imagem 1 %32
    • Remove the second heat sink bracket.

  27. Mac Pro Late 2013 CPU Replacement: passo 27, imagem 1 %32 Mac Pro Late 2013 CPU Replacement: passo 27, imagem 2 %32
    • Lift and remove the logic board from the CPU and bracket.

    • During reassembly, be sure to clean off and replace the thermal compound on the CPU.

    • We have a thermal paste guide that makes replacing the thermal compound easy.

    There is one import piece of information when replacing or upgrading these processors. There are two possible orientations and only one is correct (correct me if I’m wrong!). There’s a small arrow on one corner of the processor that needs to be aligned to the correct side. Just match the orientation of the original processor - this can be difficult or easy to overlook since the tiny alignment arrow is usually covered with thermal paste. Clean the Thermal paste off the old processor before you remove it to see the correct alignment.

    Steve Esser - Responder

  28. Mac Pro Late 2013 CPU Replacement, CPU: passo 28, imagem 1 %32
    • Remove the CPU from the CPU bracket.

    • CPU remains.

    • During reassembly, be sure to clean off and replace the thermal compound on the CPU.

    • We have a thermal paste guide that makes replacing the thermal compound easy.

    The trickiest part of reassembly was attaching the CPU heat sink bracket. Some instructions for that might help. Quite a lot of force on the bracket is needed to get the screws in, due to the spring-loaded nature of the bracket.

    mark33 - Responder

    Excellent guide. I upgraded my 6-core CPU to 12-core and it works really fine.

    Detaching the CPU didn’t work out initially due to the screws… and finally the re-assembling of the sink bracket is a bit more complicated than it is explained here, but it was an excellent guide anyways.

    Thanks!

    Carlos Larrañaga Loreto - Responder

    Excellent guide, thank you. Swapped out the CPU from 6 to 12 core. Need to remember the correct way round for the new CPU in the socket and as others have commented putting the screws back into the CPU brackets can be a little fiddly/worrying all in one.

    Julian Lewis Booth - Responder

    I just completed this task today, took just under 1.5 hours(forgot to reinstall 2nd heatsink bracket. The spring loaded plate is tough to get the first 2 screws in, but after that it is easy. instructions are clear and concise, I also have serviced these machines before a few years ago, went to leave the outer cover off, powered on but nothing, soon discovered the cover must be installed, was happy when it powered up booted to macOS and verified cpu specs, installed the 3.0GHz 10 core from the 6 core 3.5GHz cpu.

    Greg - Responder

    This was my second Mac Pro I replaced the CPU. After doing it the 2nd time it wasn’t as difficult. It took just a little under and hour and I took my time.

    Jack - Responder

Conclusão

To reassemble your device, follow these instructions in reverse order.

82 outras pessoas executaram este guia.

45 comentários

So this means I can buy the smallest Mac Pro now and upgrade the CPU in a few years, right? I like you guys! :)

Ben - Responder

Yes, Ben, you could. 2nd hand CpU's are available on eBay, Amazon and various companies. Review suitability of your proposed CPU that it will fit the socket FCLGA2011, and pay attention to voltage. ECC support, and TDP. Switching CPU isn't an easy task and it has risks replacing it.

aramis -

Hi Ben, I found an interesting website with more info regarding CPU upgrade:

https://blog.macsales.com/22230-owcs-mac...

from

http://www.xlr8yourmac.com/archives/dec1...

aramis -

I just replaced the cheapest 4-core version with the 12 core 2697v2.

This saved me around $700 + i can sell the 4 core.

Christer Jonsson - Responder

Can you please provide some benchmarks, i wish to do the same, but need to see if doing this myself creates any problems

Habib Kalia -

How much did it cost for the new CPU? How much did you get for the old one?

John Cathey -

Just replace it? No need to change bios?

vader0401 -

I didn't need to change anything, no update required: booted into OS X and the CPU was detected.

aramis -

Can / Could I also use an E7?

Peter Reif - Responder

Pete, here are a few places to look for an E7 CPU to see if it will fit/work in the Mac Pro late 2013 with the FCLGA2011 socket. Check for voltage, ECC support and TDP (base 130 watts for default CPU's) and other specs: http://www.cpu-world.com/Compare/index.h... and search for socket 2011 compatibility. Also, check http://ark.intel.com/search/advanced?s=t... , this is Intel's database for its products; it appears only the E7v2 and E7v3 may fit the board. Do your homework and find a suitable CPU. This way I found that my replacement E5-2687Wv2 would work.

aramis -

STEP 23

I can not remove the screws . A screw is changed shape ....

What can I do ? Any help?. I am going wrong .. Thanks so much...!

acabanillas00 - Responder

i had the same issue ! Very strange. I wonder why tho ! Is it because of apple warranty or juste a random issue. I’m gonna have my unit check by some pros …

benjaminmonnoyeur -

Got it down to the cpu bracket and I'm now confronted with 4 screws that are round and have no space for a screwdriver. Does anybody have experience with this??? What a nightmare!!!

Jesse Billson - Responder

Jesse Billson and acabanillas00, you've run into Apple's new tamper-evident screw stickers. Before you proceed, please note that removing these screws will leave behind clear evidence to Apple that you've been inside the computer, leaving you no wiggle room on your warranty. To remove the screws, first press down with the T10 screwdriver around the centers of the circles, where you would expect the holes to be, and you'll tear right through the stickers (you may have to blindly rotate the screwdriver a bit to get it to line up correctly, since the stickers conceal the holes). Then, just unscrew as normal.

A couple more notes: new Mac Pro 2013's started shipping with these CPU screw stickers some time in 2015, and if you take an older Mac Pro 2013 in for repair, Apple will quietly add the stickers if, during the repair process, they end up stripping the computer down to the CPU bracket.

I haven't found a satisfactory method for preserving the stickers, nor a replacement, but I imagine it could be done...

davidmatics -

An added note: When reinstalling the CPU riser board, Apple sets the torque of the screws to 10.5lbs/in. This might effect the heat transfer capabilities, or performance of the processor itself.

Shmajay - Responder

Completed E5-1650v2 (default 6-core 3.5GHz CPU) upgrade to an E5-2687Wv2 8-core 3.4GHz CPU. Scariest job done ever. Geekbench 4 results Mono/Multi Core: E5-1650v2 (default CPU) 3688/15900 with loads of OS X stuff running in the background, E5-1650v2 (default CPU) 3901/17425 after switching off background processes, then E5-2687Wv2 (upgraded CPU) 3989/22447 with loads of OS X stuff running in the background. Comments on the process above: check your bit size prior to applying your driver, as I found just a few screws having a different bit size than explained above (too small i.e. 5 vs 7, or 8). Also, power supply assembly is hard to put back into place as was before: it's all a very tight fit! Don't force, simply retry fitting if it doesn't fit the first time. Extra information: after original CPU removed, it's a bit tricky to get the new CPU in place as you'll be putting the motherboard on TOP of the CPU according to the process above. Hope this helps.

aramis - Responder

Swapped a E5-2667 V2 into a base quad-core 1620. Considerably faster on multicore tasks. ;)

Not difficult at all - take your time and have some sort of organizer for the various screws you remove. And a torque wrench is a good thing to use so you don’t under- or over-tighten anything.

Bob - Responder

Thanks much for this guide. I just completed installation of an E5-2697v2 (the same 12-core CPU that Apple ships) that I purchased off eBay for $550. I found a few things that were not quite accurate and left notes above in the relevant steps. Basically, both places that claim that the screws are T7 were actually T8 in my machine (apparently assembled in mid-2017 due to the fact that it came with Sierra 10.12.6 installed). Also, as a previous comment noted, my machine also had tamper-evident screws holding the CPU heat sink bracket (step 25). The T10 driver makes short work of the stickers. By far the trickiest part of the reassembly was installing the CPU heat sink bracket. After starting screws on one side of it, it takes considerable force to bend it down enough to get the screws on the other side started. And it’s hard because at the same time you have to keep the CPU from falling out on the opposite side. Really not too hard. Just get a nice work area with plenty of light and keep track of your screws.

mark33 - Responder

Just achieved this, swapping the built-in 4 Cores for a 2d hand E5-2690v2 3GHz 10 core, bought on eBay for 370€ (add 10% for $). Definitely worth the price : multi core geekbench increased from 10600 to 22400 !! Definitely don’t recommend the 2697 which is twice the price for only 10% more power above the 2690

Thanks for the guide !

Just a note : the 2 bottom screws were T8 on mine aswell.

Vincent Monteil - Responder

please help me

bronxbcn -

Hello, this is a little off topic, but was wondering if anyone has figured out how to run the Mac Pro 2013 with the cylinder shell removed? I want to do some bench testing with it off.

Mike S - Responder

Hello please . Can anybody help me? e bought an E5-2690v2 for my mac pro 6.1 all the perfect change but when it takes a long time of stress working with 4k it shuts down and throws me an error. I do not know what to do I'm desperate I bought it instead of the 2697 for the many comments and for the money I had available now I'm very disappointed I can not find a solution and changed the processor 4 times to discard more components but with the serial 1620 there are no errors but it is much slower please help me :) sorry my english use translator I only speak spanish. thanks greetings

bronxbcn - Responder

Awesome instructions. Took all of 45 mins

ericgoodfellow - Responder

I just installed a E5-2697v2 replacing the 3.7 Quad. What a difference! I’m very pleased. Concerning iFixit’s ‘Difficult” rating I would say it was a breeze for me. I took my time, about 1:45 hours and really found nothing difficult. If your’e handy and careful, it will be fine. I had one slight issue the arose from the stud on the processor chassis came out instead of the screw. I used a 7mm open end wrench to remove from the screw and reattached to the plate. I paid $280 for the 12 core and was well worth it!

[deleted] - Responder

Hello. I’ve been trying to get this upgrade to work for a few days. I end up with a system where the fan is running full speed and a “kernel task” is taking up almost all of the CPU. After reading about the CPU and kernel task it seems as though this is a way for the CPU to protect itself. A throttle so to speak. Everything was running well until the upgrade and even a subsequent downgrade back to the original CPU picks up the same issues. I’ve tries PRAM resets and SMC resets. Neither change the CPU/kernel task issue. Is there a missing step? Some sort of reset that needs to be done?

josh townsend - Responder

Additionally, I’ve gone the the trouble of replacing the CMOS battery as well. Still no change.

josh townsend -

Apple Diagnostics show Reference Code PFM006 and Reference Code PPN001 — Both of which say “There may be an issue with your power management controller (SMC)”

Following Apples posted instructions for SMC reset doesn’t do anything.

josh townsend -

Another thing I’ve noticed is that PRAM “zapping” doesn’t work nor do simple things like software reboot or shutdown. As if the SMC really isn’t able to do what it is supposed to do. When I do a restart the system will either shutdown (and not reboot) or just flip back to the login screen. Also when you power on then hold the Command - Option - “P” & “R” keys it just shuts down but not reboot.

A run-down of things I’ve tried.

Environment - At the start.

2 Mac Pro 2013s

1 - 4 core 3.7MHZ, 2 TB SSD (Feather M13-S SSD) 128 GB RAM

1 - 4 core 3.7MHZ, 256 GB SSD (Factory OEM) 12 GB RAM

Both were working just fine prior to CPU upgrade attempt

After CPU upgrade the following symptoms:

Fan running at full speed. (using a fan control program is not a good option - see below)

Kernel Task taking up all of the CPU resulting in super slow response.

After Downgrade back to factory CPUs the same issues persist.

josh townsend -

Have tried the following:

Down grade CPU (no change)

Reset SMC (the apple way and also the rEFIt/rERInd way)

PRAM reset

Several attempts at different amounts of thermal paste

Several different CPU bracket tightnesses- less tight and the way it comes from the factory (bracket arms all the way to the logic board). *** in the OWC video method, you will have trouble replacing the PowerSupply unit because the CPU bracket screws will be too high. There seems to be some disagreement about what is either even possible or recommended based on the they original state)

josh townsend -

Clean OS install from both High Sierra and Mojave

Set and reset all cables and connectors

Found a “button on the control board" (not documented but very near the SMC chip) see attached picture (purple circle) *not documented in the public sphere. — nothing seemed any different after pressing it and or pressing it and holding it.

Current State - Both Mac Pros (one with the 12 core cpu and one with the factory 4 core) boot but are severely CPU throttled and fan running at full speed. Neither are really usable. There must be something missing that this would happen across two nearly identical computers.

Ran Apple Diagnostics results with the following errors - Reference Code PFM006 and Reference Code PPN001 — Both of which say “There may be an issue with your power management controller (SMC)

Any and all help really appreciated.

josh townsend -

Hi John, The kernel_task was the symptom I have. I was told the issue is the thermal conductive paste on the heatsinks is old and must be replaced. How to Apply Thermal Paste

Michael Glenn Williams -

hey josh, have you found a solution for your problem? I’ve changed my cpu and am running into the same issues.. did all the resets, checked all the cables but to no avail.

hans ueli -

Same here, have you check both GPU are available?

Riccardo -

I’ve done a number of these - going from 4 or 6 core up to 12 core. Straightforward thanks to this guide.

Makes the 6,1 a more attractive unit to me as you can buy one inexpensively and then update the storage (2 TB Intel 660p most recently) and the CPU (E5-2697v2 was $180 on eBay), and RAM (if necessary). I’d go for a D500 unit - the D700 and D300 models seem to have the most issues.

Bob - Responder

Thank you for your instruction, I replaced 4-core version with 12-core E5 2697 v2, SSD from 256GB to 1TB with Kingston A2000 series, DRAM from 12GB to 64GB.

jenshenghsu - Responder

followed the instructions carefully. after putting everything back together, the computer won’t turn on. just the light around the plugs turns on. other then that, no fan no nothing.

any ideas what the problem is?

Niels - Responder

I have the same problem

hold1119 -

Hi dears

i change mine Mac cpu to the E5-2697.

and then it can be switch on. After I change back the factory one. It is not working anymore.

Can u help me solve out the problem???

Rice

hold1119@gmail.com

hold1119 - Responder

Hey, did u get an answer on your problem? or how did u fix it?

thanks!

niels@sinne.org

Niels -

Hi there,

pardon me for the ‘easy’ question but…

Is correct if I remember a double processor unit?

If yes the logic board is the same for one and two sockets or are two different models?

Thanks a lot,

Fabio

Fabio Braga - Responder

Thank you for the guide. Just successfully upgraded from 6-core (Xeon E5-1650 v2) to a 12-core (Xeon E5-2697 v2). According to Arctic silver, the Xeon E5 uses the "vertical line" method for the thermal paste though I ended up doing the spread instead (like in the OWC youtube video) and not seeing any issues.

Regarding the performance difference, according to Geekbench 5 scores (best scores out of 22 runs):

6-Core

Single-Core=869

Multi-Core=4784

12-core (vs. 6-core)

Single-Core=797 (-8%)

Multi-Core=7296 (+33%)

I was surprised how little single-core performance was lost while gaining so much on the multi-core side.

Chris Smith - Responder

I have upgraded a 4-core Mac Pro 2013 to a 12-core CPU. Not too difficult. I advise doing this to old Mac Pros because the thermal paste needs to be replaced occasionally. One option is to replace the 4-core 3.7 GHz Xeon E5 with the 3.7 GHz 6-core Xeon E5. This CPU was never used by Apple but is now available on eBay for about $100. Two extra cores and maximum possible speed in single-core applications!

Filippo Neri - Responder

Gulp. Got all the way to the inside, but then the final four internal screws holding the CPU (step 23) have solid caps! No Torque screw hole in them! What the heck! Has anyone seen this? And if so, how the heck do you remove those?

Greg Fay - Responder

Saw this above! Yay!

you've run into Apple's new tamper-evident screw stickers. Before you proceed, please note that removing these screws will leave behind clear evidence to Apple that you've been inside the computer, leaving you no wiggle room on your warranty. To remove the screws, first press down with the T10 screwdriver around the centers of the circles, where you would expect the holes to be, and you'll tear right through the stickers (you may have to blindly rotate the screwdriver a bit to get it to line up correctly, since the stickers conceal the holes). Then, just unscrew as normal.

A couple more notes: new Mac Pro 2013's started shipping with these CPU screw stickers some time in 2015, and if you take an older Mac Pro 2013 in for repair, Apple will quietly add the stickers if, during the repair process, they end up stripping the computer down to the CPU bracket.

I haven't found a satisfactory method for preserving the stickers, nor a replacement, but I imagine it could be done...

davidmatics - Aug 9,

Greg Fay -

anyone in the DC area want to do this replacement for me? I purchased the 12 core CPU but I am hesitant. I'll pay for the service. Let me know!

Bob pasap - Responder

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