PSU Fan Filter added, Replaced IOH with thermal and Went all out on cooling (PSU,CPU AND GPU DONE!)

Discussion in 'Mac Pro' started by p11hlf, Jan 6, 2019.

  1. p11hlf macrumors newbie

    p11hlf

    Joined:
    Jul 27, 2018
    Location:
    Southampton UK
    #1
    Hey Guys,

    Curious to know if my Xeon X5690 CPU was being cooled right I went to town on cooling today.

    For some reason, my PSU fan is running in the 800-900 range constantly..... so I started from the bottom of the case and will be working my way to the top. (backwards I know)

    before pulling it apart I bought the following.

    Innovation cooling graphite thermal pad - https://www.amazon.com/dp/B07CK9SHZG/ref=twister_B07CK7LG51?_encoding=UTF8&psc=1
    New thermal pad for the cooler
    https://www.amazon.com/Wathai-Condu...3&sr=8-2-spons&keywords=3mm+thermal+pad&psc=1

    Upon pulling it apart I found that the copper heat plate on the cooler had some very small pitting, and the thermal pad was covered in dust and was all squished down.

    I hit the copper with 1200 grit paper to give it a clean, just taking the top of the pitting off... it cleaned up quite quickly so it may have not been pitting but perhaps some very stubborn thermal grease..... but I could not even scratch it off with a blade so went down the sand paper route.

    I cleaned it all up, CPU included and fitted a new thermal pads on the cooler and the CPU.

    I used the graphite pad for ease of use, I had seen a few videos and reviews and it seems a way to go.

    I then installed Macs Fan Control by Crystal Idea.
    https://www.crystalidea.com/macs-fan-control/download

    This had worked on my previous machines well so I thought I would give it another crack here.
    As I had been lurking on the forums for a while I noticed that handheldgames has noticed that focusing the fans on the ram stick has made a big difference.

    CMP case cover and heat

    so I went at setting Mac Fan with the following settings.

    Intake/exhaust is based on DIMM2. 30c / 50c
    BoostA, based on CPU Diode 30c / 55c
    PS, based on PS1 34c / 45c

    All in all, my temps have dropped.... But with this many variables I can't say what exactly caused it.

    And my Mac is so much quieter mostly due to the reduced PSU fan speed.

    Whats next for me.

    • Put some fancy looking RAM coolers on the Samsung DIMMS (for this I need to buy another matching one)
    • Replace the Fan cable in my GPU cooler to a splitter off the cooler itself rather than the water pump.
    • Replace the GPU cooler fans to fancy Mag lev ones from corsair.
    • Clean out my PSU
    Why? because I want something to do in the winter.... Im bored!

    Thanks

    Phil
     

    Attached Files:

  2. p11hlf thread starter macrumors newbie

    p11hlf

    Joined:
    Jul 27, 2018
    Location:
    Southampton UK
    #2
    OK so a quick update on the CPU cooling situation.

    I've dropped 10% on average while gaming my CPU temps.

    From hovering around 60 degree c to 54 degree c

    All of my cables and fans arrived for the GPU today so I might give that a quick and dirty go this afternoon.

    Thanks for the likes!
     
  3. Alex Sanders74 macrumors regular

    Alex Sanders74

    Joined:
    Nov 26, 2013
    Location:
    Toronto, Canada
    #3
    Inheriting a 5,1 soon and it's great to read some tips from others on cooling. First plan is to clean everything when I get it and start with a clean slate. Appreciate you sharing these details.
     
  4. p11hlf thread starter macrumors newbie

    p11hlf

    Joined:
    Jul 27, 2018
    Location:
    Southampton UK
    #4
    Thanks Alex, its good to see some new 5,1 owners here.

    Ill update you all my my GPU cooling later today
     
  5. flehman macrumors 6502

    flehman

    Joined:
    Feb 21, 2015
    #5
    Which size of the graphite thermal pad did you get to fit the CPU - the 30x30 or the 40x40? I wonder if one of those thermal pads might be useful for the Northbridge chip as well if it could be cut to fit. And can you explain where the blue 100x100 silicone pad is going?
     
  6. p11hlf thread starter macrumors newbie

    p11hlf

    Joined:
    Jul 27, 2018
    Location:
    Southampton UK
    #6
    Hey Flehman,

    I bought the 40x40mm pad and it more than covered the CPU heat spreader.

    I reckon the graphite pad could work well for the Northbridge chip, as I see no reason why it couldn't be cut down.

    Lastly the silicone thermal pad was fitted on to the CPU town where it touches the CPU tray. Seen in the picture attached it replaces the old white putty like stuff that was all squished and dusty on my machine.

    IMG_0091.JPG IMG_0095.JPG IMG_0093.JPG
    --- Post Merged, Jan 8, 2019 ---
    Yesterday I changed the fans on my GTX 980 GPU's radiator.

    I have removed the PCI fan to make space for the push pull fan setup on the radiator.

    The radiator is currently just sitting in this position with a couple of rubber pads on the bottom it seems to be self sufficient....

    However I will probably make a bracket attached to the No.1 drive bay.

    I removed these fans

    https://www.amazon.com/Thermaltake-...-spons&keywords=thermaltake+riing+white&psc=1

    Which I had originally fitted over the EVGA single fan originally fitted, I chose these because they were pretty much the only 3 pin fan I could find of semi decent quality.

    They run at 1500rpm full speed, however when plugged directly into the GPU from the pump outlet they run at 56% constantly. so 840RPM

    I replaced them with 2 Corsair ML pro fans.

    https://www.amazon.com/Corsair-Prem...1546959651&sr=8-1&keywords=corsair+ml+pro+fan

    Which have a much larger range 400 to 2400RPM

    I also bought a cable for my graphics car enabling me to run these fans from the standard GPU fan plug.

    What does this mean?

    It means that when the GPU gets warmer, the fan get faster..... Meaning that my Mac Pro is quieter and cooler thanks to these new fans.


    Not really much to see in the pictures but hey!


    IMG_0096-1.JPG IMG_0097.JPG
     
  7. p11hlf thread starter macrumors newbie

    p11hlf

    Joined:
    Jul 27, 2018
    Location:
    Southampton UK
    #7
    HI All (again)

    today I decided to give the PSU a clean out.

    Who knows what was lying in there? do you know how dirty your PSU is?

    Here is a quick guide on removal, Not the same machine as mine but the screws were in the same place.

    https://www.ifixit.com/Guide/Mac+Pro+First+Generation+Power+Supply+Unit+Replacement/32222

    I also took apart my PSU ...... BE VERY CAREFUL

    I blew out quite a few dust bunnies from various heatsinks within the PSU itself.

    I also just ordered a magnetic 120mm fan filter.

    https://www.amazon.com/AIYUE-Magnet...&sr=8-1-spons&keywords=120mm+fan+filter&psc=1

    It will probably need modifying but the plate in front of the PSU fan is steel so it will stick right on.

     
  8. Alex Sanders74 macrumors regular

    Alex Sanders74

    Joined:
    Nov 26, 2013
    Location:
    Toronto, Canada
    #8
    Fan filter is a great idea. Curious to hear how they perform. I feel that the PSU on these towers is one of the weaker points as they age.
     
  9. p11hlf thread starter macrumors newbie

    p11hlf

    Joined:
    Jul 27, 2018
    Location:
    Southampton UK
    #9
    Hi all,

    Not my last update I promise you this now!

    But I fitted the fan filter, see the cuts and mods I had to do to achieve a fitment.

    It looks great..... should stop the dust bunnies from ever coming back also!

    IMG_0190.JPG
     

    Attached Files:

  10. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #10
    "I reckon the graphite pad could work well for the Northbridge chip, as I see no reason why it couldn't be cut down. "

    Not so sure it is a good idea. I was thinking also about this as I put it on my CPU's but the North bridge is much smaller... And the pad is conductive and it will cover elements on the board. Then it will insert electrical path due to conductivity .I reckon it should be cut only to the actual size.
     
  11. p11hlf thread starter macrumors newbie

    p11hlf

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    Jul 27, 2018
    Location:
    Southampton UK
    #11
    absolutely, I advise cutting it down....... in fact!

    Im doing it today!
     
  12. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #12
    I would like to know if there is any big temperature decrease after installing the pads in comparison to silver Arctic for example .
     
  13. W1SS macrumors 6502

    W1SS

    Joined:
    Aug 20, 2013
    #13
    Take extreme care when removing the plastic rivets. You don't want to damage neighboring ICs, specifically the tiny 6 pin mosfet chip.
     
  14. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #14
    I think this heat sink can benefit from using some sort of bolts/nuts springs type of tightening to increase the contact and reduce the temperature.
     
  15. W1SS macrumors 6502

    W1SS

    Joined:
    Aug 20, 2013
    #15
    From my experience using these pads, the heatsink's temp would increase by a couple of degrees to approx 54C ~ 56C while the Northbridge chipset would drop by several degrees to approx. 58C. Also, when idle or stressed, there should be a couple of degrees difference at the most between the heatsink and chipset versus 8C or more when using a thermal paste.

    The thing I liked most about these pads is their long lifetime and ease of application. They do however require medium to hard mounting pressure for effective heat transfer ie. not recommended for laptop heatsinks.
     
  16. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #16
    I know they work very well on my CPU's but there we apply pressure by torquing the bolts of the heatsink and the North bridge feels so loose in comparison . I read somewhere a guy who was selling upgraded CPU's to CPU trays sent to him was replacing those rivets with bolts and springs.
     
  17. p11hlf thread starter macrumors newbie

    p11hlf

    Joined:
    Jul 27, 2018
    Location:
    Southampton UK
    #17
    So that was easy. and it did go down the Nut and Bolt route.

    I used
    • M3 x 12 screws
    • M3 washers
    • M3 Nuts
    • Springs from the olde plastic clip.
    Some wise words about being careful removing the old plastic clips, there are indeed some sensitive chips around that area!

    I used a pair of tweezers to unhook one side of the clip and then carefully pushed the other side in with a small engineers flat head screw driver.

    I trimmed down the thermal pad to fit.... slightly oversized it actually to ensure I was covering it during installation but it quite clear from any other parts of the Northbridge setup.

    the old paste was plenty and looked not too bad in terms of contact, but was dry and crumbled away from both the heatsink and chipset.

    has it dropped loads of temps off at idle...... No! two or three degrees....

    There is 10 degrees between the heatsink and diode however? this seems like a bit too much so I might check it in a week or two if the gap doesn't close over time.

    IMG_0202.JPG IMG_0201.JPG IMG_0196.JPG IMG_0195.JPG IMG_0194.JPG IMG_0205.JPG IMG_0203.JPG IMG_0204.JPG IMG_0197.JPG IMG_0198.JPG

    IMG_0202.JPG
     
  18. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #18
    I think I used thermal grizzly or arctic silver 5 (thick layer) and I dropped the temperature difference to 6-8 deg C. The temperature differs between the single and dual CPU's quite a lot. On single CPU you can drop down to 56 C at idle whereas on dual 75 C seems the minimum. If you use Macs Fan Control you can drop it to 55-65 (dual CPU) C with little to minimum fan noise.
    --- Post Merged, Jan 21, 2019 ---
    I may try the bolts solution though to see the difference
     
  19. p11hlf thread starter macrumors newbie

    p11hlf

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    Jul 27, 2018
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    Southampton UK
    #19

    ok I'm at 50c with an ambient of 26c on idle on the single CPU board
     
  20. startergo macrumors 6502a

    startergo

    Joined:
    Sep 20, 2018
    #20
    that is pretty good. Though your ambient is pretty low. Mine is 30-31
     
  21. W1SS macrumors 6502

    W1SS

    Joined:
    Aug 20, 2013
    #21
    That's much better ... what about the temp difference between the diode and heatsink?

    By the way, that processor board needs some tlc.
     
  22. p11hlf thread starter macrumors newbie

    p11hlf

    Joined:
    Jul 27, 2018
    Location:
    Southampton UK
    #22
    yeah ill give it a clean soon!

    50c on the T diode
    39c on the Heatsink

    As I said above, ill leave it a week and maybe tighten the screws a bit more.
     
  23. Alex Sanders74 macrumors regular

    Alex Sanders74

    Joined:
    Nov 26, 2013
    Location:
    Toronto, Canada
    #23
    p11hlf. Following this thread and appreciate all the pics you’re posting. Planning to give the 5,1 that I’m getting tomorrow a through go over. Also, appreciate everyone else’s feedback. Great info here.
     
  24. thornslack macrumors 6502

    Joined:
    Nov 16, 2013
    #24
    In my reading on MR I thought the consensus was that Apple chose rivets for the north bridge in order to accommodate thermal expansion and contraction. Bolts would certainly prevent this sort of flexibility. That said, Pindelski and numerous others here have used rivets and I can’t say I’m familiar with any horror stories. But I also find it hard to believe the engineering team chose spring loaded fasteners for no reason.

    Either way, glad you’re enjoying your Mac Pro. I am a fan of screen filters but I am past investing anything else in my cMP personally.
     
  25. p11hlf thread starter macrumors newbie

    p11hlf

    Joined:
    Jul 27, 2018
    Location:
    Southampton UK
    #25
    This was the reason for using the original springs.... it does exactly the same heat expansion task as the plastic snap rivet.

    I replaced with screws for peace of mind, and was unsure that I would be able to get them off cleanly without breaking.


    Glad people are enjoying it here, worth doing the fan filter anyway as separating the PSU is a pain in the rear in comparison to giving the filter a quick wipe.
     

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