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Cooling Cooling a Ryzen 5900X and Crappy Motherboard (Was: Cooling a Ryzen 9 9950X... on air?)

Discussion in 'Hardware' started by Gareth Halfacree, 3 Apr 2025.

  1. yuusou

    yuusou Multimodder

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    Even if the VRMs aren't overheating, a transient spike may be enough to make the motherboard unhappy. That amount of hard reboots isn't expected. Maybe someone can send you a loaner board just to test CPU and/or RAM? A B550 or X570 perhaps?
     
  2. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    I'm going to start with a swap to the Wraith Thingy cooler. The 2700X was always happy under that. In fact, I'll do that now...
     
  3. wyx087

    wyx087 Multimodder

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    To rule out the RAM, can you set DOCP on for the timings and then manually drop the clock speed by a notch or two?

    5000 series are supposed to have better DDR controller than earlier.
     
  4. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    Yeah, that was the plan - it lets me adjust the speed in either direction while retaining the XMP timings.
     
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  5. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    Okay - old Wraith Thingy cooler sat there RGBvomiting all over the place, but more importantly also blowing air over the VRMs. I've also put the third 120mm Thermaltake fan I got in the side panel as an intake, to feed it cold air - connected to the CPU fan header, so that when the CPU fan is working hard so is the intake (and also 'cos I've already got three 120mms and a 140mm hanging off the singular chassis fan header, and Asus says that's only good to 1A - didn't want to push it with a fifth!)

    Now to test it under load, see what happens. Cross 'em if you got 'em!

    EDIT:
    Much, much noisier than the twin-stack with two slow-spinning 120mms, obviously, but not appreciably worse at cooling: it's keeping the CPU around 70°C full-load, which is fine. The extra cooling on the VRMs has made no real-world difference, though: scan-to-PDF run still takes 3m8s, same as before.

    Now to keep an eye on stability, and if I get any more crashes dial back the RAM from 3,600MHz...

    EDIT EDIT:
    Oh, and the roof fan's an outtake again.

    EDIT EDIT EDIT:
    Went back to my old-fashioned cliff-shaped fan curve: now the CPU (and side panel) fan(s) won't ramp up from minimum until at least 70°C, and won't get properly angry until above 80°C. No performance impact, big improvement in noise under load. I mean, it's still louder than the Thermaltake, but... I'll take what I can get at this point.
     
    Last edited: 15 Apr 2025
  6. lancer778544

    lancer778544 Multimodder

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    Can your case support an ATX motherboard Mr H? I have a MSI B350 PC Mate motherboard sat around not doing a lot, happy to do a swapsee for your Asus board if you wanted, I only use it for testing things.

    It's only one tier up on your current board but it has VRM heatsinks at least!
     
    Last edited: 15 Apr 2025
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  7. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    Very kind of you! Sadly, my case is a Define Mini - mATX or smaller only.
     
  8. lancer778544

    lancer778544 Multimodder

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    Ah no worries, hope you can get to the bottom of your issues :)
     
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  9. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    No crashes yet - two of the three happened shortly after resuming from standby, so I left it on standby over lunch. Other than the intermittent USB delay, no problems. Rebooted manually a few times to fiddle with the fan curve - I was idling at 54°C with the CPU fan duty cycle at 20% so I bumped it up to 40%, then down to 35% which has given me a good balance of not too noisy but idling in the mid-30°Cs.

    Going to reboot again to go turn off IOMMU, as that seems to be to blame for a few unclaimed IRQs I'm seeing at startup. Don't think that has any impact on stability, but it'll be nice to silence the errors on boot!

    EDIT:
    It did not silence the errors on boot. Bah!
     
  10. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    No crash this morning. Well, yet, anyway. It is pretty cold in the office, tho'.
     
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  11. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    Still no crashes. Threw another heavy workload at it for a few minutes, perfectly happy. Suspended over lunch again, woke up fine - no USB delay this time. Plenty of browsing, no issues. Even threw it into the powersave governor, to lock the cores at 2.2GHz and test really low load... perfectly happy.

    Maybe it really is just that this motherboard isn't happy with anything other than a top-down cooler... but also is incompatible with pretty much all top-down coolers. Nice one, Asus.
     
  12. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    10:59:24 up 1 day, 19:54, 1 user, load average: 0.57, 0.60, 1.01

    Still no crashes, though it did take a while for the USB devices to wake up this morning. Still don't know what that's about.
     
  13. RedFlames

    RedFlames ...is not a Belgian football team

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    ASPM or similar?

    Going back some but I recall having to turn off ASPM else my wifi card would not wake from sleep when the PC did.
     
  14. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    That's PCIe, this is only affecting USB. Looking at the logs, something's throwing it off and I have to wait for it to time out. But only sometimes, and it wasn't a problem on the old CPU. It's not a big deal, it only takes 30-40 seconds or so before I can log in.

    In other news...

    16:52:41 up 2 days, 1:48, 1 user, load average: 0.10, 0.41, 0.67

    Still hasn't crashed! That's with Eco Mode off, CPU running full-fat full-boost, memory still at 3,600MHz.
     
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  15. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    Spoke too soon: it just hard-reset. Bum!

    Dropped the RAM speed down to 3,533MHz. See if that does anything.
     
  16. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    Another crash, same symptoms as before: I'm doing very little - in this case I'd just brought up a save dialogue for an image in Firefox - and the screen goes black and the desktop instantly hard-resets.

    Dropped the memory to 3,466MHz, but I really don't think that's the problem.

    I'm going to have to take the CPU out and put the 2700X back in, aren't I? <sigh>

    EDIT:
    This is the longest of long shots, but I've also pulled the USB cable for the card reader in the multifunction DVD drive. That's the only other change I made when installing the CPU, and I am having that weird USB delay issue - so maybe that's to blame?

    'course, if this does fix it I won't know whether it was that or the RAM speed change that was the solution...
     
    Last edited: 18 Apr 2025 at 15:51
  17. wyx087

    wyx087 Multimodder

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    Hum, as you mentioned USB in your long shot. Another long shot: may be consider changing problematic USB devices to CPU ports or from CPU ports?

    Could also drop RAM to more widely known speed, 3200 MHz.
     
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  18. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    No crashes today. I'll give it the rest of the week, then risk bumping the RAM speed back up to 3,600MHz. If it doesn't crash after that, then it was the USB card reader all along!
     
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  19. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

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    Exciting new twist this morning: hit the keyboard to wake the system up from sleep, and nothing. Clicked the mouse, nothing. Hit the physical power button, wakes up fine... but all my USB peripherals are dead. Unplug and replug the hub... still nothing. Plug a keyboard into the front panel... nothing. SSH in, everything's fine. Restart via SSH, boots up, all USB devices spring back into life.

    And that's with the suspect card reader disconnected.

    Le sigh.

    EDIT:
    And a hard crash. Right, RAM at 3,200MHz...

    EDIT EDIT:
    Also moved the hub out of the CPU USB 3.1 Gen. 1 port into the chipset USB 3.1 Gen. 2 port. At which point the keyboard became unreliable, skipping keys. So, back into the CPU port it is! Shuffled things around to leave the chipset ports empty.
     
    Last edited: 22 Apr 2025 at 10:23
  20. sandys

    sandys Multimodder

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    Do a google of Ryzen 5xxx USB issues, there used to be problems that for most people have been pacthed out, I have a sneaky suspicion you are perhaps in the position where your bios or microcode has not had the appropriate bug fixes applied
     

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