There seem to be 4 different 40x10mm noctua fans that I think are the right size to replace my mos fans but I can’t find a hint of what voltage the m/b supplies to the fans. Can someone confirm which would be a suitable replacement?
Since this threadripper board seems not to be supported by lm_sensors in linux I’m having difficulty finding what temperatures the mosfets reach and thus how to adjust the fan curve in the bios. I think it would be best to just find the quietest replacements I can and see if that fixes my noise issue.
Same as a regular PC fan header (which, in fact they are). I purchased… MANY different fans, also thinking to replace the VRM fans. But even going with Noctua or pricey server-class ones, nothing had better a better sound:performance ratio than the stock fans. Turns out ASRock didn’t skimp on the quality there. I even tracked down a 40x20 version from the same fan OEM, and that wasn’t better either.
I would suggest doing some tuning via the BIOS, you don’t need a ton of revs to keep the VRM cool. I’m planning on playing with my system later, so I’ll see if I can grab a photo of my speed curves.
Side note… The VRM fans do give a bit of airflow to the RAM/socket area, so I’d generally tune for “fastest speed I can audibly tolerate”, not just for VRM temps. As any extra airflow may not help the VRM, but may help keep the RAM a bit cooler.
That’s a reassuring reply, since I’ve realised that the fans are wired two to a header, which, if I bought new fans would require cutting and splicing?
Right now I’m suffering an incredibly noisy Noctua NH-D9 TR5-SP6 4U, which ‘surges’ for no apparent reason. This is two heatsinks and two fans, whichever fan I put between the two heatsinks is the one that surges, I can stop the outside fan with my finger and the noise level doesn’t change:)
I could understand if the fan speed increased when strating a new process etc. but it is the surging of the noise. I’ve tried all the preset fan curves that the asrock trx50 has in the bios.