What CPU VRM temperatures should I stay below for Supermicro H11DSi (Workstation Build)?

[erock]

I have read several threads on this forum about how CPU VRM temperatures may get out of hand in a full tower workstation case with Supermicro H11DSi especially for high TDP CPUs (e.g. 7f52). A few of these posts recommend for builders to use a 4U chassis instead and just deal with the noise. I have several builds with Phanteks Enthoo Pro 2 and Dark Base Pro 900 cases and Noctua NH-U14S coolers and haven’t had any issues during stress tests running for several hours and even for parallel CFD calculations running for over a week. Based on what I have seen so far, I am maxing out at VRM CPU temperatures around 71-72C with heavy loads.

So what VRM temperatures should I be concerned about on the H11DSi that require additional action?

See below for some results from ipmitool I obtained from testing a machine with H11DSi + 2x7f52 (258GB RAM) in a Dark Base Pro 900 case with three 1000rpm front fans, one 1000rpm back fan and Noctua NH-U14S coolers with 1500rpm fans blowing upwards (fans were at full speed during test):

stress-ng —cpu 30 —vm 30 —vm-bytes 75%
————————————————————————-
Test Duration: 4 hours
CPU: 60C, 63C
VRMCPU: 69C, 69C
VRMSoc: 57C, 67C
VRMHA…: 64C, 80C, 74C, 59C
DIMM’s: 49-65C

stress-ng (max cpu’s)
————————————
Test Duration: 2 hours
CPU: 61C, 61C
VRMCPU: 72C, 72C
VRMSoc: 50C, 54C
VRMHA…: 53C, 66C, 54C, 47C
DIMM’s: 38-49C

 

[bayleyw]

Temps look fine, and if you're doing CFD you'll be memory limited and not be putting 100% stress on the cores anyway.

 

[RolloZ170]

generally the lower the better, here is a current derating courve of a typical MOS power stage.

max. current is 65 Amps but from 25C celsius the de-rating starts.
at 70C temp the power stage can deliver 52 Amps and at 100C only 40 Amps...