CPUs in our HP Z640 Workstation are overheating. Automatic fan speed control does not work (based on CPU load / temperature). CPU0 and CPU1 fans has the same rpm even the load is almost 0% and temperature 35°C or 100% load and 89°C CPU temperature.
HP support does not know how to solve the problem at all. During 2 months warranty claim they already changed motherboard, new fans on rear case wall, new USB module on the front case wall. It did not solve the problem. Updated BIOS. Reinstalled OS Win 10 Pro + all drivers. Nothing helped after 3 HP technicians visits onsite.
I am very disappointed with HP support. I will never ever buy any HP product anymore.
Configuration: 2x CPU Intel Xeon E5-2690 v4 (14x core @ 2.6 GHz), 128 GB ECC RAM, HP NVIDIA Quadro M4000, 8GB GDDR5
Motherboard: HP model 212A, version 1.01
Current BIOS: M60 02.50 (newest available). I already tried to downgrade to M60 02.48 if it will help as I expected there is some software bug in the BIOS. It did not help. Then I tried downgrade to M60 02.31 from 2017 year when thsi PC was procudes. Did not help, too.
When I set "Idle fan speed" option in BIOS to maximum, then CPU fans are around 5000 rpm. But also both rear case wall and front case wall fans rotate at thousands rpm. With this cooling power CPUs even under heavy load 100% don't exceed 50°C. Nice. It this is not workstation but server placed somewhere in data centre, I will keep it as it is. But it is on the desk in our officee. And with such Idel fans rpm it's very very noisy.
This super power and super expensive workstation is useless when you cannot use the power because you don't want to destroy CPUs. Instead of rendering in 3DS Max it is possible to use it by secretary for replying emails and writing in MS Word 😞
CPUs temperatures and fans rpm I watch in HP Performance Advisor SW.
I asked Intel support to give me their opinion. They stated that at 89°C CPU makes throttling to do not exceed TCASE temperature. Case Temperature is the maximum temperature allowed at the processor Integrated Heat Spreader (IHS). So the CPU is shutting down core by core and reducing frequency to avoid this temperature to be exceeded. It's clear that running CPUs at these max temperatures will sooner or later kill CPUs.
Exactly same problem many people already described in other topics of this forum. Ie. (it's totally stupid on this forum that I must create a new topic, cannot post just reply to some existing):