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HP Recommended
HP Z8 G4 RCTO Base Model Workstation
Microsoft Windows 10 (64-bit)

Hi,

Desperate here. My system was working  fine until I upgraded my graphics card.  After the upgrade I am having a huge issue with the second CPU fan. It started running at full throttle and would not stop no matter what I did. Namely, switching fans from CPU0 to CPU1, changing CPU positions, replacing the fan, plugging GPU in different PCI slots. Nothing helps. I am sure it is not a software or BIOS issue. The throttle begins as soon as power is pressed.  At this point I am out of ideas what is causing this. Faulty motherboard, CPU? Everything else is working fine and  the pc passes all diagnostic tests with flying colors.  Just the darned fan noise is so annoying.

 

1 REPLY 1
HP Recommended

what is the video card you installed?

 

the base models came without optional cooling fans and higher wattage power supplies

 

so i suspect the bios when querying the system components on startup is detecting the increased power draw of the video card or that you indead do have a overheating issue on cpu 2 (check cpu temps) using a program like

HP Performance advisor, or aida64

 

https://www.hp.com/us-en/workstations/performance-advisor.html

 

https://www.aida64.com/

 

however what is strange is that you appear to have a dual CPU model system and that only cpu 2 fan not the case fan(s) is ramping up in speed

 

i would contact HP support as this series model is still under factory warranty support

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