HP Z2 SFF G9 Workstation Overheating

[stevewark]

My HP Z2 SFF G9 Workstation Desktop continually overheats,  it continually generates Windows Error Reporting events 1001 LiveKernelEvent, Problem Signature 141.
I'm currently running it without the case lid so as to stop heat buildup inside the case but monitoring still shows CPU core temp hitting 100 deg C.
I was considering mounting anorther fan in the case, but after leaving the case top off and not seeing any real significant improvement I'm not sure this will work.
Is there a better CPU cooler that can be mounted onto the CPU with the SFF form?
My work load can sometimes get high cpu requirements with SQL server but a good part of the time I'm connected to remote servers so the cpu load is elsewhere.
I have installed 2 additional SSD drives and expanded ram to 96Gb.
I've seen other messages regarding this model and overheating, so I'm wondering have I brought a "lemon" or os there something that can be done?

[DGroves]

do you have a different cpu other than what it came with installed?

normally the bios will detect this and give a 9xx fan error

https://support.hp.com/bg-en/document/ish_6901028-6901145-16

however if you have the thing maxed out with drives/ram and cards this also can cause the internal case temp to spike using a HP approved cpu. 

your system uses a intel "Raptor Lake"/ Alder Lake  family's  CPU

intel performance coper core cooler

https://www.ebay.com/itm/365072454737?_trksid=p2332490.c101875.m1851&itmprp=cksum%3A3650724547370983...

HP Liquid AIO not sure fan will mount/fit in your model system

https://www.ebay.com/itm/365678947092?_trksid=p2332490.c101875.m1851&itmprp=cksum%3A3656789470920983...

HP made a optional fan/bracket tray to help cool the system do you have this installed?

[stevewark]

DGroves,

Thanks for the reply. 

No other hardware updates have been made other than extra ram and SSD drives. 

Strangely, I rarely hear the fans ramp up in speed.
Currently I have case top off to stop heat buildup inside case.
Looking at the system as supplied, there are 2 fans cooling the the cpu, the attached to the cpu cooling at a slight angle, the second is between the heatsink and the case, in a small black plastic case. This could be the optional fan you talk about, but it was supplied with this. Picture below.

Cheers

Steve Wark

[DGroves]

from the picts you appear to already have the upgraded cooler that was used for the systems with i7/i9 cpu's

HP sets it's thermal fan profile settings on the SFF systems to be aggressive and ramp up rather quickly when the cpu temp spikes it will then ramp down fairly quickly this is normal behavior the cpu cooling system is also used along with the power supply fan to exhaust air out of the system

just how are you determining that the inside case temp was over 100 degrees?

[stevewark]

HP must have upgraded the cooler with newer releases.

It's not the inside of the case but the CPU reaching 100 deg,  I'm just running the "HP Performance Advisor" System Sensors and it creates a warning at 100 degrees, plus I also used Hardware Monitor to confirm.
I also realised the HP sensors are returning the RPM of CPU Fan, Rear Chassis Fan1 and Power Supply Fan and I was able to see the CPU fan ramp up.

Today system has been running much cooler, generally between 50-70 degrees, not sure why, I don't think my workload has been very much different, be it I still have the top of the case off.

Thanks for your input / advice.

[DGroves · Accepted solution]

while AMD's cpu's nowadays run quite cool with most of their lineup at 65 watts or less this not the case for quite a few intel cpu's which can be 130 watts or more

i recommend you visit the intel site and look at the specs for your cpu as it appears your system is most likely operating normally within it's design specs

it's normal for any cpu to increase/spike in temperature when under a heavy load and then cool down when the cpu load decreases