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HP Recommended
Envy x360 15z-ds100
Microsoft Windows 10 (64-bit)

Envy 15z-ds100 version:

AMD Ryzen 7 4700U

16GB DDR4-3200

Win10 Pro

 

I've noticed that the HP Command Center "Performance" option turns down fan speed relative to "Balanced" even with higher thermal limits. This is causing thermal throttling in games like Civilization VI: Gathering Storm after a period of time. I've verfied thermal throttling by using a laptop cooling unit under my laptop while gaming. This stops all performance issues and both CPU/iGPU stabilize. Stuttering in game stops.

 

Balanced profile doesn't exhibit these issues and has higher fan speed with a 18-19W APU STAPM limit and 15-20W cTDP. Performance option is putting APU at 25-30W cTDP with a 25W STAPM limit. That limit can't be reached without throttling. I've only managed to reach the Peformance profile STAPM limit by using my external laptop cooler.

 

Other bugs: While leaving  Civ 6 idling but alt-tabbed out until display off timeout (laptop plugged into AC), Windows would enter modern standby with game still running in background, but laptop fans would be turned off. I encountered extreme thermal issues when this happened (at least 2-3 times). tCtl/tDie (CPU/GPU junction temps) spiked to nearly 110C and system eventually was forced into hibernation due to thermal event. I've since repasted the APU (4700U) with IC Diamond as I know it's stable enough for these high temps and haven't experienced the issues I had with the old paste. I did see an option in UEFI to leave fans always on, but this is a terrible workaround.

 

Here were the temps I saw:

Screenshot (18).png

If embedded image doesn't show, see here: https://1drv.ms/u/s!AkSs8pzSzi3l0l4p786L9rXBmHFO

Naturally, the system was extremely unstable after reaching those temps. It eventually crashed shortly after I took that screenshot. The thermal paste also needed to be replaced as APU kept running hot after this scenario. Thankfully, HP has a wonderfully modular design and it's very easy to self-service (was changing my NVMe drive from OE 512GB Intel 660p to 1TB SK Hynix P31 Gold anyway). No serious thermal events since.

 

Anyway, some fixes are needed:

Add more fan speed in "Performance" profile in Command Center (should be higher than "Balanced", not lower)

Work with Microsoft to stop Windows from going into modern standby and turning off laptop fans when a demanding application is in background using CPU/iGPU or simply keep fans on when CPU/GPU usage and temps are high

Change UEFI thermal throttle point (based on cTDP or APU STAPM) that allows Performance profile to work without thermal throttling

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