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HP Recommended
HP Spectre x360 15-df0002tx
Microsoft Windows 10 (64-bit)

I have a HP Spectre 15 2019 Model with GTX 1050Ti Max-Q. It contains Intel AC 9650 WiFi Card. I have come across a very strange issue, whenever GPU is under load wifi connection starts losing packets to the point its basically unusable. It happens instantly, for testing i opened up cmd window with "ping google.com -t" and stress the gpu with furmark. As soon as the stress starts most of packets start getting timed out and some go through with insanely high ping. Stopping the stress test immediately resolves the issue.

Upon further investigation and googling, many other laptops seem to report this issue and nothing fixed it for them except for workarounds.

The issue only appears when connected to 5GHz WiFi not on 2.4GHz. And even on 5GHz if you go to Network Card properties in Device Manager and change 5 GHz Bandwidth to 20MHz only that resolves the issue (although that is not a usable option since it limits 5GHz to 144Mbps only).

Lastly, the issue only appears when laptop is plugged in, not on battery power. This led me to open up MSI Afterburner to see GPU Clock Speeds, and i found something confusing and interesting. When pulgged in and under stress GPU MemoryClock is around 3500Mhz and on battery it drops to around 2500MHz, to test i under-clocked the memory clock by -500 and issue was gone. Digging deeper into it i found that it only appears when memory clock is left at default speed of 3500 under load. When we over or under clock it even -+100MHz the issue disappears. This is most usable fix to the problem so far without affecting any functionality.

I don't know what could be causing this, any input would be appreciated seems to be some issue with PCI bus. I would really like to come up with a logical explanation of this weird issue.

I also tried updating wifi and bluetooth drivers from Intel's site and no change, graphics drivers are already up to date.

Below are few links of similar issues that i found:

https://forums.tomshardware.com/threads/stressing-gpu-causes-packet-loss-and-network-dropping-over-w...

https://linustechtips.com/main/topic/1217166-stress-in-gpu-causes-the-wifi-driver-to-get-removed/

https://steamcommunity.com/app/219740/discussions/2/1748980761794678793/?l=french

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