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I have Ubuntu 22.04LTS running on a pc that got:

Gigabyte Z790 Gaming X AX motherboard
Intel 14700 cpu
96Gb Crucial DDR5 Memory
MSI GForce 1070 with 8GB DDR5 
Corsair HX850 psu

Every time I use the

glmark2 --fullscreen --show-all-options

command under 4K this pc reboots at the squid test. However, under 1080p this collection of tests ends. Also, highly intensive graphics games just reboot the pc (4k or 1080p). Is this a driver issue? a PSU issue? How to be sure?

This machine starts and so far works well for anything but highly intensive graphics applications.

Jose Cabrera Zuniga
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  • It is hard to tell without exchanging the components and trying again. Run a memtest overnight to see if it is motherboard/cpu/ram/power supply related. If memtest runs fine for several hours this might be the GPU or software issue (drivers). If it hangs or produces errors - it is not the GPU. – Konrad Gajewski Jun 21 '24 at 21:37

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