Question New PC build - Freezing & Crashes

[Whitlam]

System will freeze / crash when launching or running games. This also rarely occurs when streaming video and browsing web (Firefox / Edge).

Temps seem to be fine on GPU and CPU.

PC BUILD:
OS: Win 11 Home
Motherboard: Gigabyte B760I Aorus Pro
CPU: Intel i5-14400F
GPU: AMD Radeon RX 7800 XT (powered through 2 separate PCIe cables)
RAM: G.Skill Trident Z5 RGB Series (Intel XMP) 32GB (2 x 16GB)
SSD: Samsung SSD 980 1TB
PSU: Corsair SF850L Fully Modular
Cooling: 2x Mobius 120 OC Case Fans
There are 2x monitors one through DP > HDMI and the other HDMI > KVM switch HDMI then KVM HDMI > HDMI. Not sure if this is related.

I have not made any changes through the BIOS menus (thinking there is maybe something there?).

Drivers have all been updated as at 10/01/2025.

I've checked the Event Viewer, but not sure if this actually assists in diagnosing the problem.
Event Viewer:
Critical: Event 41, Kernel-Power - The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

There are also some non-critical errors that are appearing if required.

Any assistance would be greatly appreciated.
UPDATE

I've re-connected all the power connections and re-inserted RAM, GPU into the Mobo.

BIOS has been updated.

GPU and PSU fans spin up when PC starts, but I've noticed they don't spin up when games have launched and are running. Presume that they don't spin up when under low load.

AMD software is showing that the GPU is utilised and the Device Manager say the device is working properly.

Utilisation at around times of crash:
CPU: 20%
GPU: 20%

Same problems persist, but seems like it's taking longer for the crashes to occur on average.

 

[helpstar]

did you connect both connectors on the psu side which are split for the main 24pin power connector on the motherboard side?


update BIOS of motherboard

 

[Whitlam]

UPDATE

I've re-connected all the power connections and re-inserted RAM, GPU into the Mobo.

BIOS has been updated.

GPU and PSU fans spin up when PC starts, but I've noticed they don't spin up when games have launched and are running. Presume that they don't spin up when under low load.

AMD software is showing that the GPU is utilised and the Device Manager say the device is working properly.

Utilisation at around times of crash:
CPU: 20%
GPU: 20%

Same problems persist, but seems like it's taking longer for the crashes to occur on average.

 

[steveb1976]

it sounds like a graphics driver issue. . have you tried with 1 monitor only. and see if that is the cause..

as for the gpu fans.. they are designed to only kick in when the gpus get to a certain temperature then they will come to life. .but it could also be a failing in the gpu.. test it below.

do you have gpu-z installed. if so open the app and then click the " pcie render test" ( its the button next to "pcie4 x16 " part.. if it crashes with this. its a graphics card issue.