5700XT freezing and crashing to black - GPU failure?

Computer Type: Desktop

GPU: Sapphire Nitro+ 5700XT

CPU: Ryzen 5600

Motherboard: MSI B450M Pro-vdh max

BIOS Version: 7A38vBM

RAM: 2 x 8GB Corsair 3200mhz

PSU: Can't rememeber

Case:

Operating System & Version: WINDOWS 10 PROX64 19045

GPU Drivers: Adrenaline version 25.12.1

Chipset Drivers:

Background Applications:

Description of Original Problem: The issue randomly started the other day while playing Fortnite. It was working without issue, the game closed for a bit and reloaded. It lasted about 2 minutes before crashing. The fan settings are maximised.

It seems to reoccur in any game where the graphics card is pressed to the max. It has previously not been doing this. No drivers have been updated. Windows did not update in that interim.

The only conclusion I can draw is that the GPU is finally unable to perform at max settings. It does not appear to be a driver issue and I have tried rolling Adrenalin back to 25.8.1. Are there any proposed underclock settings I could use for this to test it?