Do you also have the latest motherboard chipset drivers from the motherboard/downloads website? Windows updates can mess with those, especially audio and Lan, but include pcie, USB, Sata etc.
What were the gpu temps before the crash? Are the fans on the gpu working to correct speeds? Is the heatsink clean or full of dust? Not just the fan itself. Almost all gpus only have 1 temp sensor, on the processor itself, but artifacts like this can occur when the vRam or VRM's on the card overheat, which won't be seen by the gpu.
You can also try undervolting the gpu slightly or underclocking the speeds/memory using msi Afterburner or Evga precision-x etc. If that fixes the issue, you can be certain the card is defective.
The 5700/XT has had issues like this, amd has supposedly issued a fix in the recent drivers package, but there's still no guarantee its 100% cured.