Screensaver preferences crashing 2017 15"MBP

So a week or 2 ago I changed my screensaver from 'word of the day' to 'Drift'.

I would get crashes (your mac restarted because of a problem) intermittently when it came out of screensaver/sleep mode.

At first I thought this was to do with a hardware peripheral (wacom cintiq plugged in using a usb+hdmi adaptor), so I left it unplugged to see if the issue resolved. I also updated to catalina 10.15.7. The mac still crashed ad rebooted when moving the mouse while the screensaver was on.

I now know it was the screensaver for certain, as I went to change it back to word of the day, and clicking a new screensaver forced the black screen of death.

Has anybody encountered this issue before? Is there a way to check the health of my video card?

Thanks

  Model Name: MacBook Pro

 Model Identifier: MacBookPro14,3

 Processor Name: Quad-Core Intel Core i7

 Processor Speed: 2.9 GHz

 Number of Processors: 1

 Total Number of Cores: 4

 L2 Cache (per Core): 256 KB

 L3 Cache: 8 MB

 Hyper-Threading Technology: Enabled

 Memory: 16 GB

 Boot ROM Version: 428.0.0.0.0

 SMC Version (system): 2.45f4