Is my GPU faulty?
Is my GPU faulty?
The BSOD displayed Vanguard, Riot's anticheat, suggesting it wasn't connected to your issue. If DDU doesn't resolve the problem, a faulty GPU is likely the culprit. Consider updating drivers from November or December, as newer versions may have issues; however, 30 series should generally be stable.
I've completed DDU tests, but it's surprising it didn't occur when idle and remains stable even at high loads. With the money-back guarantee still active, it might be worth submitting a return and providing screenshots of the blue screen data in Event Viewer.