Why Are My Games Crashing Randomly with My New RTX 3070 Ti?

Hey everyone! I'm having frustrating issues with random crashes while playing games on my recently purchased RTX 3070 Ti. I got it secondhand but it's a brand new RMA replacement, and while I do believe the card is in good shape based on the benchmarks I saw, I'm still facing problems.

Here's the scoop:

- **Path of Exile:** The game crashes unpredictably, whether I'm in my hideout or in the middle of an intense map fight. Sometimes it lets me play for about 15 minutes before crashing. Here's a snippet from the logs I found that might be relevant:
- "The GPU device instance has been suspended... The GPU will not respond to more commands..."

- **Warframe:** This game is pretty much unplayable for me right now. It crashes frequently, even at the login screen with just my character showing. When I can actually get in-game, it crashes almost immediately. The logs give me errors about "DXGI_ERROR_DEVICE_HUNG" which sounds serious.

- **World of Warcraft:** It usually runs without major issues, but occasionally the screen goes black, and the game needs to rerender after a few seconds, messing up my resolution.

- **Elite Dangerous:** No problems at all here; everything runs smoothly, even under heavy load.

Here's my setup:
- MSI x470 Gaming pro max (with XMP on and game boost off)
- Ryzen 5 3600
- 1x16GB 3200MHz RAM
- Super Flower Leadex III GE 850W PSU
- Acer 180Hz 1440p monitor and a Dell 60Hz 1080p secondary monitor

I've also attempted a full DDU before installing the latest drivers (576.40) after switching from a 1060 6GB. My CPU is also well within safe temperatures, staying below 70°C.

If anyone has any suggestions or insight into what's going on, I'd really appreciate the help!