@vawrvawerawe
If it's blue screening when updating the AMD graphics driver, then there are several possibilities, so here's two of them:
1 have you updated Windows with Windows Update? Install every patch. Which version of Windows are you on, anyway?
2 motherboard drivers. Again, these should be updated
Also, you might like to fill in your system specs in the forum usercp. Helps us to help you better.
Finally, I'm reading this thread and I'm not clear on something: are you actually saying that running the game on a 50" 1080p monitor runs with lower frame rates than on a 24" 1080p monitor? This can't happen as the performance is dictated by the resolution, not the monitor size, as others have said.