PC freezes when playing graphically intense games

ShafeDogg

Honorable
Nov 30, 2016
43
2
10,535
I've been having a problem for quite a while now, where whenever I play a game, my computer freezes after playing for a while, maybe 20-30 minutes in or a bit longer. I'm able to eventually close the game using a combination of task manager and ctrl+alt+delete, but sometimes the screen goes black for a moment after it is closed, or the game will stay frozen and on the screen when I try to alt+tab. I've had two error messages that I'm aware of, the first being "X game has been blocked from accessing graphics hardware," and the second being "display driver has stopped responding and has recovered," both occurring after a game freeze. I've tried reinstalling drivers many, many times using DDU, and I've ran both SFC and DISM to try to solve other potential issues. I'm truly out of ideas, and I'm hoping my graphics card is okay and I can fix this without buying new parts. Please let me know if any more information is needed. Thanks for any tips and help in advance!

Specs:
XPS 8700 System
i7-4790
GeForce GTX 750 Ti
16GB RAM
Dell 0KWVT8 Motherboard
Windows 8.1 64-bit
 

ShafeDogg

Honorable
Nov 30, 2016
43
2
10,535


It occurs with basically every graphically intense game I play, like Skyrim, Left 4 Dead 2, and Killing Floor 2. I've noticed that simple games don't seem to crash, like Oldschool Runescape for example...
 

ShafeDogg

Honorable
Nov 30, 2016
43
2
10,535


My PSU is a 460W by "Shenzhen Huntkey" (according to a post I made here in the past) which is the original placed in by Dell.