pc keeps crashing while playing games

[Mohand_1]

when i play any game my pc will crash after 15 to 30 minutes sometimes a hour if i am lucky the computer crashes and then restarts i have tried changeing my gpu from a gtx750ti to a gtx1050ti that worked for a while but the problem came back i tried useing new drives didnt work i tried useing old drivers didnt work what should i do here is my Computer Specs

psu : Corsair VS650 650W Watt Power Supply
gpu : GeForce® GTX 1050 Ti D5
cpu : i5 4460 quad core 3.2ghz
ram : 8.00GB Single-Channel DDR3 @ 666MHz
motherboard : MSI H81M ECO

 

[Lakken]

Any Bluescreen, errorcodes?

I have had same problem before. Then it was too high temps on the cpu. I cleaned out dust on fans and reapplied thermal paste, and it was all smooth after.
Check the temps while playing.

 

[RicoHet]

Download either: http://www.cpuid.com/softwares/hwmonitor.html (bottom left) or https://www.techpowerup.com/gpuz/ or both.

Run either one (or both) while playing any game(s) you may have and keep an eye on the temperatures. A good idea would be to play said games in windowed mode to keep a quick tab on temperatures OR take very careful notice of what the Max Temp. reaches.

Your GPU temp, should be between anywhere from 40C-60C depending on what kind of game you are playing, and if you are limiting FPS/VSyncing in that game or not. More demanding games (or if your just making your card perform at maximum capacity, even on older games.) may take your temps to 60C-75C but -should- NOT go above that, in most cases.

It may also be dust on one or several parts of the inners of your computer, conflicting drivers (sometimes even uninstalling drivers results in some remnants being left behind, that conflict with new) or it could be your PSU. Might also be somehow software related.

Tell us your findings on your temperature so we can rule-out/pursue other reasons.