Pc keeps freezing :(

[Kingbarrington]

After 10 - 15 minutes after I boot my computer it wil freeze I can literally be doing anything and it will crash the screen will just display a still image it isnt the the ram because i swapped it out with ram i know works and it didnt make a differnce and it isnt the hard drive because I tested it on another computer and no problems there it isnt the gpu wich i swapped for another one and i also tried using the pc without one but it still crashed specs are: pentium G4560 Gt 1030 2x4gb vulcan t force ram @2400mhz evga 450bt 450watt psu msi b250m gaming pro 

wd blue 1tb hdd any help is appreciated :)