Mystery problem causing crashes.

[Flaminx]

I bought a PC from Computer Planet a couple months ago and since then I've had issues with my graphics driver crashing in games, it's very infrequent and despite my constant monitoring I can't suss out a problem that is causing it. So far the driver has stopped responding with Warthunder, Gta V and The Witcher 3. Like I said it's very infrequent but the possibility of a faulty PC bothers me.

 

Cpu: i5 4690 3.5GHz

 

MotherBoard:Asus Z97-k

 

Gpu: MSI Gtx 960

 

Storage: 1x 500gb Seagate HDD

 

PSU: CX750

 

RAM: 1x 8GB DDR3

 

The only thing I can think of is the PSU not supplying enough power as I've heard the CX series is unreliable but that's only a hunch. Any ideas would be appreciated!

 

( I also plan to replace the GPU with a 970 and the PSU with a nicer EVGA model but I want to make sure i'm not overlooking something obvious.)