PC crashing when playing any game

[CPKezza]

My PC is crashing when I am playing any game on any platform i.e via Steam, BattleNet etc. The PC just crashes completely, no errors, I am unable to go to Task Manager, the only way to stop the crash is powering the PC off manually. There is no consistency when the crashes happen, sometimes it can go hours before a crash.

PC specs:-

CPU: i7-4790K 4.0Ghz Quad-Core (not overclocked)
Motherboard: Asus Z97 Pro Gamer ATX LGA 1150
RAM: Kingston HyperX Fury Black 2x4GB DDR3-1600
SSD: Crucial MX100 256GB
GPU: Asus GeForce GTX 1050 Ti 4GB
PSU: Corsair CX 600W 80+ Bronze Certified

P.S this is my first post on the forums so please forgive if I have missed out some obvious points! I appreciate any feedback.

 

[alexoiu]

It happend right after (if) upgraded the graphics card? What was the old one?

 

[CPKezza]

It happend right after (if) upgraded the graphics card? What was the old one?

It happened before and after replacement of GPU. Old GPU was Asus - Radeon R9 270X 2GB DirectCU II

 

[WildCard999]

Even though the CPU isn't overclocked what temps are you getting when you start gaming?

 

[CPKezza]

Even though the CPU isn't overclocked what temps are you getting when you start gaming?

When gaming, from 63-70 temp

 

[CPKezza]

Update: It is now blue screening with the WHEA_UNCORRECTABLE_ERROR - I have tried "Resetting" Windows 10, and I am unable to do that with the "There was a problem resetting your PC". I have a feeling this is more of a hard disk issue.