Help Needed. PC Resets only when I play a game.

I have had my pc for abour4 years now and I have never had this problem. Its fine when I am using it for the internet etc. When I play my game on it, after about an hour it resets by itself then when I open my game again it resets in seconds. I have checked for overheating but that doesn't seem to be the problem. I don't know a whole lot about computers, but websites have suggested maybe replacing my PSU? Any ideas?
Many Thanks

Spec
Operating System
Windows 10 Home 64-bit
CPU
Intel Core i5 6600K @ 3.50GHz 23 °C
Skylake 14nm Technology
RAM
8.00GB Dual-Channel Unknown @ 1066MHz (15-15-15-36)
Motherboard
Gigabyte Technology Co. Ltd. Z170-HD3-CF (U3E1) 35 °C
Graphics
VG278 (1920x1080@59Hz)
8192MB ATI Radeon RX 480 Graphics (XFX Pine Group) 41 °C
Storage
223GB KINGSTON SUV400S37240G (SATA-2 (SSD)) 29 °C
931GB TOSHIBA DT01ACA100 (SATA ) 32 °C
Optical Drives
HL-DT-ST DVDRAM GH24NSD0
Audio
Realtek High Definition Audio
 

Martinr36

MOST VALUED CONTRIBUTOR
is this a pc specialist computer, if so can you listyour full spec from your orders page, if not i'm afraid we wont be able to help as this is a dedicated pc specialist forum
 
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