Computer freezes quickly after opening a games, runs adobe software fine

[inguew]

Setup:
Mobo: Gigabyte B150M-D3H-CF (U3E1)
CPU: Intel Core i5-6500 CPU @ 3.20GHz
Ram: 2x Crucial 4GB DDR4 2133
Video: SAPPHIRE Dual-X R7 370 2GB
HD: 931GB SAMSUNG HD103SJ ATA Device (SATA) & 298GB Western Digital WDC WD3200AAKS (SATA)
PSU: Corsair HX520W
WLAN: Ralink RT61 Wireless LAN Card V2
OS: Windows 10

The computer will run adobe software like lightroom fine but when I open a game (Guild Wars 2) the it'll freeze within a couple minutes. Completely locks up and audio cuts. No bluescreens or reboots, just freezes.

The CPU, ram, mobo and video card are all brand new with the rest of the setup being over 5 years old. They replaced Intel E8400, 4GB ram, Gigabyte P35-DS3L, 512MB NVIDIA GeForce 9600 GT.

I've tried:
Re-installing drivers
Clean install of windows
Un-overclocking the the video card

I thinking with the PSU beign so old and close to the line it is probably the issue. Is there anyway of testing it's my PSU before I buy a new one?

 

[Geek2015]

Try other games. Run the game in compatibility mode (Windows 7 preferably), see how it goes.

 

[inguew]

Try other games. Run the game in compatibility mode (Windows 7 preferably), see how it goes.

Hi I don't have any other game..

I ran GW2 in windows 7 compatibility mode twice same thing happened.

Next I ran it normally three time with speccy open on top to check temps.

1. CPU: 62°C Graphics: 48°C
2. CPU: 58°C Graphics: 48°C
3. CPU: 60°C Graphics: 49°C

Each time it froze when the CPU reached ~60°C.

I'm using a stock intel cooler so I guess I'll try reapplying the thermal paste?

Not sure if the high CPU temps are the cause or just a correlation.

My CPU rests at 25°C, testing if Premiere pro can get the temp up.

Update:

With a full adobe suite open running some tasks I got the temps up to 65°C+ no freeze. I freaked out when it hit 67°C and closed everything. I have no idea what this means.

 

[inguew]

Solved it, I had applied thermal paste/CPU fan incorrectly. Re-installed and CPU temp sits at around 42°C while gaming.

Thanks Geek2015 for leading me to the road of success.