Guild Wars 2

My computer resets for no reason

that’s it, its been about 3 days since this started happening, at first it happened only while playing GW2, but then I tried a couple of games and it happened too, any ideas on what might be producing it?

what I’ve already tried:

-It is not a temperature issue, CPU and GPU never go above 50°C
-I updated any posible driver
-I removed an old HDD I installed a couple weeks ago

My setup consists of:

-Motherboard: MSI b85-g43
-GPU: Nvidia GForce GTX960
-CPU: Intel core i5 4690 – 3.5GHz
-RAM: 16GB 1600MHz G.Skill ripjawsX (2x 8GB)
-PSU: Coolermaster 80Plus Bronze 750W

all of it inside of a Coolermaster Cosmos SE tower with 5 fans, 2 of them on the water cooling system.

any ideas?

First disable automatic reboot on system errors so you could see if it is a bluescreen.
If it is not a bluescreen and your PC simply reboots its mostly the power supply.