New graphics card issue

Mehrab1995

Reputable
May 12, 2015
7
0
4,510
Before i proceed.Take a look at my rig:

CPU:AMD FX-8120
GPU:Sapphire R9 285 dualx 2gb
PSU:Space 600 W
Mobo:Gigabyte-970AD-3

Recently I borrowed this R9 285 dualX 2gb from my friend just to play AC:syndicat.In his pc it runs well.But when I installed the card in my rig and installed drive,everything came out fine.But whenever I started the game,My pc is auto re-starting.Its a direct reboot.Everytime.First time i thought maybe its a version issue,but with every version its happening.My own card is a GTX-550ti 1Gb.Its not enough to run the game so I changed.The funny thing is,This is occured with almost everygame.Even with games like dota 2.Pc reboots in the middle of the game.Can someone help me please ? I really want to play the AC:Syndicate.

Thanx in advance.