Pink Screen Problem.!!!! need help!!!

[usamakhan1911]

Hi guys.!!!
Yesterday i build a budget gaming pc
here are the specs
Core i5 3rd gen
Msi h61 mobo
Nvidia GTX 560ti 448 cores evga
8 gb ddr ram
500w psu
My problem is when i play game (fortnite) medium to hight settings on unlimited fps my gpu temprature goes from 50c to 85-90c in 5 mins but when i lock my fps at 60 temprature stays at 70c-75c max but after 1 or max 1.5 hour my moniter screen turns pink and my pc got stuck. it happens twice in last 4 hour i have replace my dvi cable but nothing happen. but on my old mobo My gpu was working perfectly without any issue even after 4 to 5 hours of gameplay my tamp was under 80c.
So what is the problem is my gpu is faulty or something ia wrong with my mobo??
Thanks in advance.

PS.Sorry for my bad English

 

[scout_03]

where you using the same psu on both system and use gpu-z rendering option to stress test gpu and hwinfo to check is temp fan speed and voltages .