BSOD and Others analysis

Hi guys i need help just 2 got graphics card installed GTX 295 and Sli'd them.
Also bought a new PCU 850 watts to back up these 2 cards.
Computer was working fine before i installed them.
but now since i installed them i get random BSOD
And every 10 mins or so my monitor screen will turn black but everything will still run as i can hear my music.
When play a game after 10 mins it turn my monitor to pink and yellow for some reason

- x86
- Ultimate
- OEM

- Few years old around 3
- 1 Week

Your graphics card driver nvlddmkm.sys triggered the crash
Considering that you've got display artifacts the cause might be overheating or defects in one of your GPU
Test each card individually with OCCT
https://www.sevenforums.com/tutorials...test-occt.html