Random black screen occurs

[Guest]

Hi guys i recently installed a new GPU for my system. But since then i have randomly now and again (about once every 3 hours) will get a random black screen and i will need to do a hard reboot. Does anyone know any solutions. I have installed up to date drivers

 

[Sunius]

Telling us your computer specs should be the first step.

 

[Guest]

My specs are

i5-650
4gb ram
radeon 6870
xfx 550W PSU

 

[Sunius]

I'd check your memory using memtest x86:

www.memtest.org

 

[Guest]

How do i use this sorry?

 

[Sunius]

Download the installer, install the software onto a flash drive, restart your computer and then boot from the flash drive.

 

[Guest]

Everything was fine it passed

 

[Sunius]

No errors?