Sometimes my screen gets a blackout.

[Demonic]

So I've attempted to play Hawken and Crysis 3 and this also rarely happens on gmod.
So basically my screen either gets a blackout for 2-4 seconds or sometimes my screen just completely loses signal and I've to restart my computer by pressing shutdown button to fix this problem Any suggestion how I might be able to fix this?
Information about my display

[Image: 1_zps0af25016.png~original]

[Roachy]

I had the same problem with my old graphics card, It's because your card does not have enough memory.
My old card was a NVIDIA GeForce (Can't remember the series) only had 512mb memory, my screen would do the same and I had to restart. I upgraded to my new one with 1GB of memory, everything works fine.

[Demonic]

But you see I got 2x of this video card in my computer that work together (Crossfire). It's a special feature.

Look Also is it possible because i have a pretty big screen? this is the screen i use http://www.walmart.com/ip/Philips-32-Cla...7/14860125 and i use HDMI cable

[Image: 123_zps234e093f.png~original]