My computer Is laggin/going to sleep mode when I'm playing.

[Mark_Wilson]

Hey as I wrote above my computer going to a sleep mode, when I'm playing ANY kind of game from Runescape to World of warcraft.
I can play about 5-10 mins and the monitor will go into a sleep mode or just freeze and you'll will have to restart the computer.
I have tryed to clean up the computer (Ccleaner, Removing all the unused programs,anti-virus ) but It's still doe's It whenever I'm playing a game.
The computer is kinda new 1-2 years old, but the monitor I had for a LOOONG time 4-5 years, It's also did the same trick on my old computer (The monitor going to sleep) but when i got my new computer the problem stop and now It's there again.

Hope you will help me out I'm soon gonna die if this keeps going on.

Windows 7
Intel(R) core(TM)2 quad CPU Q8300 @
2.50GHz 2.50 GHz
4GB ram


BTW My CPU is allways at 30-50 when I'm not playing anything.

[Aimzz]

Tell me your graphics card specifications