Monitor randomly loses signal?

[houndster]

I've recently instaled a saphire x1950pro which has been running fine for about 2 weeks until yesterday when playing games the monitor would lose signal, although the pc did not shutdown it still required a reboot to get it working again.
This happened a number of times. Does anyone know if its a PSU problem, Driver issue or what?

Current PSU stats are:

450w
Output:
+12v 20A
+5v 40A

+3.3v 28A
-5v 0.5A
-12v 0.8A

Any advice will be much appreciated.

 

[houndster]

3.2ghz intel core 2
2gb ram
Asus M/board (cant remember the actual model num sorry)

The CPU runs at 28c - 34c so its not over heating...
+12v is running 11.93v under load...

 

[houndster]

GFX card temp when playing games is 54c, I have cleaned out the old drivers and installed latest.
No i havn't tried another graphics card.. you think im made of money?

Ive just purchased http://www.overclockers.co.uk/showproduct.php?prodid=CA-021-EN&groupid=701&catid=123&subcat=111 and http://www.overclockers.co.uk/showproduct.php?prodid=SY-000-GE&groupid=701&catid=57&subcat=

Which should arrive tomorrow and see wht difference these make..