I've also been having the same problem for a couple weeks now.

Mine also goes blank with a black screen every so often, really frustrating

when you're in the middle of something.   

I have a Dimension 9150  any sort of help would be appreciated. 

Ok did what you said with the monitor and it's working fine according to what you asked me to do.

I uninstalled the video drivers and installed the updated version.

Still having the same problem. 

The card i'm using is the 7900 GS which is what came with my Dell.

I then tried swapping the card out for another 7900 GS which was in my other Dell

(that doesn't have any problems and is working fine). 

I still got the same problem, so it must be something with my computer.

Not sure what else to check at this point.  :smileysad: 

Yeah, both video cards have the same problem in this pc.

They are identical cards 7900 GS.

I took the one from my other Dell which has no problems

and put it into this one to test it to see if it was my card that was vaulty.

But, i'm still getting the same problem.

I know for a fact nothing is wrong with the card that I put in to test

because the computer (which is the same identical spec) that I took it out

of has no graphical problems at all.

Which makes me wonder if it's something else causing the problem.

I have found that after the computer has booted up and been on for awhile

the pixels seem to be fewer however, i'm still getting some pixels which

as you can imagine can be irritating when you are trying to work. 

 

This almost sounds like an electrical noise problem or possibly a bad cable. I would try the the cable from the other monitor or hooking the other monitor cable and all up to this machine. Just a thought.

 

Regards - MichaelO

XPS700 - Black
E6700 1.1.6 Bios - OS XP MCE 2005
4GB DDR2 PC2-5300 @ 667 Mhz
24 in Dell 2405FPW
768 Mb EVGA 8800GTX
XFI w/ Logitech Z-5450 5.1

If you have it still, F12 to the boot menu and run the diagnostic tools for video card. If not, download the ISO and burn a CD with it, boot to that, run tests. What you're describing is one of the potential signs of a memory corruption problem (on the card) caused by overheating. I've had FOUR 7900 GS go bad with this problem already (and one of the replacement cards shipped to me with the problem before ever being booted, which makes it 5 for 5), and the diagnostics always pegs them on the first test with a memory read/write failure.

 

If it passes the diagnostics then it's not the memory issue I speak of, and it's one less thing on your list. If it IS the memory problem, both cards will fail it with the same memory error.