Is this my GPU or monitoe?

[Barso]

I am running a sapphire 4870X2 and a samsung 2443BW.
I am having problems with the display reverting back to a lower resolution and also when I run 3D MARK VANTAGE I cannot get past the first benchmark,jane nash.
It is showing large grey streaks running up and down the screen.

 

[95thrifles]

Has this just happened? Or has it developed slowly?
Is it a new build? Or have you changed anything of late?
When does the res revert? A particular time when you do something? Or randomly?
Whats the rest of your system spec? Incl any OCs?

 

[Barso]

It's just happened.
It's a new build.i7920 OC'd to 3.2GHz.
4870X2 GPU not OC'd.
I have changed the bios settings so that everything is on auto apart from the BCLK at 180,CPU Voltage 1.25,DDR3 1604MHz with timings of 9-9-9-24, DDR BUS voltage 1.6.
There were a lot of changes that I felt were to high for an overclock of 3.2GHz.
The IOH was at 1.4 for example.

 

[Barso]

When it reverts I cannot get it back unless I do a system restart.

 

[95thrifles]

Id suspect its the GPU then tbh, do you have your old one you can test just to confirm?

 

[Barso]

This is my only one,it came with the build.
To be honest I am replacing it with a GTX295 tomorrow.
What is the best way to get rid of the ATI drivers?
Thanks for the help.

 

[95thrifles]

uninstall using add/remove programs
download driversweeper
reboot into safe mode (hitting F8)
run driversweeper
reboot into normal and install new NVidia drivers

 

[Barso]

Thanks,much appreciated.

 

[mame]

Ok bit of a longshot but: I have that monitor. Before that I had a 2032BW which I sold on here. When the buyer came to pick it up I set the PC up on the 2032 for him to see. I dont think windows liked that both of the monitors were called 'Samsung Syncmaster" and even gave me a couple of bluescreens. When I went back to the 24" screen, windows kept starting up in 1680x1050 untill unistalled "Samsung Syncmaster" only to replace it with "Samsung Syncmaster" If you see what I mean.