Problem with output

[Marsh]

Hi
I've just got a new pc with a geforce 6700 XL.
The upper right hand corner of the screen has got a few pixels that dont display correctly (see attached).
I've ruled out the monitor, i can screenshot the problem and if I drag an active window over the affected area it leaves a trail.

Anyone got any ideas? I've looked on the nvidia website for new drivers and this card isn't supported yet.

Thanks

Edit: the pic doesnt show anything as it is, its 50 ish pixels that are in an inverse colour, I'll see of I can capture it any better

 

[Marsh]

New image, should be plain black screen. On actual display this is 20x5mm ish. only happens in 32bit colour.