im in need of a new Graphics card, one that can play Oblivion ...
ive orderd a new card, GeForce 7800 GT
Ouch, Hate to tell ya, a 7800GT isn't that good for Oblivion. It will play it, but you could have done better. I had one and quickly upgraded to a X1800XT as ATI cards do way better than NVidia in Oblivion.
Have a look for yourself:
Max details in th stressful outdoor foliage:http://www.firingsquad.com/hardware/oblivion_high-end_performance/page5.asp
High details in their gate benchark:http://www.anandtech.com/video/showdoc.aspx?i=2746&p=4
A X1950XT, X1950 pro or X1900GT would have been the way to go. Shoot, even a cheap X1650XT would have been better than a 7800GT for Oblivion. Plus these cards can all run FSAA + HDR at the same time, whereas with the 7800GT you have to choose one or the other.
Here is a nice X1650XT for $119 after rebate: http://www.newegg.com/Product/Product.asp?Item=N82E16814161049
Most games the 7800GT would win, but a few like Oblivion, the X1650XT would win.