I use
this site for comparing GPUs. You'll find it there.
The 8800 GT was one of the most powerful cards (arguably THE most powerful) released in the GeForce 8 series. My system is actually equipped with two of them in SLI configuration (though I force single-GPU on Oblivion because it doesn't support SLI)
Here's their entry on the card:
http://www.gpureview.com/show_cards.php?card1=544&card2=There's also this table here on the Bethsoft forums listing how capable specific GPUs are at running Oblivion. You'll find mine is listed under the "Extreme" category.
Rest assured my system is perfectly capable of handling what I'm throwing at it.
This post has been edited by Thomas Kaira: Feb 1 2011, 09:53 PM