I have since upgraded my pc several times and while I still have the same CPU, I have a better Graphic card and way more memory. I installed Oblivion today and started up, and the game said it didnt recognise my hardware and will set the detail to medium. The graphics underground were ok, though not perfect even with all details to max in settings. Got outside and the view of the riverbank on the other side looks terrible. I installed the 1.2 patch and now I have purple tiling for grass though everything else looks ok.
My PC spec is...
AMD X2 6000 at 3 ghz
8 Gig ddr2 ram
Nvidia 260GTX
160, 320 1TB HDD's
Windows 7 premium 64Bit
Direct X 11
All drivers are upto date