Just out of curiosity, what computers do you guys use? Because tmy Xbox runs more smoothly and has better graphics than my computer usually.
CurrentProcessor: AMD Phenom 2 720 x3 OC'd at 3.2 GHz (stock is 2.8)
Video Card: NVidia Geforce GTX 470
RAM: 4 GB DDR2. Forgot the speed. Somewhere between 600MHz and 800MHz iirc.
HDD: Western Digital 1 TB. Can't remember the specs.
S'about all that's worth mentioning. Runs the game without lag with several graphics enhancing mods at a resolution of 1280x1024. Occasional stutter when loading new areas.
Edit: Like Starforce9, I built this one myself.
I used to run Oblivion on this setup:
Processor: AMD Athlon64 3500+ (2.2GHz)
Video Card: ATI Radeon x1600
RAM: 1 GB DDR2. Never found out it's clock speed.
HDD: Some 200GB harddrive.
That would run the game perfectly on medium with resolution 1024x768. Could also run it on high, but it lagged alot in the wilderness, especially in forests.