EVERYONE almost is saying even with a dual core MAXED overclocked system with the best video card and 2 gig of ram its choppy and slow as hell.
It's just BAD programming and design. There must be a memory leak too.
And I can run Battlefield 2142 with all setting MAXXED, and that game has higher requirements than Oblivion!
This is one big reason PC Games are dying. Dev's release unfinished crap....