Simple the topic says it all, i think it may have to do with my graphics card being new......
here is my specs,
AMD phenom II X4 840t
8 gigs of ram
HD radeon 6950
windows 7 (probably the problem)
is my video card just too new for oblivion or what?...no mods either
also its updated to the latest.....everything is, oblivion drivers direct x, ect
it works great with my 6850 which is a new card, so i dont think its your gfx card. more likely the quad core. You can set the processor affinity to use 2 cores, cant remember how but jsut do a goocle search.