People having problems running oblivion at max rez:
I just discovered this 'tweak'...the 'fade' sliders in Video tab which make the most difference in cities: 'Actor', 'Object', and 'Item'...put 'Actor' on about 40%, and the other two on around 25-30% and this makes a HUGE difference in cities (haven't been outside, yet) without a whole lot of visual 'pop-up'...I mean, you CAN see things coming into existence as you move forward, but it is a very subtle 'shimmering' that you won't really notice unless you're looking for it! I haven't tested this outside, as I just 'discovered' it last night and I'm too busy to play today (the wife thinks I'm writing business emails right now, heh)...you can check it out on yer own, though.
I now run at 1920x1200 w/every other slider maxxed out, AF set at 16x in the driver panel, and HDR turned on in-game...before jerking those sliders down, I was getting 12-25 FPS even at 1440x900 when in cities (I also have a mod loaded that adds tons of random NPCs/Adventurers/Children wandering around)...now, I get 27-50 FPS@native rez...pretty handy stuff.
I was getting really frustrated with the framerate, as you can probably imagine, and I just thought of it as 'a terrible sin' to adjust any in-game settings downward after having spent tons of $$ on this rig and overclocked the piss out of it...I was convinced that ANY loss of image quality was intolerable, and simply didn't consider that the dev team had implemented these tools so well...as soon as I slammed all my settings to 'default' in frustration, I immediately noticed these three sliders had the biggest impact on frames and negligible effects on image quality/immersiveness. I now find it rather insane that I hadn't considered setting those sliders at anything less than 'MAX' before, and instead was constantly changing resolutions, swapping drivers, pushing an overclock even higher, etc. etc. to try and fix the issue! Jeez, I'm a moron....anyhow, the moral is, don't be afraid to use all the tools Bethsoft provided when deciding for/against a given resolution; as Emeril Lagasse is fond of saying 'That's why they put knobs on these things with more than one setting!'