Well, u have a pretty old version of a B-type CPU.. I dont think that even fits the minimum system specs, and even though GPUs matter far more in games, u cant take the Brain of ur PC too lightly, i mean it does do a fair ammount or else u wouldnt need it.
Not to mention that an X850 wouldnt be that great on Oblivion. Youd only be able to run it on Medium+ anyway, so why not just get a less powerfull CPU in 4 months and get a better card now, such as the X1900/X1800 or perhaps something from Nvidia, like the 7900 GT. Those are the only cards worth buying now adays anyway. I mean 64-bit sucks and u can do with a few CPU cycles less.
cant do that. im still on agp, as i will also be playin COD2 and Splinter Cell: CT on it when i get that X800XL (those games i've held off playing, too, till i get rid of this 9600xt). So, question stands, at least for you: would you start playing Oblivion on a Sempron 2400+, X800XL system in 2 weeks, or wait for an Athlon64 3500+, X800XL system in more or less 4 months then stat playing Oblivion?
Yeh, i know what ur question was and im at the same place u are now.. except i have a good CPU. So what im going to do is buy a new Motherboard wich PCI-E and but the X1900XT/7900GT because buying anything else isnt worth my money. Its like HDDs, or anything that comes in quantity for that matter, u pay less for every extra GB, so that buying a 250GB HDD is better then buying a 160GB HDD.
But if u want an answer, then play it now, because it will probably be the same now and in 4 months.