Will i get decent fps with a sempron 3400+ 2ghz and 2gb ram and an 8800gs
http://www.newegg.com/Product/Prod [...] 6814150294

It should play fine. I recently started playing Oblivion again. Using Qarl texture 3 maxed everything with 2xAA @ 1440x900. Around 40-50fps average.

Though you have a nice GPU and RAM...your CPU would bottleneck the gaming performance. Right now searching for benchmarks... gimme a little time.

I did alot of oblivion testing with that same 8800GS. It will handle Oblivion at max details far better than your Sempron 3400+ will. 1280x1024 2x/16x or 1600x1200 no fsaa are both possible throughout the game at max or near max details. With a single core CPU, you'll have slower minimum fps outside, and worse performance in towns around large numbers of NPC's. You may have to reduce some settings from max.

I would go for it, if you want COD4, it's incredible value for the money. If not for COD4, I would say go for the evga for $100 AR. It is clocked higher and has a better cooler with a variable speed fan vs the XFX constant 100% louder fan.

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cpu is a bottleneck u could overclock for better fps.

will an AMD Athlon 64 4000+ 2.4 GHz help get better fps?

Only time my frames seem to dip into the 30's is when it starts snowing. I'm using natural environments and weather. Other wise foliage area I hover 40-50fps and indoor areas are locked at 60 fps because I'm using vsync.

I think you should be fine with oblivion. I was playing oblivion on 850xt on a pentium D 3.5ghz when I first got the game. A sempron isn't too far off at least when overclocked and 8800gs will make it so much smoother. Oblivion doesn't really use dual cores effectively. That card without HDR @ high settings gave me 20 fps outdoors. You don't need a lot of fps to play oblivion since it's a role playing slash game. All you really need is 30fps average to get fluid game play.

so you think i should get pretty good average fps with the sempron?

Didn't I just say that? you should be fine. You won't fly like core 2 duo but it will play fine.

srry didnt see your top reply.....

Do not buy another single core A64. Play it on yours, see how it goes.

Your computer should play oblivion fine...I play oblivion with my current rig (at 1280x1024) and don't have any issues whatsoever...

my opteron 165 @ 2.25 with a 7800GT OC ran oblivion near max details with 1280 X 1024 resolution. So, I think your sempron should do fine at high settings considering the 8800GS is far more powerful than my 7800GT