I think my GFX is bottlenecking my i5

[Guest Vincent]

I have the following system:i5 @ 3.78Ghz (180*21, 1.29v)BFG 8800GT OC 512MB8G OCZ DDR3 1600Mhz Gold Low Volt running 1080SATA Seagate 160G SATA W7 64I have my FSX tweaked with Nick N's but I still got some lag especially in large city like RJTT. I have my scenery set to high with very dense scenery complexity and dense auto gen. I also have REX2, GEX, and ASA running. I'm flying at 1280*1024.I took off in my A2A J3 at RJTT and it was REALLY lagging even though the FPS is showing 30 (Set to unlimited and use FPS limiter to 30) with occasional drop to the teens. But it just doesn't feel like it's running @ 30 FPS at all! I have tried lower the autogen to normal but without much help. The only way that SEEMS to help is to lower the res to 1024*768 or turn on DX10.So, here are my questions:1) you think my GFX is the bottleneck?2) I'm looking at getting either GTX 260 or HD 5770. However, seems like most people are talking about the 285 or the 5870, both of them are really out of my price range.3) If I do get the 5770, Can I still somehow turn on the AA, like what I do with nhancer?Thanks a lot!