dude we have so many thread on ATI X1800XT vs 7900GT

just use the search feature on this forum.
ATI :
Better IQ , HDR with AA , Great performance in Oblivion/BF2 , AVIVO encoder/decoder , Overall better performance 7900GT
Nvidia :
Cool , Consume less power and you can volt mod to crazy speed at the expensive of warranty.
Stock speed Benchmarking on high res with AA/AF :
http://www.firingsquad.com/hardware/nvi...rce_7900_gt_gtx_performance/page10.asp
Battlefield 2 2048x1536x32 4xAA/16xAF
X1800XT : 70.3FPS
7900GT : 31.7FPS
Quake 4 Ultra Quality 2048x1536x32 4xAA/16xAF
X1800XT : 49
7900GT : 40.1
Lock On Modern Air Combat 2048x1536x32 4xAA/16xAF
7900GT : 57.6
x1800xt : 47.9
Pacific Fighters 2048x1536x32 4xAA/16xAF
7900GT : 45.7
X1800XT : 41.5
FEAR 2048x1536x32 4xAA/16xAF
X1800XT : 25
7900GT : 20
Call of Duty 2 2048x1536x32 4xAA/16xAF
x1800xt : 23.2
7900GT : 16.7
Serious Sam 2 2048x1536x32 4xAA/16xAF
X1800XT : 36.9
7900GT : 34.5