i know people that have gone WAY above 400 with that card...people do ultra speeds with that card easy ive seen it a lot on evga forums
-Antec 900 case
-Asus p5w dh deluxe 2206 bios
-2x1 gb GSKILL 6400 @ with 4-4-4-12 760mhz
-Intel E6400 2.13 @ 3.044ghz 380fsb w/ zalman cnps9500-led L626A472
-2 WD caviar se16 250gb raid 0
-OCZ GameXStream 700
-Creative x-fi xtrememusic
-Samsung 226bw "S"
-all on Vista Ultimate...
my 2006 m roadster is still faster though