is this OC'ing is good???

 
well , this VGA is for my old PC and when i compare it with my 8800GT i can say this it half of that in games
i can play crysis with medium setting on 1024 res. with good FPS(25-30)
I'll put my benchmarks ASAP
let me mention that it's a passive cooling VGA
if i replace the cooling system with a more powerful one may i push it higher than this clocks ???
 
hey guys
another thing
I'd looking XFX site for VGA and a strange thing
i can't find it !!!
8400GS 512mb with passive cooling
I've found 8400gs 256 fan less
and 8400gs 512mb with a little fan!!!
and mine is not there?
isn't it strange???