bottleneck?

[r3g]

never since i built my rig ive noticed that i got way lower benchmark scores then those with the same rig as me.. im wondering if my motherboard is the bottleneck becuase i know its not my cpu. can anyone confirm this plz?

3dmark05 = 3462
3dmark06 = 1351
aquamark3 = 48,902
source stress test = 80.28



specs =

AMD 64 3000+ 2.3Ghz
Foxconn K8S755A
1536mb PC3200 (3x 512)
Gigabyte 6600GT @ 558/1160
P4 400watt

 

[defakto]

Vid card.

 

[r3g]

naw my card isnt performing at its best... people with the same specs as mine get way higher benchmark scores and the 6600gt in general get higher scores so this leads me to believe something isnt right in my system. in the futuremark forums most people are getting in the 1500-1600 in 3dmark06