6600 Higher FSB=Lower Performance?

[SoniCraze]

evga 680i
e6600
Cosair 8500c5
(air)

400x9 @ 3.6ghz
Memory @ 1066
vs
449x8 @ 3.590ghz(or close)
Memory @ 1066

I get about 500 less points in 3dmark05 with the fsb @ 449 vs 400.

Everest
400x9
Memory Read - 10700 MB/s
Memory Latency - 48
L2 Cache Latency 3.1

vs

449x8
Memory Read - 8900 MB/s
Memory Latency - 80
L2 Cache Latency 4.6


Ive had these exact same results with my old motherboard (abit ab9 pro) and this evga 680i.

Is there some key step im missing with my over clocking process? Why does the higher fsb result in lower performance?

Thanks guys.

 

[Zero82z]

It could be one of two things. Your motherboard may be defaulting to looser timings at a higher FSB level, which would give you less bandwidth. It could also be that the motherboard uses a higher strap past a certain level(for example, the ASUS P5B goes to a higher strap past 400FSB), which basically lowers bandwidth in return for lowering stress on the chipset so you can hit higher FSB levels. Either way, if you've hit the max of your chip at 400x9, I suggest you keep it that way. That's a good clock for an E6600, and it seems to be getting you the best performance.

 

[Brahmzy]

Stick with the 400x9. These things seem to run better at stocks multi's.

Mine loves 400x9 and that's where she's stayin'.