Picking 800MHz FSB over 667 when memory supports 667?

[digitron]

Hi,

I have a choice between:
Intel® Core™ 2 Duo Processor T5800 (2.0 GHz, 667 MHz FSB, 2 MB L2 cache)

and
Intel® Core™ 2 Duo Processor T8100 (2.10 GHz, 800 MHz FSB, 3 MB L2 cache)

but to work with the following memory:
2048MB 667MHz Dual Channel DDR2 SDRAM [2x1024]

Since memory supports only 667MHz, is there sense in taking 800 MHz FSB processor?

I know other components use FSB too, but will I see any noticeable difference in performance if I pick 800 MHz FSB processor over 667 MHz one?

Thanks

 

[SirCrono]

The FSB is quad pumped and the RAM speed is doubled, in other words, the 800 MHz FSB is just at 200 MHz (it's 800 MHz effective as it transfers data 4 times per clock) and the 667 MHz memory is actually at 333 Mhz.
So the 800 MHz FSB CPU wouldn't be bottlenecked by the RAM.

Also the 800 MHz one will be faster due to: higher clock, bigger cache and higher FSB (meaning more bandwith between CPU and RAM).

 

[digitron]

I see.
That makes sense.
Thanks for the great reply!

 

[wonderingwhatis]

Also I believe the 5xxx series are all 65nm manufacturing, where the 8xxx are 45nm.