DDR2 667 to 800 - Big Deal?

[FreshPrinceOfBellAir]

I have not worked with Intel for a while and would appreciate your help. Will running 800 ram over the 667 be any advantage on a Presler rig. I remember the older P4 liked fast memory??
Thanks

 

[(cf)Eclipse]

if you ran your fsb at 400mhz (1600fsb), the difference between ddr2-667 and ddr-800 would be much larger...