IMHO, pc3500 is OVERKILL with GB chipset. To be honest, pc3200 is over kill as well. The memory is running in sync with the fsb. There are not dividers with GB chipsets. My corsair 3200 stick is running rock stable at 3:4 174fsb. That is 232mhz or DDR464 no sweat, this is at cas2-3-3-6. Of course I am interested in seeing what the limits of the ram is at say 2-2-2. This would be the only reason I could see a benefit in faster ram. The trade off of the higher price for the chipsets is supposed to be the ability to use cheaper ram in dual channel.
Buzzdog