Posted 29 December 2008 - 08:33 PM
The slowest ram you can use with that processor without bottlenecking it is DDR2 400mhz. If you're going to overclock though, getting faster is recommended. With the prices of 667mhz ram and even 800mhz ram these days, you might as well get at least 667mhz.
You want the fsb of your processor, divided by four (it runs in quad-data rate), to be equal to or less than the frequency of the ram divided by two (dual-data rate, DDR). That's why the minimum you would want your ram to run at is 400mhz when paired with an 800mhz fsb processor. It's a good idea to get faster ram than 400mhz so you don't bottleneck the processor, or overwork your ram overclocking it to not bottleneck the processor.
"I think there is a world market for maybe five computers." - Thomas Watson, Chairman of IBM, 1943