amd and ram speed

[gramberto]

I was looking at AMD processors/motherboards. It looks like the highest speed RAM that AMD and Socket 939(which I believe are the top of the line boards) can handle is PC4000 right? Everything above that including DDR2 is only usable by Intel right?

 

[TheRyuu]

Technically, AMD doesn't officialy support anything above DDR400 memory. To reach anything over DDR400, you would have to either increase your bus speed (HTT speed) or use a memory divider. I'm pretty sure that OCing is the only way to use DDR500 ram on AMD.

 

[Fallengod]

Yeah im not sure how you would expect to use PC4000 memory with stock settings Its meant for overclocking. But NO to your question. The limit would be whatever speed the motherboard would support. PC4000 isnt the limit. My memory is pc4400 tccd. It can do up to 320mhz. Its dependant on the mobo and mem. There is no 939 limit as far as I know. If there is, its well beyond the speeds most people would use anyways.

 

[5t3v0]

Socket 939 only supports 184pin DDR ram, DDR2 is 240pin & only supported by Intel currently. The fastest DDR ram I've seen available is the Corsair XMS4400C25PT PC4400 rated at 275Mhz or DDR550 in 512Mb sticks. In 1Gb sticks, PC4000 is the fastest I've seen. As the guys have already said, to get to these speeds you have to overclock the cpu & have a compatible motherboard.