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Help with agruement...

M

Myzhi

Limp Gawd
Joined
Oct 25, 2002
Messages
143
"Most Mobos take a max of ddr 400 ram. so lets do the complex math needed to figure this out. hmmmmm boy this is tough, wait its coming to me. YES I got it. 400 is the max so ANYTHING above 400 is a waste of my time. If you run to the store and buy ddr400 ram and then come home and try to OC it you will be dissapointed. and I dont mean changing ras to cas or precharge delay or any of that crap. Im talking about running the actual mhz higher than 400. "


True or false? Can MB take advantage of faster then DDR400?
 
Yeah, I use PC3500 in my mobo.

Mobo manufacturers only officially support PC3200 (DDR400) speeds max. The JEDEC spec, I think, officially qualifies PC3200, but any RAM faster than that is not in the spec (?), but they are, so to say, "backwards compatible" and can run at slower speeds.
 
Originally posted by BillLeeLee
Yeah, I use PC3500 in my mobo.

Mobo manufacturers only officially support PC3200 (DDR400) speeds max. The JEDEC spec, I think, officially qualifies PC3200, but any RAM faster than that is not in the spec (?), but they are, so to say, "backwards compatible" and can run at slower speeds.
Click to expand...


Think need to clarify even more. What the guy was saying is that even if you use DDR533 and overclock, you won't get any performance gains from it because MBs only officially support DDR400. Thus, your DDR533 will only run at DDR400 speeds.
 
if you are OCing, then yes it should. What you are thinking of is if the chipset/etc can run DDR400 right out of the box. Even if thats the case, if you push the chipset beyond that it will should take advantage of it. As long as nothing strange happens.

Originally posted by Myzhi
"Most Mobos take a max of ddr 400 ram. so lets do the complex math needed to figure this out. hmmmmm boy this is tough, wait its coming to me. YES I got it. 400 is the max so ANYTHING above 400 is a waste of my time. If you run to the store and buy ddr400 ram and then come home and try to OC it you will be dissapointed. and I dont mean changing ras to cas or precharge delay or any of that crap. Im talking about running the actual mhz higher than 400. "


True or false? Can MB take advantage of faster then DDR400?
Click to expand...
 
Oh, I see what you're getting at. The reason why you use higher rated RAM is to get a higher memory overclock. It's easier to get a higher speed out of higher rated memory, although RAM higher than PC3500 will have much looser timings.
 
You can absolutely take advantage of faster memory than 400 Mhz. If your CPU will handle higher than 200 FSB, you can raise the FSB so the memory will also run higher than 400 Mhz.

Example: PC4500 memory in an NF7-S with a Barton 2500+
If the CPU will let you hit 220 FSB, the memory will be running at 440 Mhz.
If you can get it to 250 FSB, then the memory will be running at 500 Mhz. Still not the max rated speed of the memory, but well above the Barton's rated speed. Using high speed ram like that will insure that any OC limitations will not come from the memory.
 
"Can MB take advantage of faster then DDR400?"

It depends on the motherboard. It is true for some, false for others.

Can every MB take advantage of memory faster than DDR400? No.

Are there any MBs that can take advantage of memory faster than DDR400? Yes.
 
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