I'm so confused about KT333 & ddr333 ram & fsb!

[Quad]

could someone please clarify this for me:

so kt333 can run at 166 mhz fsb no problems. ddr333 ram will run at 166mhz fsb no problems.
but Athlons are 133 fsb. so i buy an athlon and a kt333 mobo, this means i'll have to lower the multiplier in order to run both my ram and fsb at 166mhz right?

secondly, what if i get ddr266 ram....just some good pc2100 ram. if i put this in a kt333 mobo, can i run the fsb at 166 and the ram at 133 (different speeds) ? or should i keep the fsb and ram sychronous and try to raise the fsb as much as possible (say around 150mhz)?

so confused! 🙂
thx in advance

 

[jiffylube1024]

Originally posted by: Quad
could someone please clarify this for me:

so kt333 can run at 166 mhz fsb no problems. ddr333 ram will run at 166mhz fsb no problems.
but Athlons are 133 fsb. so i buy an athlon and a kt333 mobo, this means i'll have to lower the multiplier in order to run both my ram and fsb at 166mhz right?

secondly, what if i get ddr266 ram....just some good pc2100 ram. if i put this in a kt333 mobo, can i run the fsb at 166 and the ram at 133 (different speeds) ? or should i keep the fsb and ram sychronous and try to raise the fsb as much as possible (say around 150mhz)?

so confused! 🙂
thx in advance

I'm pretty sure the FSB and CPU share the same speed. I think that the KT333 runs all current Athlons at 133 MHz FSB and 166 MHz (DDR) memory . This would be an asynchrous 5:4 (memory:fsb) setting. I guess the KT333 Also supports a 1:1 ratio, which would be used for 166 FSB MHz Athlons (which don't exist yet).

If you get DDR266 memory (PC2100) then I believe you'll also be running a 1:1 memory ratio, which would be 133 MHz FSB and memory.

 

[CrazySaint]

At stock settings, KT333 motherboards will run the chip at 133FSB, but offer the option to run asynchronous with 133FSB/166MEM or synchronous with 133FSB/133MEM. The only "real" advantage of running PC2700 on an Athlon XP system is so you can OC without running into memory issues, because the performance increase from running the RAM at 166 is negligable. I know that good PC2700 RAM (Samsung, Corsair, Mushkin, etc) can hit 200+MHz speeds (DDR400+) without much trouble, so I imagine you *could* run good PC2100 at PC2700, if you wanted.