What RAM to get to overclock the Athlon 64 3000 and Asus k8v/

[KAMAZON]

I was looking at some 'value ram' from corsaire, for $88.00 you get 512mb cAs 2.5 400Mhz (ddr 3200). i was wondering if I needed better or faster ram to overclock my new system that will be comming in. Thanks!

 

[nycxandy]

No, you can always use a mem divider of 5:3. However, it is best to run your memory speed at the same as your HTT.

 

[KAMAZON]

Originally posted by: nycxandy
No, you can always use a mem divider of 5:3. However, it is best to run your memory speed at the same as your HTT.

soryr, what do you mean by a mem divider of 5:3?

 

[eno]

Say for example your processor ran at 400mhz bus speed. Which is the 5 in the ratio

Then you got memory that only could handle 400mhz tops but your your CPU could hit say 450mhz, then you could use the divider to allow full speed of the CPU overclock while keeping your memory within its capable range. Memory being the 3 in the ratio.

so a bus speed of 400mhz with a 5:3 ratio would be 400mhz cpu(5) and 240mhz memory(3).

Sorry I know that isn't the best way to explain it. ANy others wanna try?

 

[imported_michaelpatrick33]

AMD CPU's run off a 200Mghtz frequency range. So a AMD 64 3400 running at 2200 is recognized by a 200 X 11 number internally. It is no longer a front side bus becuase of the integrated memory controller inside the cpu however. The hypertransport (the interconnect speed between the CPU and northbridge (not the same as PCI or PCI-ex) runs at 200 x 4 for a total of 800Mghrtz DDR(in 940, 754 chipsets and rise to 1000MghrtzDDR for a effective [or marketing depending on your perspective] 2000DDR which is why you often see 1600Mghtz front side bus (kind of a marketing gimmick). When you overclock you raise the first number [200] in the bios (unless you have the FX series of AMD64 CPU's which is completely multiplier unlocked) so to get 2320Mghtz from the AMD 64 3400 you would raise it to 210 X 11 in the bios. However, the memory is tied to the hypertransport and is now running at 210Mghrtz for 420total. Depending on your memory quality level (and whether your chipset has a AGP and/or PCI lock, another thread), you will get higher or lower numbers. The divisor comes into play when you try to get the CPU at a higher speed while keeping the memory closer to its native speed. So you would get 250 x 10 (notice you can lower your multiplier and assuming you have a good overclocking motherboard)AMD64 3400+ CPU to 2500Mghrtz (if you have good cooling and a good cpu) but run a 5:4 memory divisor to get 200Mghrtz or DDR400 native speeds on the memory. I hope this helps

200 x ? = ddr400 memory
210 x ? at 1:1 ratio = ddr 4** memory with the ** being higher than 400
250 x ? at 5:4 ratio = ddr400 memory