What is the fastest DDR memory?

[astroruben]

Is it Corsair XMS series PC3000 with CAS2.0 or PC3200 with CAS2.5? To be used on Asus P4S533. If BIOS latency settings for PC3200 need to be changed then it should not affect system stability. 256MB stick.

Thanks.

 

[10GHZ]

then i would say, pc3200 cas2.5

 

[lhgpoobaa]

they use exactly the same chips and PCB's, just that the PC3200 cas2.5 is tested at 400Mhz

so in a pure Mhz sense this is one of the fastest ram types around, only other PC3200 i know of is stuff from Kingmax, and i aint seen any in shops.


<font color=blue>All religions are true, for a given value of 'true' - Terry Pratchett.</font color=blue>

 

[eden]

Problem is I didn't see many succesful CAS2 DDR400 sticks yet. I recommend going for PC3000 with CAS2 already, it'd kick the 3200's ass for sure.

--
Intel and AMD sitting under a tree, P-R-O-C-E-S-S-I-N-G!

 

[astroruben]

Not even PC3200 from Corsair?

 

[lhgpoobaa]

no
the corsair is cas2.5
cas2 @ 400mhz may be possible... but u will need higher voltages... on the limit of overclocking

<font color=blue>All religions are true, for a given value of 'true' - Terry Pratchett.</font color=blue>

 

[j0n_d4w6]

Buy whichever is cheaper. These two modules are really close to each other in performance. As a matter of fact, many PC2700 2.5 CAS chips are slower than PC2100 CAS 2.0 chips! This becomes more true as the speed increases. One of the reasons the new Northwoods run quicker than the Palominos or Thoroughbreds is because of the Northwoods' larger cache size. The same can be true for memory. PC3200 w/ a 2.5 CAS is relatively equivalent to a PC3000 2.0 CAS chip. I recommend getting the cheapest stuff. Here are some prices I pulled off of www.pricewatch.com:

PC3000 2.0 (Samsung) $69
PC3200 2.5 (Kingmax) $61
PC3200 2.0 (OC System) $79

I hope you'll also aware that you'll have to overclock the board to make full use of the bandwidth of PC3000/3200 RAM. The board can take it, easily, but it is a consideration.

 

[AMD_Man]

I hope you'll also aware that you'll have to overclock the board to make full use of the bandwidth of PC3000/3200 RAM. The board can take it, easily, but it is a consideration.

Actually, that's not true. The P4S533 includes the appropriate FSB to Memory ratios to run the RAM at 400MHz WITHOUT overclocking.

<b><i>"A penny saved is a penny earned!"</i></b>

 

[buddry]

But who here wouldn't want to overclock?

That is a nice <b><font color=green>Garbage Can</font color=green></b> you have there!

 

[FatBurger]

I'd never overclock, my high school teacher said it hurts the processor.

<font color=blue>Hi mom!</font color=blue>

 

[j0n_d4w6]

Actually, that's not true. The P4S533 includes the appropriate FSB to Memory ratios to run the RAM at 400MHz WITHOUT overclocking.

Really? Asus advertises it as a DDR333 board, which Intel doesn't even official support, yet. So, in order for Asus to get PC2700 in it, they had to use the SiS645DX chipset, based on the 845G (is it the 845G chipset? I could be wrong about that) from Intel. Since DDR333 runs @ 333 MHz and the FSB is 133 (true bus speed), the ratio would be 4:3. If the memory were to run @ 400 MHz (i.e. PC3200) then your ratio would have to be changed to 3:2... <i> that's </i> overclocking! Unless they've changed the name for it in the last few weeks. Pushing the board up to DDR400 speeds is overclocking it above its original specs. Just click on the link below and you'll see. SiS only validates the supported memory for their chipsets.

<A HREF="http://www.sis.com/ddr/ddr_validation.htm" target="_new">http://www.sis.com/ddr/ddr_validation.htm</A>


- Jon

 

[AMD_Man]

Really? Asus advertises it as a DDR333 board, which Intel doesn't even official support, yet. So, in order for Asus to get PC2700 in it, they had to use the SiS645DX chipset, based on the 845G (is it the 845G chipset? I could be wrong about that) from Intel. Since DDR333 runs @ 333 MHz and the FSB is 133 (true bus speed), the ratio would be 4:3. If the memory were to run @ 400 MHz (i.e. PC3200) then your ratio would have to be changed to 3:2... that's overclocking! Unless they've changed the name for it in the last few weeks. Pushing the board up to DDR400 speeds is overclocking it above its original specs. Just click on the link below and you'll see. SiS only validates the supported memory for their chipsets.

But the SiS 645DX DOES indeed support DDR400 but it hasn't been officially acknowledged, just as the 845G supports DDR333 unofficially.

It's not overclocking when you have RAM that's designed to run at 400MHz. Then nothing will be out of spec. Everything will be running normally.

<b><i>"A penny saved is a penny earned!"</i></b>

 

[eden]

Intel's mobo allies have begun some kind of mutiny against Intel. They are sick and tired, just like me, of the way they don't push the memory technology further. I mean PC1066 was so close to get wide support, and then they cancel the support on i850E! Then you have new Dual Channel boards coming as well as new DDR boards, and Intel stays with DDR266 or 333, barely itching 333.
Now the companies are tired of this and are beginning to follow enthusiasts' needs more than the locals.

--
Intel and AMD sitting under a tree, P-R-O-C-E-S-S-I-N-G!