What's the difference between DDR PC2100, PC2700, and PC3200?

[biggiesmallz]

When should each of them be used?

Thanx

 

[DannyBoy]

They all run at different FSB's and have a max bandwidth of different amounts.

PC2100 = 266mhz & peak bandwidth of 2100mb's a second

PC2700 = 333mhz & peak bandwidth of 2700mb's a second

PC3200 - 400mhz & peak bandwidth of 3200mb's a second

Dan

 

[StraightPipe]

When should each of them be used?

ideally use the fastest in all situations, but money doesn'treally allow that.

 

[yhelothar]

PC2100 with athlons, unless you have barton or 2600+ you should go with PC2700
PC3200 if you want to overclock..

 

[Whitedog]

They all run at different FSB's and have a max bandwidth of different amounts

Has nothing to do with FSB. Memory Bus and Front side bus are two different entities.

example:
[CPU]<----{FSB@266mhz}---->[Chipset]<---{memory bus@333mhz}--->[PC2700]

just FYI.

 

[biggiesmallz]

Originally posted by: Whitedog

They all run at different FSB's and have a max bandwidth of different amounts

Has nothing to do with FSB. Memory Bus and Front side bus are two different entities.

example:
[CPU]<----{FSB@266mhz}---->[Chipset]<---{memory bus@333mhz}--->[PC2700]

just FYI.

So Whitedog you can still get the full benifits of PC3200 ram with a 266FSB? Since one has nothing to do with the other. Correct?

 

[JavaMomma]

Originally posted by: biggiesmallz

Originally posted by: Whitedog

They all run at different FSB's and have a max bandwidth of different amounts

Has nothing to do with FSB. Memory Bus and Front side bus are two different entities.

example:
[CPU]<----{FSB@266mhz}---->[Chipset]<---{memory bus@333mhz}--->[PC2700]

just FYI.

So Whitedog you can still get the full benifits of PC3200 ram with a 266FSB? Since one has nothing to do with the other. Correct?

You can still get benifits. The P4 loves lots of bandwidth.

 

[Whitedog]

Originally posted by: biggiesmallz

Originally posted by: Whitedog

They all run at different FSB's and have a max bandwidth of different amounts

Has nothing to do with FSB. Memory Bus and Front side bus are two different entities.

example:
[CPU]<----{FSB@266mhz}---->[Chipset]<---{memory bus@333mhz}--->[PC2700]

just FYI.

So Whitedog you can still get the full benifits of PC3200 ram with a 266FSB? Since one has nothing to do with the other. Correct?

I was just stating that FSB (Front Side Bus) is NOT the memory Bus...

Yes, you get benifits of having more memory bandwidth without it equaling FSB bandwidth... check out NF2 benchmarks with dual channel memory enabled.

I'm running 266MHZ FSB (2.1GB/s) now with Dual Channel PC2700 (5.4GB/s Bandwidth memory)... It makes a difference in some instances. Not huge amounts, but some.

 

[ElFenix]

Originally posted by: biggiesmallz

Originally posted by: Whitedog

They all run at different FSB's and have a max bandwidth of different amounts

Has nothing to do with FSB. Memory Bus and Front side bus are two different entities.

example:
[CPU]<----{FSB@266mhz}---->[Chipset]<---{memory bus@333mhz}--->[PC2700]

just FYI.

So Whitedog you can still get the full benifits of PC3200 ram with a 266FSB? Since one has nothing to do with the other. Correct?

it will make a difference in situations where memory requests exceed (usually by a lot) those made by the processor... so some other piece of hardware taking up a lot of bandwidth (AGP texturing comes to mind). sometimes you'll get worse performance since running async requires additional waits and things by the northbridge to line up requests from a 266 MHz CPU bus to a 333 MHz memory bus.

 

[Shimmishim]

this is an interesting read....

is there really a point for people with p4 'b's to even use pc3200 and higher?

considering that the p4 2.4b is running at 18 x 133, people are getting around 3.4 ( 18 x ~ 190) what's the point if you run it under spec?

that's just my opinion...

 

[0roo0roo]

apparently it makes a big difference for p4. i think tomshardware or some other site did a test.

 

[bgeh]

now, dual PC3200 is still a novelty item
but when intel releases it's 800MHz FSB chips, Dual DDR 400 will become more and more mainstream

 

[BentValve]

What's the difference between DDR PC2100, PC2700, and PC3200?

not much.

 

[0roo0roo]

http://www6.tomshardware.com/howto/20030224/index.html

 

[Challenger]

Linked