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DDR to FSB question

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June 8, 2003 11:14:33 AM

I just finished reading the DDR 466 article recently posted and I had a question. I am running a Asus A7v333 board with a xp 2100 on it, as well as DDR 2700. I was wondering since the processor fsb is 266 and the Ram is 333,(thats what they are set to in the bios as well)if they are creating a lag? I am asking this since the article discussed a FSB:RAM ratio. would this suggest that the ram should be set to 266 to give it a 1:1 ratio. TIA

More about : ddr fsb question

June 9, 2003 12:15:59 PM

Yes 1:1 is ALWAYS better than asynchronous operation. If you want to find out for yourself then run a few benchmarks in 1:1 mode (3Dmark and some memory benchmarks) and then choose the 4:5 options in the bios of your board and see if you can spot the difference in the scores.

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June 9, 2003 1:13:47 PM

What if you were to run your memory twice as fast as your FSB? (possible?) Say you use a Duron with DDR400? Is that considered to be in sync? Offer better/worse performance over DDR200?
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June 10, 2003 4:46:23 AM

You would be at 1:2 and no, it wouldn't be better because the best is 1:1. (Pretty much- for every tick of you CPU you would have 1 empty tick in your ram for the best explaination). Plus you would burn something out in my opinion.

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June 11, 2003 7:40:20 AM

No, it might always be better on HIS system, but it's not always better!

Look at the Asus P4S533 as an example. Running your P4 2.4A sychronously would make your memory run at PC1600 speed! Since it's single channel and the CPU bus is QDR, you would ideally want the RAM to run at 200MHz, aka PC3200 speed, aka 2x CPU bus speed! But this is unsupported by that board, it DOES support running PC2700 speed, asychronously, much faster than PC1600 speed sychronously.

You see "always" is "never" a good term to use!

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