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SD vs. DDR

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Anonymous
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November 13, 2001 1:40:50 PM

Is there a difference between SD RAM and DDR RAM? If so, which is better when talking about an at home PC that is mostly used for games and internet browsing?

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November 13, 2001 2:10:25 PM

DDR transfers data twice as fast as its sdram counterpart.
If your going to get a ddr mobo and ddr sdram, you want to get pc2400 or pc2700 ddr sticks just to kind of future proof your ram. It doesn't cost very much more, if at all.

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November 13, 2001 2:42:11 PM

There are only two motherboards (Asus A7A266 & ECS K7S5A) that can use either SDRAM or DDR-SDRAM. All other motherboards use one or the other. You need to find out which your motherboard uses and get that.

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November 13, 2001 2:54:35 PM

well, you need a motherboard that will support a DDR RAM.

In general, DDR is twice as fast as SDRAM although it is a kind of SDRAM.

Actually, SDR is not Single Data Rate as Double Data Rate is (although technically it is) but Synchronous Dynamic Random Access Memory. DDR could be called as DDR-SDRAM more correctly.

Both cost almost as much so you could go for a DDR memory based board. Currently there are no DDR based Intel chipset boards available for intel processors, but you can get VIA Pro266/T, ALi chipsets and new SiS chipsets that use DDR for P3. DDR is now a de-facto platform for AMD chips.

In any case you could be better off with DDR RAM whatever your application.

girish

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November 13, 2001 2:58:51 PM

welll, Asus A7A266 is better (and still better if it has the ALi Magik1 rev C chipset), ECS K7S5A is cheaper.

But since you are going directly for DDR, you wont need and SDRAM support.

<font color=red>No system is fool-proof. Fools are Ingenious!</font color=red>
November 14, 2001 5:54:22 AM

For Intel P4 and AMD athlon/duron cpus, ddr is virtually 2x faster than sdr memory. For intel p3/celeron there is no difference, because these cpus have still sdr front side bus.
November 14, 2001 2:55:01 PM

Quote:
For intel p3/celeron there is no difference, because these cpus have still sdr front side bus.


Umm...sorry, but that's not right. If there is a DDR P3 platform (someone once said there was, but I've never seen one), then the memory would by definition have to run at double.

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November 14, 2001 3:11:58 PM

DDR on the P3 is useless because the FSB runs at 133MHz SDR.

AMD technology + Intel technology = Intel/AMD Pentathlon IV; the <b>ULTIMATE</b> PC processor
November 14, 2001 3:42:00 PM

True, but I've seen systems advertized with them. I still have yet to find what chipset it runs on though.

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November 14, 2001 7:06:51 PM

um, look at the ASUS TUA266...

AMD technology + Intel technology = Intel/AMD Pentathlon IV; the <b>ULTIMATE</b> PC processor
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