DDR RAM -- SD-RAM vs. DIMM

[Aegis]

I thought SD-RAM was a reference to AMD cpu compatibility, but I am looking to buy the following:

http://www.newegg.comProductProduct.aspx?Item=N82E16820231047

I matched specifications to the Asus board with a 2 GHz Intel Celeron, and want to make sure this is a correct choice to pair with the the Asus/Celeron 478 socket form factor.

I know I want 184 pin DDR (not DDR2 or DDR3, as they are not physically compatible with the Asus P4S800MX board.)

Thanks!

[JJ 3000]

The SD in SDRAM stands for Synchronous Dynamic Ram. DDR RAM is SDRAM, the DDR stands for Double Data Rate. Most Mobos use SDRAM. Most AMD and Intel boards use SDRAM. There are some that use RDRAM, but those are few and far between.

The link in your post  doesn't seem to lead anywhere (am i alone in this?)

as long as the new RAM will fit into your RAM slots on your board then you should be good to go. The speed of your RAM is important. The slowest DIMM on your motherboard will set the speed of the other sticks you add. They will automatically adjust to match the speed of the slowest one.

If you travel to http://www.crucial.com/ and let them scan your computer, they will tell you exactly what you have installed and what you can add. You don't have to buy from them but you can find the exact specs of the memory you need.

[nix1128]

Check other websites and they will tell you the type of ram you require and what speed they support.  I found your motherboard at the link below i think you cant go wrong with the pricing and guarantee they offer:

http://www.diahmemory.com/asus-p4s800-mx-motherboard-ram.html

[Aegis]

I was pretty sure I had it right, but I'd swear I saw ads that used SD-RAM and DDR to describe the same RAM.  I still say the DDR is for Intel processors, and the SD is for AMD.

[BC_Programmer]

I still say the DDR is for Intel processors, and the SD is for AMD.

Your silly. They are really different generations of memory.


SDRAM was used by both intel and AMD with the Pentium 1,2 and AMD K5,K6, and K6-2 years; mainly because it was top of the line, much better then the previous FPM memory (Fast page mode) which actually turned out to not be so fast.


Also, to prevent confusion in future searches, don't confuse SDRAM with SRAM, which stands for Static RAM, and is both very fast and very expensive (and thuse confined to the relatively small amount of L1 Cache)

DDR, as JJ described, is merely "enhanced" SDRAM, that is, they use the same core technology, with a few tweaks along the way, (and better motherboard circuitry, usually).

[Aegis]

So, how in the nine rings of Hades do we know what RAM to use on the newer boards??? 

[patio]

Check the MBoard manuals...

[smitty74]

I have machines that use both SDram and DDR. From my experience they are not interchangable the SDRAM slot has two alignment pins and the DDR has only one.  I am pretty sure the SDRAM is older.  Actually they are both on desktops that use Intel processors.

[BC_Programmer]

I have machines that use both SDram and DDR. From my experience they are not interchangable the SDRAM slot has two alignment pins and the DDR has only one.  I am pretty sure the SDRAM is older.  Actually they are both on desktops that use Intel processors.

their on motherboards of different shapes and sizes supporting both sides.

they are the same at the chip level (DDR uses SDRAM memory) but as far as form factor or compatibility, they definitely won't be interchangable.



Barring the usage of a Motherboard manual, Aegis, usually a Crucial scan will at least find out what kind of RAM you need.

[Dias de verano]

All PC RAM is SDRAM. (synchronous dynamic random access memory) Some is DDR. (double data rate) Some is SDR. (single data rate).

I think some people are getting confused between the terms SDRAM and SDR.

[Aegis]

Thank you all for the input.  I knew DDR was up to DDR3, but I guess I haven't kept up on the rest of it as well as I should have.