I know my old systems had SIMM or DIMM memory modules, But I am a little confused about the new types of RAM.

I heard that DDR is only for the Gigahertz boards with AMD processors. What is the correct name for the memory used in Pentium 4 computers? RIMM or RDRAM. I have heard it called both. I hear that it is important to knwo the difference...

Thanks,
mbm98...

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DDRSDRAM = Doublb Data Rate Syncronized Dynamic Random Access Memory for AMD Tbird + Spitfire

Rambus Inline Memory Module = RIMM
Also Known as Direct Rambus for P4

Both these types of memory are 184pin.

Lost of motherboard manufactures are making motherboards for both types of RAM.


You also have to take into consideration of speed of RAM I belive that there are two speeds for each of the above types of RAM

rambus = 600 + 800 I think, not 100% sure ?

DDR = pc1600 + pc2100 this is not the speed but type. I think, not 100% sure ?

I would say Rambus if I wanted to buy that type of RAM also the the type 600 or 800


Also I belive you need something in empty RIMM slot a bit like a blank to make pc work?

hope this helps

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Just a few side notes.. Rimm doesn't stand for Rambus Inline Memory Module.. Its just plain O'l Rimm... Kinda stupid I know, But they want to protect them selfs from copywriting.

Also, rambus runs at 16 bits (2 bytes).. not 64 (8 bytes) like DIMMs, but they normally run at 800 Mhz (2x800=1.6 Ghz) So thats what makes it faster than ordinary ram.

DDR just runs at twice the clock rate.

Oh Yeah, The extra slot a rimm needs if you only have one stick is called a C-RIMM (C being for Continuity-RIMM)

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be careful with this, rimm is just a memory mounting meathod, just like simm and dimm, the actual memory types are SDRAM, RAMBUS and so forth, there might be a trick question like that on the exam.

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Thanks guys for putting me straight
other than that I was not far out.

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