DDR 333

[Ruckas]

I've always had RDRAM. I've never had to play around with DDR. But my buddy wants to upgrade his ram. It says it's 333mhz. What does that mean? Could someone please explain the different speeds of DDR ram? I see there is 2100, 2400, 2700, 3000, 3200, 3500 and 3700 speeds. But where does 333mhz come in? And why?

Thanks alot, Ruckas-

 

[boyRacer]

PC2100 = DDR266
PC2400 = DDR300
PC2700 = DDR333
PC3000 = DDR375
PC3200 = DDR400
PC3500 = DDR433
PC3700 = DDR433

A 266 MHz DDR DIMM is called a PC2100 DIMM. On a 266 MHz DDR DIMM module: Each module is 64 bits wide, or 8 Bytes wide (each byte = 8 bits). To get the transfer rate, multiply the width of the DIMM module (8 Bytes) by the rated speed of the memory module (in MHz): (8 Bytes) x (266 MHz/second) = 2,128 MB/second or about 2.1 Gigabytes/second.