What is the difference between PC100/PC133 and Rambus?
Rambus memory modules use an entirely different electrical interface than PC100/PC133 modules. PC100/PC133 modules transfer data at 100 (133) MHz over a 64 bit wide interface (72 bits when using error correction). Rambus modules transfer data at 800 MHz over an 16 bit interface (18 bits when using error correction). Rambus is capable of transferring data at twice the overall rate of PC100 modules (the clock is 8 times faster and the interface is 1/4 as wide). What is Double Data Rate SDRAM? Double data rate SDRAM transfers data on both rising and falling edges of an applied square wave shaped clock signal. Therefore, a PC266 DDR memory module can transfer data twice as fast as a PC133 SDRAM module.
