RAM

From WikiPaul - Paul Swanson's wiki

DDR1

Standard name	Memory clock	Cycle time	I/O Bus clock	Data transfers per second	Module name	Peak transfer rate
DDR-200	100 MHz	10 ns	100 MHz	200 Million	PC-1600	1600 MB/s
DDR-266	133 MHz	7.5 ns	133 MHz	266 Million	PC-2100	2100 MB/s
DDR-333	166 MHz	6 ns	166 MHz	333 Million	PC-2700	2667 MB/s
DDR-400	200 MHz	5 ns	200 MHz	400 Million	PC-3200	3200 MB/s

DDR2

Standard name	Memory clock	Cycle time	I/O Bus clock	Data transfers per second	Module name	Peak transfer rate
DDR2-400	100 MHz	10 ns	200 MHz	400 Million	PC2-3200	3200 MB/s
DDR2-533	133 MHz	7.5 ns	266 MHz	533 Million	PC2-4200	4266 MB/s
DDR2-667	166 MHz	6 ns	333 MHz	667 Million	PC2-53001	5333 MB/s
DDR2-800	200 MHz	5 ns	400 MHz	800 Million	PC2-6400	6400 MB/s
DDR2-1066	266 MHz	3.75 ns	533 MHz	1066 Million	PC2-8500	8533 MB/s