If you are referring to standard RAM modules for a computer I believe you're looking for "PC1600" DDR ram. Not DDR2 or 3, just plain DDR ram.
Hope this helps!
DDR-400
Amount of cache memory, speed of processor, speed of the front side bus
System bus speed in microprocessors is the speed at which a processor sends/receives data from the motherboard's memory controller. It is also called the Front Side Bus (FSB) speed in the case of Intel CPUs.
AnswerFSB or Front Side Bus is a bus (group of signals) which connects the computer processor to the North Bridge/memory controller. FSB speed decides the speed of memory acess.Also see,http:/en.wikipedia.org/wiki/Front_side_bus- Neeraj Sharma
Front side bus, which is part of the mother board
SIMM (Single Inline Memory Module), is a form of RAM (Random Access Memory) It is a ram chip with memory chips on one side. A DIMM (Dual Inline Memory Module) is like a SIMM, but has memory chips on both sides.
The driver's side airbag module is in the center of the steering wheel If it has a front pasenger airbag the module is in the right side of the instrument panel.
The Front Side Bus (FSB) connects the processor (CPU) in your computer to the system memory.
On a 1994 Ford Explorer, the computer module is behind the kick panel on the passenger front side.
The air bag module on 2002 Chevy venture is located between the driver side front seat and the passenger side front seat under the carpet
Passenger side front wheel well.
The speed can be determined in various ways. The clock speed of the processor, the speed of the hard drive, the speed of the bus carrying information from the processor to the memory and the speed of the memory. dual or quad core processors running at more than 2.5 Ghz is fast a hard drive that has a spindle speed of 7500 to 10,000 RPMs is fast 1066 or 2000 Mhz of front side bus is fast 800 Mhz or more memory speed is fast
The front side bus connects the CPU on the motherboard to the Northbridge. Front side bus speed is in preference to how much data can move across the bus simultaneously, and is measured in megahertz.