The Kingston KVR400X64C3A/512 is a DDR RAM that boosts the processing speed of your desktop computer. With a memory of 512 MB, this Kingston RAM module enables multiple applications to run concurrently without any glitches. This DDR RAM has a memory speed of 400 MHz and consumes less power, which makes it suitable for mobile systems. The Kingston KVR400X64C3A/512 is an unbuffered RAM which performs faster than a registered RAM. If you are looking for a RAM that delivers a decent performance, then this Kingston RAM module will certainly meet with your expectations.