What is difference between ddr2 and ddr3

DRAM Type || Transfer Rate(MT/s) || Voltage
DDR  || 200–400  || 2.5/2.6
DDR2 || 400–1066 || 1.8
DDR3 || 800–2133 || 1.5

even so DDR2 and DDR3 both have 240 Pins they cannot be exchanged since they have different Voltage keying.

http://en.wikipedia.org/wiki/DDR_SDRAM

This topic has been moved from the section Networking to section Motherboards & Memory by Grumpy9117

just a newer standard, thats about it

performance goes up but not really clock to clock like most ram as the latency is higher...