TwinMOS DDR3 UDIMM Supreme is a 240-pin standard design, operating with a voltage of 1.5 and 1.35 volts to achieve both energy and electricity saving and meet environmental protection regulations. Moreover, TwinMOS DDR3 U-DIMM provides various frequency and capacity selections to meet different levels of requirements of consumers in use. Compared to the 4-bit pre-fetch design of DDR2 modules, the new generation of DDR3 modules uses an 8-bit pre-fetch design, representing a doubling over the DDR2 pre-fetch. Both DDR3 and DDR2 modules use a 240-pin-architecture, but compared to the DDR2 working voltage of 1.8V, the working voltage of DDR3 has been reduced to 1.5V