Product Detail 8GB KIT OF 4 ( 4 X 2 GB) DDR3 DIMM 1600Mhz PC3-12800 240PIN Well Tested. Non-ECC Non parity Voltage 1.5V. COMES WITH HEAT SPREADERS. SUPPORTS DUAL CHANNEL TRIPLE CHANNEL AND QUAD CHANNEL Lifetime Warranty COMPATIBLE WITH ASRock P43Twins1600 . The "Komputerbay 8GB 4 X 2GB DDR3 DIMM 240pin 1600Mhz PC3 12800 FOR ASRock P43Twins1600 8 GB" is best product for you. We recommended Komputerbay 8GB 4 X 2GB DDR3 DIMM 240pin 1600Mhz PC3 12800 FOR ASRock P43Twins1600 8 GB