ZOTAC H55 Tested CPU CPU type Speed CMOS CPU power Core i7-875K* 2.93GHz 45nm 95W Core i7-870* 2.93GHz 45nm 95W Core i7-860S* 2.53GHz 45nm 82W Core i7-860* 2.80GHz 45nm 95W Core i5-760* 2.80GHz 45nm 95W Core i5-750S* 2.40GHz 45nm 82W Core i5-750* 2.66GHz 45nm 95W Core i5-670 3.46GHz 32nm 73W Core i5-661 3.33GHz 32nm 87W Core i5-655K 3.20GHz 32nm 73W Core i5 650 3.20GHz 32nm 73W Core i3 540 3.06GHz 32nm 73W Core i3 530 2.93GHz 32nm 73W Pentium G6950 2.80GHz 32nm 73W * These processors have no Integrated Graphic. User must install add-on PCI-E Graphic card. Tested Memory Model marker size DDR type A-DATA 1GB DDR3-1066 1GB DDRIII 1066 Apacer AU02GFA33C9NBGC 2GB DDRIII 1066 AXH860UD20-13G 2GB DDRIII 1333 AXH860UD20-16G 2GB DDRIII 1600** ELPIDA J1108BABG 2GB DDRIII 1333 Hynix 4G DDR3-1333 PC10600 4GB DDRIII 1333 Kingston KVR1333D3N9/2G 2GB DDRIII 1333 Samsung 2G DDR3-1333 PC10600 2GB DDRIII 1333 Samsung 2GB DDR3-1066 PC8500 2GB DDRIII 1066 Samsung 4G DDR3-1333 PC10600 4GB DDRIII 1333 **DDRIII 1600 memory module runs at 1333MHz speed.