It's great! it works for my 64 bit windows vista!

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Intel Core 2 Duo 4400 2 GHz S.775,Ram Twin_Mos 1 GB DDR2 PC 5300(667 MHz),Asrock 4Coredual-VSTA ,VGA Sapphire AMD/ATI Radeon X1600 pro 512 MB (AGP8X),PSU Enermax Liberty 400 Watt,,HDD 80 GB WD (S-ata 1) and 250 GB WD(S-ata 2),External HDD Lacie 250 GB,Sound Card SB Audigy 2,OS Windows XP SP 2(Greek) and Windows Vista Ultimate X64(Greek) in Dual-Boot Mode!