Phenom is the
64-bit AMD desktop processor line based on the
K10 microarchitecture, in what AMD calls family 10h (10 hex, i.e. 16 in normal decimal numbers) processors, sometimes incorrectly called "K10h". Triple-core versions (codenamed
Toliman) belong to the Phenom 8000 series and quad cores (codenamed
Agena) to the AMD Phenom X4 9000 series. The first processor in the family was released in 2007.