While AM3 motherboards do not officially support the newer AM3+ CPUs (Vishera, Zambezi), some motherboard manufacturers have released BIOS update that allow their AM3 motherboards to work with AM3+ CPUs. An engineering sample is what I once heard suggested. The AMDK6-2+MobileDatasheet.pdf doesn’t mention ACZM either. The K8 was the first implementation of the AMD64 64-bit extension to the x86 instruction set architecture. I have never known what the difference is with the ACZ. Family 10h (K10) The AMD K8 Hammer, also code-named SledgeHammer, is a computer processor microarchitecture designed by AMD as the successor to the AMD K7 Athlon microarchitecture. Motherboards with AM3+ AMD CPU socket supports both AM3+ (Vishera, Zambezi) and AM3 (Phenom II, Athlon II, Sempron) CPUs right out of the box. One thought on CPU Specs Hatröss on Jat 18:30 said: I own a K6-2+ 500 ACZM. The processor is designed for server-computers and based on K10.