AMD K6-2+ 475ACZM socket: Super Socket 7

What the K6-2+ 475ACZM is

The AMD K6-2+ 475ACZM is a 475 MHz single-core desktop processor from April 2000. It runs one K6 Sharptooth core at 475 MHz with no turbo, so 1 core gives 1 thread. Cache is 128 KB of full-speed on-chip L2 with 64 KB of L1 on a 180 nm process. Power is rated at 13 W in a Super Socket 7 CPGA package on a 100 MHz front side bus.

A mobile-tuned bin at the same power as desktop 475ACZ strings gives the 475ACZM identical thermals with PowerNow tables, which is why quiet boards list both strings. AMD sold ACZM Sharptooth parts in April 2000 with desktop twins. The chip supports MMX, 3DNow+ and PowerNow.

A 475 MHz clock with a 13 W envelope suits quiet Super Socket 7 office towers with SDRAM. The shared 100 MHz bus keeps memory choice simple. That is why the 475ACZM shipped in low-noise working boxes.

Socket and motherboard compatibility

The 475ACZM fits Super Socket 7 quiet desktops with mobile-tuned support. It needs a 321-pin board with a 100 MHz bus and a BIOS that lists K6-2+ ACZM strings. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Quiet SDRAM towers are the natural match. Boards listing K6-2+ 475ACZM accept the chip with a 13 W cooler.

Memory, PCIe and cooling

Memory is EDO DRAM and SDRAM through the board chipset, matched to the board sockets. The CPU has no memory controller. Quiet boards commonly run PC100 pairs.

A 100 MHz front side bus ties the CPU to the chipset, while AGP and PCI hang off the chipset. No PCIe lanes originate on the die. Cooling uses the socket lug clip with a 13 W cooler.

Upgrade paths

On the same socket, a move to a K6-2+ 500ACZ keeps the board for 25 MHz more at equal power. A K6-2+ 475ACZ is the desktop twin at matching clocks. A K6-III+ 475ACZ such as AMD K6-III+ 475ACZ doubles cache at 12 W.

A move to Slot A Athlon needs a new board. The Super Socket 7 page lists the range for planning.