AMD K6-2+ 450ACZ socket: Super Socket 7

What the K6-2+ 450ACZ is

The AMD K6-2+ 450ACZ is a 450 MHz single-core desktop processor from April 2000. It runs one K6 Sharptooth core at 450 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 with a 4.5x multiplier.

A 450 MHz clock with PowerNow suits quiet Super Socket 7 boxes with small coolers and SDRAM. The 4.5x ratio matches the K6-III+ 450ACZ bus tables, so boards often list both strings together. AMD sold the K6-2+ 450ACZ in April 2000 for value boards. The chip supports MMX, 3DNow+ and PowerNow.

Low clocks with a 13 W envelope suit fan-quiet office towers with integrated graphics. The shared 100 MHz bus keeps memory choice simple. That is why the 450ACZ shipped in silent working boxes.

Socket and motherboard compatibility

The 450ACZ fits Super Socket 7 quiet desktops with Sharptooth support. It needs a 321-pin board with a 100 MHz bus and a BIOS that lists K6-2+ parts. 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+ 450ACZ 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+ 475ACZ keeps the board for 25 MHz more at equal power. A K6-III+ 450ACZ doubles cache to 256 KB at 12 W for slightly lower power. A K6-2+ 450ACZM is the mobile-tuned twin at matching clocks.

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