AMD Duron 650 socket: Socket 462

What the Duron 650 is

The AMD Duron 650 is a 650 MHz single-core desktop processor from June 2000. It runs one K7 Spitfire core at 650 MHz with no turbo, so 1 core gives 1 thread. Cache is 64 KB of full-speed on-chip L2 with 128 KB of L1 on a 180 nm process with 25 million transistors. Power is rated near 29.4 W in a Socket A ceramic PGA package on a 200 MT/s EV6 bus with a 6.5x multiplier at 1.6 V.

A half-ratio lift over the 600 at a small power cost makes the 650 a steady entry pick, which is why it shipped in first-wave Duron towers. AMD launched the Duron 650 on June 19, 2000 with the 600 and 700 parts. The chip supports MMX and Enhanced 3DNow with no SSE.

Entry clocks with a tiny cache suit first Socket A value towers with SDRAM. The 6.5x ratio needs an exact BIOS string. That is why the 650 shipped in budget home boxes.

Socket and motherboard compatibility

The 650 fits Socket A entry desktops with Spitfire support. It needs a 462-pin board with a 200 MT/s bus and a BIOS that lists Duron 650. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Entry SDRAM towers are the natural match. Boards listing Duron 650 accept the chip with a 29 W clip cooler.

Memory, PCIe and cooling

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

A 200 MT/s EV6 bus ties the CPU to the chipset on a 100 MHz clock, while AGP and PCI hang off the chipset. No PCIe lanes originate on the die. Cooling uses the Socket 462 lug clip with a 29 W cooler.

Upgrade paths

On the same socket, a move to a Duron 700 such as AMD Duron 700 keeps the board for 50 MHz more at 31 W. A Duron 600 such as AMD Duron 600 drops 50 MHz at 27 W.

A move to Athlon Thunderbird adds cache. The Socket 462 page lists the range for planning.