AMD Athlon XP-M 2000+ (25W) socket: Socket 563

What the Athlon XP-M 2000+ (25W) is

The AMD Athlon XP-M 2000+ (25W) is a 1533 MHz low power mobile processor from June 2003. It runs one K7 Barton core at 1533 MHz with no turbo, so 1 core gives 1 thread. Cache is 256 KB of L2 on a 130 nm process. Power is rated at 25 W in a 563-pin microPGA package for thin notebooks. The Socket 563 page names 25 W as a low-power Athlon XP-M envelope for Thoroughbred and Barton parts, which supports the 25 W rating here.

Low power microPGA packaging separates the part from standard power XP-M Barton parts on Socket 462 at 55 W and 72 W with similar clocks. The 2000+ (25W) uses a 266 MT/s front side bus with PowerNow trimming voltage and clocks on battery. AMD aimed the bin at thin and light notebooks where fan noise and battery life matter more than peak throughput. The chip supports MMX, SSE and Enhanced 3DNow with PowerNow control.

Model suffixes with wattage are part of the model on this site, giving each power bin its own page and slug. A 2000+ (35W) at the same 1533 MHz shares clocks with higher power for larger chassis, so the suffix decides cooler and board expectations despite identical frequency.

Socket and motherboard compatibility

The 2000+ (25W) fits Socket 563 notebooks with DDR memory and a BIOS that lists 563-pin Barton low power parts. It needs a microPGA board with 563 lands and low voltage delivery. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Thin DDR notebooks are the natural match. Only a small set of notebooks and a few desktop boards such as the PCChips M863G Ver3 used Socket 563, often bundled with the processor. A Socket 462 chip does not seat in the 563-pin socket.

Memory, PCIe and cooling

Memory is DDR through the board chipset with notebook SO-DIMM slots. Speed follows the 266 MT/s bus. The CPU has no controller.

Front side bus operation ties the CPU to the mobile chipset, while graphics hangs off the chipset. No PCIe lanes originate on the die. Cooling is the notebook heat pipe for a 25 W envelope with quiet fans. PowerNow extends battery life by cutting clocks at idle.

Upgrade paths

On Socket 563 the steps include higher Barton XP-M 563-pin parts where the maker lists them. The 2000+ (35W) at the same clocks suits larger chassis with bigger cooling. Standard power Socket 462 XP-M parts offer higher clocks with larger power. Beyond these K7 mobiles a move to Socket S1 needs a new notebook. The chip lifts with the socket mechanism, so swaps need no solder work.