AMD Athlon XP-M 2400+ socket: Socket 462

What the Athlon XP-M 2400+ is

The AMD Athlon XP-M 2400+ is a 1800 MHz mobile processor from March 2003. It runs one K7 Barton core at 1800 MHz with no turbo, so 1 core gives 1 thread. Cache is 512 KB of L2 on a 130 nm process. The package is Socket 462 for notebooks with DDR slots. This page omits a TDP rating because the cpu_list 45 W figure lacks support in opened sources for this exact bin, while nearby 72W and 35W suffix bins use separate pages with their own power handling.

Unsuffixed XP-M numbers cover standard power mobile bins without a wattage suffix, distinct from 72W and 35W bins at the same 1800 MHz and 512 KB rating. All use a 266 MT/s front side bus with PowerNow control. AMD aimed unsuffixed bins at mainstream notebooks where the maker sets power tables per chassis, rather than fixing one wattage in the name. The chip supports MMX, Extended MMX, SSE, 3DNow and Enhanced 3DNow.

Suffix discipline matters here. The unsuffixed 2400+ at 1800 MHz needs the exact unsuffixed listing in the notebook maker CPU table, since 72W and 35W tables use different fan curves. Ordering by clocks alone risks a thermal mismatch despite matching frequency and cache.

Socket and motherboard compatibility

The XP-M 2400+ fits Socket 462 notebooks with DDR memory and a BIOS that lists the unsuffixed Barton 2400+ bin. It needs a notebook Socket 462 board with mainstream mobile power delivery. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Mainstream DDR notebooks are the natural match. Maker CPU tables decide fit by exact suffix, since wattage suffix bins use different cooling. Socket 563 boards need a microPGA package instead.

Memory, PCIe and cooling

Memory is DDR through the board chipset with notebook slots. The CPU has no controller.

Front side bus operation ties the CPU to the chipset, while graphics hangs off the chipset. No PCIe lanes originate on the die. Cooling is the notebook heat pipe for the exact mainstream chassis. PowerNow trims draw at idle for longer battery life.

Upgrade paths

On Socket 462 the suffixed 2400+ bins at the same clocks suit large and efficient bodies where listed. Higher XP-M 2500+ Barton parts offer more clocks. Beyond Socket 462 a move to Socket 754 needs a new notebook. The chip lifts with the lever, so swaps need no solder work.