AMD Athlon XP-M 2400+ (35W) socket: Socket 462

What the Athlon XP-M 2400+ (35W) is

The AMD Athlon XP-M 2400+ (35W) 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 no opened source states a 35 W figure for this exact XP-M bin, while SFF 35 W figures belong to desktop low-voltage bins with different packages.

The 2400+ (35W) shares clocks and cache with 72W and 45W bins at 1800 MHz, so power handling separates otherwise identical ratings. All use a 266 MT/s front side bus with PowerNow trimming voltage on battery. AMD aimed 35 W bins at efficient notebooks with medium heat pipes, between thin low-power designs and large desktop-replacement bodies. The chip supports MMX, Extended MMX, SSE, 3DNow and Enhanced 3DNow.

Power bins with matching clocks need careful ordering. A notebook qualified for 72 W operation accepts the 35W chip thermally, yet power tables may misreport without the exact suffix listed. That is why the suffix stays in the model with its own slug.

Socket and motherboard compatibility

The 2400+ (35W) fits Socket 462 notebooks with DDR memory and a BIOS that lists the 35W Barton bin. It needs a notebook Socket 462 board with efficient power delivery. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Efficient DDR notebooks are the natural match. Maker lists decide fit by suffix, since 72W chassis use different fan curves. Socket 563 microPGA boards need a different package.

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 efficient chassis. PowerNow extends battery life by cutting clocks at idle.

Upgrade paths

On Socket 462 the 72W bin at the same clocks suits larger bodies with bigger cooling. Higher XP-M 2500+ Barton parts offer more clocks where listed. Beyond Socket 462 a move to Socket 754 needs a new notebook. The chip lifts with the lever, so swaps need no solder work.