AMD Athlon XP-M 2500+ socket: Socket 462

What the Athlon XP-M 2500+ is

The AMD Athlon XP-M 2500+ is a 1867 MHz mobile processor from March 2003. It runs one K7 Barton core at 1867 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 35W and 72W suffix bins use separate pages.

The 2500+ mobile shares its 1867 MHz and 512 KB rating with OEM desktop Barton 2500+ parts at 1867 MHz on a 266 MT/s bus, yet mobile power tables replace tower cooling curves. All use a 266 MT/s front side bus with a 14x multiplier and PowerNow control. AMD aimed unsuffixed 2500+ mobiles at mainstream notebooks where the maker tunes power per chassis. The chip supports MMX, Extended MMX, SSE, 3DNow and Enhanced 3DNow.

Desktop and mobile ratings with matching clocks need different boards. The OEM desktop 2500+ at 1867 MHz suits Socket 462 towers with desktop heatsinks, while the XP-M 2500+ needs a notebook board with mobile power delivery. That split is why the same frequency appears in tower and notebook lists with different cooling.

Socket and motherboard compatibility

The XP-M 2500+ fits Socket 462 notebooks with DDR memory and a BIOS that lists the unsuffixed Barton 2500+ bin. It needs a notebook Socket 462 board. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Mainstream DDR notebooks are the natural match. Maker tables decide fit by exact suffix, since 35W and 72W bins use different cooling. Desktop Barton 2500+ parts suit towers 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 with PowerNow control.

Upgrade paths

On Socket 462 the suffixed 2500+ bins at the same clocks suit efficient and large bodies where listed. Higher XP-M 2600+ 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.