AMD Athlon XP-M 2800+ socket: Socket 462

What the Athlon XP-M 2800+ is

The AMD Athlon XP-M 2800+ is a 2.133 GHz standard power mobile processor from July 2004. It runs one K7 Barton core at 2.133 GHz with no turbo, so 1 core gives 1 thread. Cache is 512 KB of L2 with 64 KB of L1 instruction and 64 KB of L1 data cache on a 130 nm process. The package is Socket 462 for notebooks with DDR slots and PowerNow power handling.

Standard power XP-M parts sit between DTR desktop-replacement bins and low power microPGA bins. DTR parts use Socket 462 packages with chassis power set by the system maker, while low power Barton parts use Socket 563 microPGA packages at 27 W and below. The XP-M 2800+ at 2.133 GHz uses a Socket 462 package with PowerNow trimming clocks and voltage on battery, which separates it from the DTR 2800+ at 2083 MHz that targets wall powered desktop-replacement bodies. This page omits a TDP rating because no opened source states the 55 W mobile figure for this exact bin.

Barton cache shapes the appeal. The 512 KB L2 doubles Thoroughbred mobile cache at nearby ratings, so office tasks and media playback feel quicker at the same front side bus. That is why Barton XP-M parts carried higher model numbers than Thoroughbred XP-M parts at similar megahertz.

Socket and motherboard compatibility

The XP-M 2800+ fits Socket 462 notebooks with DDR memory and a BIOS that lists Barton XP-M standard power parts. It needs a mobile Socket 462 board with PowerNow support, not a Socket 563 microPGA board or a Socket 754 K8 board. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Notebook maker lists decide fit. Power tables, fan curves and battery handling are tuned per XP-M model, so only listed models boot with full power management. Desktop Socket 462 tower boards may seat the chip, yet mobile power features stay dormant without notebook BIOS support. Forcing the package into the wrong socket risks pin damage.

Memory, PCIe and cooling

Memory is DDR through the board chipset in a single channel. SO-DIMM slots and ceiling capacity are fixed by the notebook, with speed tied to the front side bus of the Barton mobile platform. The CPU has no memory controller.

No PCIe lanes come from the processor. The front side bus ties the CPU to the mobile chipset, while AGP handles graphics and PCI handles other devices. Cooling is the notebook heat pipe assembly for the exact chassis, with PowerNow lowering clocks and voltage at idle and on battery. Clean vents and fresh paste matter more than cooler size, since notebook heat pipes cannot be swapped for tower heatsinks.

Upgrade paths

On Socket 462 the mobile path includes Athlon XP-M 2600+ and 2500+ Barton parts at lower clocks for cooler operation when the maker lists them. Desktop Barton 3000+ parts at 2100 MHz offer higher clocks in tower boards with desktop cooling. Low power Socket 563 parts such as the XP-M 2200+ at 1667 MHz suit thin notebooks where a 563-pin package and lower power matter more than raw clocks. Beyond Socket 462 a move to Socket 754 needs a new notebook for Mobile Athlon 64 parts. The XP-M chip removes with the lever, so same chassis swaps need no solder work.