AMD A4-5145M socket: Socket FP2

What the A4-5145M is

AMD A4-5145M is a dual core Richland mobile APU in the soldered Socket FP2 package, released in June 2013. It runs at 2 GHz base with turbo to 2.6 GHz, with 1 MB L2 (no L3). The thermal rating is 17 W on a 32 nm process. Graphics come from AMD Radeon HD 8310G (up to 554 MHz). The chip is soldered and cannot be replaced, so the laptop board decides memory, display outputs and cooling.

The cores use the Piledriver module layout with 1 mb l2 in total, and threads equal cores at 2. The on die graphics block is AMD Radeon HD 8310G (up to 554 MHz), which shares system memory over ddr3l up to 1333 mt/s, two channels. That sharing is why two matched modules help frame pacing in light games. The APU also carries pcie 2.0 from the apu, while SATA, USB and wireless run through the board wiring.

At 17 W the A4-5145M fits thin ultraportables with a single heat pipe. The 2 GHz base keeps everyday work responsive on battery, while turbo to 2.6 GHz helps short bursts on AC power. Memory speed follows the board design, and the manual lists qualified SODIMM kits. The How to find your CPU socket type guide shows how to confirm the package before ordering parts.

Socket and motherboard compatibility

The A4-5145M solders to Socket FP2 with 827 balls and cannot be moved to another board. There is no retention lever and no pin grid. Laptop makers qualify each model with a specific board and BIOS, so even another Richland FP2 part is not a drop in upgrade. The socketed twin family lives on Socket FS1r2, but the packages never interchange. A board replacement is the only path to a faster chip, and it rarely pays against a newer laptop.

Power and BIOS decide service results on mobile. The 17 W rating sizes the heat pipe and fan, and the board BIOS must list the exact A4-5145M string. A 35 W board rarely accepts a different voltage class without thermal issues. The CPU cooler compatibility by socket guide notes that laptop heatsinks are board specific with no desktop mount pattern. For soldered FP2 the cooler question is moot, since the chip cannot be removed.

Memory, PCIe and cooling

Memory on the A4-5145M is ddr3l up to 1333 mt/s, two channels over two channels in SODIMM form. Many laptops ship with two matched modules, which helps the AMD Radeon HD 8310G graphics block that shares system RAM. Some thin boards solder the memory, so capacity locks at purchase. The board manual lists the maximum per slot and the voltage.

PCI Express is pcie 2.0 from the apu with a layout that varies by board. Most laptops in this class keep the graphics path internal to AMD Radeon HD 8310G and devote lanes to SATA storage and wireless. A discrete GPU is uncommon here. Display outputs, USB and storage all follow the board wiring, so the laptop manual is the final word on ports.

Cooling uses the laptop heatsink, not a retail mount. The 17 W envelope sizes the heat pipe count and fan curve in the original chassis. Repaste and fan cleaning help sustained clocks more than any setting change. On soldered FP2 boards the heatsink cannot be swapped for a desktop pattern. On socketed FS1r2 boards the heatsink is still board specific, so model numbers must match.

Upgrade paths

There is no CPU upgrade path on soldered FP2. The A4-5145M cannot be removed, so a faster Richland part means a new board or a new laptop. The practical move for more speed is a full platform change to FP8 or newer, with DDR5 memory and current wireless. For a working laptop, an SSD and a memory pair where slots allow give more gain than chasing another FP2 board.

A platform move means a new laptop. Current AMD mobile lives on FP8 and newer with DDR5 and modern wireless, which no FP2 or FS1r2 board can reach. Batteries, displays and keyboards also age with the board, so a whole system replacement usually beats a board swap. Recycle the old laptop through a proper e waste path once data is wiped.