AMD Ryzen AI Max 385 socket: FP11

What the Ryzen AI Max 385 is

The Ryzen AI Max 385 is an 8-core, 16-thread mobile APU that AMD launched in January 2025 at the base of the consumer Strix Halo lineup. Its eight uniform Zen 5 cores run at 3.6 GHz and boost to 5.0 GHz, backed by 8 MB of L2 and 32 MB of L3 cache. Graphics come from AMD Radeon 8050S Graphics with 32 compute units at up to 2800 MHz, and an XDNA 2 NPU rated at up to 50 TOPS covers local AI work.

The 385 is the way into Halo memory bandwidth at the lowest thread count. It keeps the full 256-bit memory controller and the 32 compute unit GPU of the 12-core class while cutting the CPU to a single chiplet, so buyers get wide graphics and wide memory without paying for cores they will not use. Total platform AI throughput is rated at up to 106 TOPS across CPU, GPU and NPU. Its PRO twin with management features is the AMD Ryzen AI Max PRO 385.

Strix Halo is a chiplet design. A single Zen 5 core chiplet sits beside a large I/O die that holds the graphics engine, the NPU and the memory controller, and AMD builds the compute silicon on the TSMC 4 nm FinFET process. The system maker sets power and cooling inside a 45 to 120 W configurable window, with 55 W as the default TDP for this SKU.

Against the 12-core class above it, the 385 gives up four CPU cores and half the L3 cache while holding the GPU constant at 32 compute units. Games and GPU bound creation see a modest gap between the two, while heavily threaded work favors the larger chip. The January 2026 refresh later added an 8-core sibling with the full 40 compute unit GPU for buyers who want the same CPU with wider graphics.

Socket and motherboard compatibility

AMD ships the Ryzen AI Max 385 only as a soldered part for FP11, which means the processor arrives fixed to the board and it cannot be replaced or upgraded in the field. Assembly solders all 2,077 balls of the 37.5 × 45 mm package in one factory step, and the thermal design is validated for that single configuration through the service life of the machine.

There is no board or chipset choice in the retail sense. The vendor selects the soldered memory capacity, tunes the firmware and validates cooling for the 45 to 120 W window. Moving to more cores means a different board build, not a part swap, even though the Strix Halo SKUs share the FP11 package. Readers new to soldered packages can review LGA, PGA and BGA: CPU package types explained for how a ball grid array differs from a socketed desktop part.

The FP11 footprint is shared with the commercial branch of the same silicon, including the PRO twin AMD Ryzen AI Max PRO 385 and long lifecycle embedded parts such as the AMD Ryzen AI Embedded X188i. The smaller FP8 package covers lower power laptops with narrower memory buses. Halo boards stay distinct from those mainstream designs by memory width, package size and power class.

Memory, PCIe and cooling

Memory is soldered LPDDR5X up to 8000 MT/s on a 256-bit bus, with up to 128 GB in one unified pool shared by the CPU cores, the 32 compute unit graphics engine and the NPU. Up to 96 GB of that pool can be reserved for graphics workloads on the 300 series platform. Capacity and speed are fixed when the board is built, so they rank with the SKU as permanent choices that deserve planning before purchase.

Expansion comes from 16 PCIe Gen4 lanes from the SoC, which typically serve NVMe storage and high speed peripherals, plus native USB4 ports for docks and external devices. Display and parallel compute run on the integrated Radeon graphics, so the lanes stay free for storage and I/O duties. The exact lane split and port list are set per machine design, so the vendor specification governs.

Cooling is a system responsibility across the 45 to 120 W configurable range. Eight Zen 5 cores plus 32 graphics compute units still demand a serious heatsink and fan design in a thin chassis, so chassis choice decides how long the chip holds peak clocks under combined load. There is no boxed cooler and no retail heatsink list for a soldered mobile APU.

Upgrade paths

There is no CPU upgrade path on a soldered package. When eight cores stop being enough for threaded work, the step inside Strix Halo is a different class of machine with more CPU cores, since the GPU and memory platform already match the 12-core class. A board replacement is the only route, and it carries new memory and firmware with it.

Moving off FP11 means a new platform. Lower power laptops use narrower memory buses and smaller packages, while socketed desktop builders meet related Zen 5 silicon on boards such as AM5. Because memory is soldered on FP11, even a memory size change means a new board, so capacity planning belongs at the start of the project rather than at the end. For identifying which platform a machine uses, How to find your CPU socket type walks through the checks.