CPUEmbeddedReleased Oct 21, 2015

AMD Embedded R-Series RX-421BD

4C/4T · 3.4 GHz · 12 W

Flagship of AMD's Merlin Falcon Embedded R-Series, announced in October 2015 as the embedded version of the Carrizo APU and the first AMD platform to support DDR4 memory. Two Excavator modules with four cores and Radeon R7 graphics with eight GCN compute units at up to 800 MHz, rated at 819 GFLOPS, run within a TDP configurable from 12 to 35 W. It supports HEVC 4K decode, up to three 4K DisplayPort 1.2 displays, HSA 1.0, the AMD Secure Processor and ten years of supply longevity.

General

Manufacturer: AMD
Model: AMD Embedded R-Series RX-421BD
Segment: Embedded
Generation: R-series (Merlin Falcon)
Codename: Merlin Falcon
Architecture: x86_64
Microarchitecture: Excavator
Release date: Oct 21, 2015
Price: Search on Amazon

Cores & clocks

Cores / threads: 4 cores / 4 threads
Base clock: 2.10 GHz
Boost clock: 3.40 GHz
TDP (design W): 12 W
Max: 35 W
Unlocked: ✕ No
L2 cache: 2 MB
L3 cache: —
Technology (nm): 28 nm
28 nm

Platform

Socket: FP4
2-CPU (multi-socket): ✕ No
Integrated GPU: Radeon R7 (8 CU)
Clock: 800 MHz
Memory type: DDR4-2400, DDR3-2133 (ECC)
2-channel
Memory size: —
ECC memory: ✓ Yes
PCIe: PCIe 3.0

Instructions & AI

Instruction extensions: —
NPU: None

OS support

Windows: Windows 10
Linux: UbuntuFedoraArch Linux
Notes: AMD lists Windows 7, Windows Embedded 7 and 8 Standard, Windows 8.1 and Windows 10 for the Embedded R-Series, along with its open-source Linux driver and Mentor Embedded Linux. The Excavator-based processor is not on Microsoft's Windows 11 24H2 or 25H2 supported-processor lists, and Windows 11 26H2 keeps the same hardware requirements. Mainline Linux supports the platform, so mainstream distributions such as Ubuntu, Fedora and Arch run on it.

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