CPUEmbeddedReleased Oct 21, 2015

AMD Embedded R-Series RX-421ND

4C/4T · 3.4 GHz · 12 W

Headless quad-core model of AMD's Merlin Falcon Embedded R-Series, announced in October 2015. It keeps the RX-421BD's two Excavator modules, 2.1 to 3.4 GHz clocks and 12 to 35 W configurable TDP but has no integrated graphics, for embedded systems that need CPU performance without display output. DDR4-2400 or DDR3-2133 memory with ECC, the AMD Secure Processor and ten years of supply longevity are carried over from the rest of the family.

General

Manufacturer: AMD
Model: AMD Embedded R-Series RX-421ND
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: None
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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