Radxa ROCK 4C Plus
Expert rating7 / 10
- SoC:
- Rockchip RK3399
- CPU:
- Dual Cortex-A72 @ 1.8GHz + Quad Cortex-A53 @ 1.4GHz
- Memory:
- Up to 4GB LPDDR4
- Storage:
- microSD + M.2 NVMe (E-key)
- Price:
- $75
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Manufacturer: Radxa Last updated: 2026-09-14
Radxa ROCK 4C Plus (Single-Board Computer/Rockchip RK3399/Hexa-Core Cortex-A72+A53/Up to 4GB LPDDR4/40-Pin GPIO with PCIe M.2) Review
Radxa ROCK 4C Plus single-board computer with Rockchip RK3399, up to 4GB LPDDR4 RAM, a 40-pin Pi-compatible GPIO header, an M.2 E-key slot for WiFi/NVMe expansion, and Gigabit Ethernet.
The 4C Plus sits alongside Radxa's own ROCK Pi 4C Plus as a close relative in the same RK3399 family, distinguished mainly by its board layout and connector choices, and it remains a dependable mid-range option for anyone who wants RK3399 performance in a Pi-header-compatible, 85 x 56mm package.
Overview
Sharing the RK3399 SoC family with several other Radxa boards, the ROCK 4C Plus is aimed at makers who want a proven, moderately priced ARM board with GPIO compatibility and a small M.2 expansion slot, without paying for the newer RK3588's extra performance they may not need.
Performance & Connectivity
Gigabit Ethernet, USB 3.0, HDMI up to 4K30, and an M.2 E-key slot (typically used for WiFi/BT combo cards, with NVMe support on some carrier configurations) give the 4C Plus solid, if unspectacular, general-purpose connectivity, backed by an onboard RTC battery connector for headless clock-keeping.
Comparison to Alternatives
Against the Radxa ROCK Pi 4C Plus, the two boards are close siblings from the same SoC generation, differing mainly in connector layout and expansion options rather than raw performance. Compared to the newer Radxa ROCK 5B in this catalog, the 4C Plus is meaningfully slower and lacks an NPU, but costs roughly $25 less and remains a fine choice for non-AI general computing. Against the Raspberry Pi 4 Model B (8GB), the 4C Plus offers similar Pi-header GPIO compatibility with a faster RK3399 CPU but a smaller software/tutorial ecosystem and a maximum of 4GB RAM versus the Pi 4's 8GB option.
Specifications
Identity
| Brand | Radxa |
|---|
| CPU Architecture | ARM |
|---|---|
| Memory | 4 GB |
| Storage Type | NVMe/M.2 |
| Has AI Accelerator / NPU | No |
| Wireless | WiFi 5 |
| GPIO Header | Yes |
| Price | 75 USD |
| Use Case | General Purpose |
| Model | ROCK 4C Plus |
| Processor | Rockchip RK3399, Dual Cortex-A72 @ 1.8GHz + Quad Cortex-A53 @ 1.4GHz |
| GPU | Mali-T860MP4 |
| Power | 5V/3A USB-C |
| Board Dimensions | 85 x 56 mm (Pi-compatible footprint) |
| USB Ports | 2x USB 3.0 Type-A, 2x USB 2.0 Type-A |
| Video Output | 1x HDMI 2.0 (4K30), MIPI-DSI |
| Video Decode | 4K@60fps H.265/VP9 |
| PCIe | M.2 E-key slot (WiFi/BT combo, NVMe on select carrier revisions) |
| Ethernet | Gigabit Ethernet |
| Camera/Display Connectors | MIPI-CSI, MIPI-DSI |
| Audio | 3.5mm headphone/mic jack, HDMI audio |
| RTC | Yes, onboard battery connector |
| Operating System Support | Debian, Ubuntu, Android 11, Armbian |
| Price Variants | 2GB $55 / 4GB $75 |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating7 / 10
A dependable mid-tier RK3399 board for GPIO projects that don't need RK3588-class performance -- solid, if no longer cutting edge.
Best for
- General-purpose GPIO projects on a mid-range budget
- Light desktop Linux use with 4K video output
- Makers already invested in the Radxa software ecosystem
Not for
- AI/ML projects needing an onboard NPU
- Buyers wanting the newest available Radxa silicon
- NVMe-heavy storage builds (M.2 slot is E-key, not full M-key)
FAQs
What are the key specifications of the Radxa ROCK 4C Plus (Single-Board Computer/Rockchip RK3399/Hexa-Core Cortex-A72+A53/Up to 4GB LPDDR4/40-Pin GPIO with PCIe M.2)?
The Radxa ROCK 4C Plus (Single-Board Computer/Rockchip RK3399/Hexa-Core Cortex-A72+A53/Up to 4GB LPDDR4/40-Pin GPIO with PCIe M.2) is a single board computer from Radxa. Key specs: Processor Rockchip RK3399, Dual Cortex-A72 @ 1.8GHz + Quad Cortex-A53 @ 1.4GHz, CPU Architecture ARM, GPU Mali-T860MP4, Memory 4, Storage Type NVMe/M.2.
Will the Radxa ROCK 4C Plus (Single-Board Computer/Rockchip RK3399/Hexa-Core Cortex-A72+A53/Up to 4GB LPDDR4/40-Pin GPIO with PCIe M.2) work with my current setup?
The Radxa ROCK 4C Plus (Single-Board Computer/Rockchip RK3399/Hexa-Core Cortex-A72+A53/Up to 4GB LPDDR4/40-Pin GPIO with PCIe M.2) lists Processor is Rockchip RK3399, Dual Cortex-A72 @ 1.8GHz + Quad Cortex-A53 @ 1.4GHz. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the Radxa ROCK 4C Plus (Single-Board Computer/Rockchip RK3399/Hexa-Core Cortex-A72+A53/Up to 4GB LPDDR4/40-Pin GPIO with PCIe M.2) best suited to?
It suits general-purpose gpio projects on a mid-range budget, light desktop linux use with 4k video output, makers already invested in the radxa software ecosystem.
What are the drawbacks of the Radxa ROCK 4C Plus (Single-Board Computer/Rockchip RK3399/Hexa-Core Cortex-A72+A53/Up to 4GB LPDDR4/40-Pin GPIO with PCIe M.2)?
It is a poor fit for ai/ml projects needing an onboard npu, buyers wanting the newest available radxa silicon, nvme-heavy storage builds (m.2 slot is e-key, not full m-key).
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