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Raspberry Pi 400 keyboard computer
Raspberry Pi

Raspberry Pi 400

Expert rating7 / 10

View on raspberrypi.com
SoC:
Broadcom BCM2711
CPU:
Quad-core Cortex-A72 @ 1.8GHz
RAM:
4GB LPDDR4
Form Factor:
Keyboard computer
Price:
$70

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Manufacturer: Raspberry Pi Last updated: 2026-10-10

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Raspberry Pi 400 Review

The Raspberry Pi 400 packs a full Raspberry Pi 4 into a keyboard enclosure, predating the newer Raspberry Pi 500 already on this site and remaining in production as a lower-cost keyboard-computer option built on older, cheaper silicon.

Launched as a $70 desktop computer, the Pi 400 established the keyboard-computer form factor that the newer Raspberry Pi 500 later refined with faster silicon, giving budget buyers an entry point that predates and undercuts the 500's pricing.

The Original Keyboard Pi

Launched as a $70 desktop computer, the Pi 400 established the keyboard-computer form factor that the newer Raspberry Pi 500 later refined with faster silicon, giving budget buyers an entry point that predates and undercuts the 500's pricing.

Pi 4-Class Performance in a Keyboard

A quad-core Cortex-A72 at 1.8GHz (slightly overclocked versus the standalone Pi 4 board) delivers capable but dated performance next to the Pi 500's newer Cortex-A76 cores, positioning the 400 as the budget choice for buyers who don't need the latest silicon.

Comparison to Alternatives

Against the Raspberry Pi 500 already on this site, the Pi 400 uses older BCM2711 silicon at a lower price, appealing to education and budget buyers who don't need the 500's performance headroom. Against the Raspberry Pi 5 already on this site, the Pi 400 trails significantly in raw performance while keeping the same convenient keyboard form factor at a lower cost.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating7 / 10

The budget keyboard computer, built on Pi 4-era silicon at a price well under the Pi 500.

Best for

  • Budget-conscious buyers and classrooms that want a keyboard computer without Pi 500 pricing.

Not for

  • Anyone who needs the Raspberry Pi 500's newer, faster silicon.

Specifications

What these specs mean

Identity

BrandRaspberry Pi

Processor

SoC ModelBroadcom BCM2711

Memory

RAM Capacity4GB LPDDR4

Storage

Onboard StoragemicroSD card slot

Networking

Ethernet SpeedGigabit
Bluetooth Version5.0 BLE

Expansion

GPIO Pins40 pins

Power

Power Input5V DC via USB

Physical and software

Board Form FactorKeyboard computer
Price70 USD

Measured results

HPL (Linpack) test

HPL (Linpack) throughput11.077 GflopsHPL (Linpack), whole board · Raspberry Pi 400 (BCM2711) · Source
HPL efficiency1.73 Gflops/WHPL (Linpack), whole board · Raspberry Pi 400 (BCM2711) · Source
Wall power during HPL6.4 WHPL (Linpack), whole board · Raspberry Pi 400 (BCM2711) · Source

One run by the author. Power is average wall power for the whole board during the run (Kill-A-Watt or smart-plug meter), so it includes the power supply and attached devices. Results depend on RAM, cooling and software settings.

Retrieved 23 Sept 2026

Jeff Geerling, top500-benchmark (github.com/geerlingguy/top500-benchmark). Copyright 2022 Jeff Geerling. Used under the MIT License; full permission notice: github.com/geerlingguy/top500-benchmark/blob/master/LICENSE

Measured results

Board measurements

Memory copy bandwidth (tinymembench memcpy)2,564.8 MB/sBoard as reviewed · Raspberry Pi 400 (review 59) · Source
Idle power2.7 WBoard as reviewed · Raspberry Pi 400 (review 59) · Source
Power under full CPU load (stress-ng)5.2 WBoard as reviewed · Raspberry Pi 400 (review 59) · Source

Measured by the author on one board. Power is measured at the wall for the whole board. Memory bandwidth is the tinymembench memcpy result.

Retrieved 23 Sept 2026

Jeff Geerling, sbc-reviews (github.com/geerlingguy/sbc-reviews, web/data/results.yml). Copyright (c) 2023 Jeff Geerling. Used under the MIT License; full permission notice: github.com/geerlingguy/sbc-reviews/blob/master/LICENSE

Measured results

Local LLM on CPU

LLM text generation, Llama 3.2 3B on CPU1.6 tokens/sLlama 3.2 3B on CPU · Raspberry Pi 400 (review 59) · Source

Measured by the author on one board, CPU only, with the model and settings listed in the linked review.

Retrieved 23 Sept 2026

Jeff Geerling, sbc-reviews (github.com/geerlingguy/sbc-reviews, web/data/results.yml). Copyright (c) 2023 Jeff Geerling. Used under the MIT License; full permission notice: github.com/geerlingguy/sbc-reviews/blob/master/LICENSE

Measured results

sbc-bench results

7-Zip MIPS, multi-threaded6,550 MIPSsbc-bench run · Raspberry Pi 400 (BCM2711); 1800 MHz; kernel 5.4; Raspberry Pi OS Buster · Source
7-Zip MIPS, single-threaded1,903 MIPSsbc-bench run · Raspberry Pi 400 (BCM2711); 1800 MHz; kernel 5.4; Raspberry Pi OS Buster · Source
OpenSSL AES-256-CBC, single thread77,890 KB/ssbc-bench run · Raspberry Pi 400 (BCM2711); 1800 MHz; kernel 5.4; Raspberry Pi OS Buster · Source
Memory copy bandwidth (tinymembench memcpy)2,680 MB/ssbc-bench run · Raspberry Pi 400 (BCM2711); 1800 MHz; kernel 5.4; Raspberry Pi OS Buster · Source

The author states these are not pure hardware numbers: they depend on kernel, distro and settings, and openssl (AES) numbers should be taken with a grain of salt. Single run, as listed in sbc-bench Results.md.

Retrieved 23 Sept 2026

sbc-bench by Thomas Kaiser (github.com/ThomasKaiser/sbc-bench, Results.md). Copyright (c) 2018, Thomas Kaiser. All rights reserved. Redistributed under the BSD 3-Clause License; full notice, conditions and disclaimer: github.com/ThomasKaiser/sbc-bench/blob/master/LICENSE

FAQs

What are the key specifications of the Raspberry Pi 400 (Keyboard Computer/Broadcom BCM2711/Quad-Core Cortex-A72 1.8GHz/4GB LPDDR4)?

Key specs for the Raspberry Pi 400: SoC Broadcom BCM2711, CPU Quad-core Cortex-A72 @ 1.8GHz, RAM 4GB LPDDR4, Storage microSD card slot, Ethernet Gigabit, Wi-Fi Dual-band 802.11b/g/n/ac.

Will the Raspberry Pi 400 (Keyboard Computer/Broadcom BCM2711/Quad-Core Cortex-A72 1.8GHz/4GB LPDDR4) work with my current setup?

The Raspberry Pi 400 (Keyboard Computer/Broadcom BCM2711/Quad-Core Cortex-A72 1.8GHz/4GB LPDDR4) lists SoC is Broadcom BCM2711. 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 Raspberry Pi 400 (Keyboard Computer/Broadcom BCM2711/Quad-Core Cortex-A72 1.8GHz/4GB LPDDR4) best suited to?

Best suited to: Budget-conscious buyers and classrooms that want a keyboard computer without Pi 500 pricing.

What are the drawbacks of the Raspberry Pi 400 (Keyboard Computer/Broadcom BCM2711/Quad-Core Cortex-A72 1.8GHz/4GB LPDDR4)?

Not the best fit for: Anyone who needs the Raspberry Pi 500's newer, faster silicon.

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