Raspberry Pi 4
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| Also known as | Pi 4, RPi4 |
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| Developer | Raspberry Pi Trading |
| Type | Single-board computer |
| Release date | 24 June 2019 |
| Introductory price | $35 (1 GB) $45 (2 GB) $55 (4 GB) $75 (8 GB) |
| Operating system | Raspberry Pi OS |
| System on a chip | Broadcom BCM2711 |
| CPU | Quad-core ARM Cortex-A72 @ 1.5 GHz (B0 Revision) / 1.8 GHz (C0 Revision) |
| Memory | (LPDDR4 @ 2400 MHz) |
| Removable storage | MicroSD, USB Storage |
| Graphics | VideoCore VI @ 500 MHz |
| Power | 5V @ 3A |
| Predecessor | Raspberry Pi 3B+ |
| Successor | Raspberry Pi 5 |
The Raspberry Pi 4 is the 4th major revision to the mainline series of Raspberry Pi single-board computers. Developed by Raspberry Pi Trading and released on 24 June 2019, the Pi 4 came with many improvements over its predecessor; the SoC was upgraded to the Broadcom BCM2711, two of the Raspberry Pi's four USB ports were upgraded to USB 3.0, and options were added for RAM capacities larger than the 1 GB standard for the preceding Raspberry Pi 3 series.[1] The Pi 4 also ends the trend of the $35 maximum MSRP that previous Raspberry Pis had adhered to, as the larger RAM capacities added extra cost to the board; however, the base 1 GB model is still sold for $35.[2] On 28 September 2023, the Raspberry Pi 5 was announced as the successor to the Raspberry Pi 4.[3]
Specifications
CPU
The Raspberry Pi 4 uses a Quad-core ARM Cortex-A72 clocked at either 1.5 GHz or 1.8 GHz depending on the revision of the BCM2711 SoC on the board.[4] The older B0 stepping was originally used for the Pi 4, but this was replaced with the newer C0-stepped chip starting in mid-2021. The higher clock rate of the C0 stepping is due to the marginally improved thermals.[5] The processor also contains 32 KB of data L1 cache and 48 KB of instruction L1 cache, alongside 1 MB of shared L2 cache.[4]
GPU
The Broadcom BCM2711 SoC features an upgraded GPU compared to previous iterations of Raspberry Pi, going from the VideoCore IV clocked at 400 MHz to the VideoCore VI clocked at 500 MHz. Alongside the faster clock rate, the VideoCore VI also includes its own memory manager, allowing it to access more memory than its predecessor.[4]
RAM
The Raspberry Pi 4 replaces the 1 GB of LPDDR2 with options for either 1 GB, 2 GB, 4 GB, or 8 GB of 2400 MHz LPDDR4. The 8 GB Pi 4 released a year after the other models.[6]
IO
Numerous improvements were introduced to IO functionality with the Raspberry Pi 4. The USB was upgraded, going from four USB 2.0 ports to two USB 3.0 ports and 2 USB 2.0 ports. A dedicated ethernet controller on the BCM2711 SoC allowed for the addition of gigabit ethernet. The singular full-sized HDMI port on the Raspberry Pi 3 has also been replaced with dual micro-HDMI connectors.[1][7]
References
- ^ a b "Raspberry Pi 4 Datasheet" (PDF). Raspberry Pi Datasheets. 21 June 2019. Retrieved 3 October 2023.
- ^ Ltd, Raspberry Pi. "Buy a Raspberry Pi 4 Model B". Raspberry Pi. Retrieved 4 October 2023.
- ^ Upton, Eben (28 September 2023). "Introducing: Raspberry Pi 5!". Raspberry Pi. Retrieved 4 October 2023.
- ^ a b c "Raspberry Pi Documentation - Processors". www.raspberrypi.com. Retrieved 4 October 2023.
- ^ "Raspberry Pi 4 model Bs arriving with newer 'C0' stepping | Jeff Geerling". www.jeffgeerling.com. Retrieved 4 October 2023.
- ^ Upton, Eben (28 May 2020). "8GB Raspberry Pi 4 on sale now at $75". Raspberry Pi. Retrieved 4 October 2023.
- ^ "Raspberry Pi 3B+ Reduced Schematics" (PDF). Raspberry Pi Datasheets. 19 March 2018. Retrieved 4 October 2023.