We have a surprise for you today: Raspberry Pi 4 is now on sale, starting at $35. This is a comprehensive upgrade, touching almost every element of the platform. For the first time we provide a PC-like level of performance for most users, while retaining the interfacing capabilities and hackability of the classic Raspberry Pi line.
Here are the highlights:
And here it is in the flesh:
This is the first time we’re offering a choice of memory capacities. We’ve gone for the following price structure, retaining our signature $35 price for the entry-level model:
As always these prices exclude sales tax, import duty (where appropriate), and shipping. All three variants are launching today: we have initially built more of the 2GB variant than of the others, and will adjust the mix over time as we discover which one is most popular.
At first glance, the Raspberry Pi 4 board looks very similar to our previous $35 products, all the way back to 2014’s Raspberry Pi 1B+. James worked hard to keep it this way, but for the first time he has made a small number of essential tweaks to the form factor to accommodate new features.
We’ve moved from USB micro-B to USB-C for our power connector. This supports an extra 500mA of current, ensuring we have a full 1.2A for downstream USB devices, even under heavy CPU load.
To accommodate dual display output within the existing board footprint, we’ve replaced the type-A (full-size) HDMI connector with a pair of type-D (micro) HDMI connectors.
Our Gigabit Ethernet magjack has moved to the top right of the board, from the bottom right, greatly simplifying PCB routing. The 4-pin Power-over-Ethernet (PoE) connector remains in the same location, so Raspberry Pi 4 remains compatible with the PoE HAT.
All three connectors on the right-hand side of the board overhang the edge by an additional millimetre, with the aim of simplifying case design. In all other respects, the connector and mounting hole layout remains the same, ensuring compatibility with existing HATs and other accessories.
To support Raspberry Pi 4, we are shipping a radically overhauled operating system, based on the forthcoming Debian 10 Buster release. This brings numerous behind-the-scenes technical improvements, along with an extensively modernised user interface, and updated applications including the Chromium 74 web browser. Simon will take an in-depth look at the changes in tomorrow’s blog post, but for now, here’s a screenshot of it in action.
One notable step forward is that for Raspberry Pi 4, we are retiring the legacy graphics driver stack used on previous models. Instead, we’re using the Mesa “V3D” driver developed by Eric Anholt at Broadcom over the last five years. This offers many benefits, including OpenGL-accelerated web browsing and desktop composition, and the ability to run 3D applications in a window under X. It also eliminates roughly half of the lines of closed-source code in the platform.
Connector and form-factor changes bring with them a requirement for new accessories. We’re sensitive to the fact that we’re requiring people to buy these: Mike and Austin have worked hard to source good-quality, cost-effective products for our reseller and licensee partners, and to find low-cost alternatives where possible.
Good, low-cost USB-C power supplies (and USB-C cables) are surprisingly hard to find, as we discovered when sending out prototype units to alpha testers. So we worked with Ktec to develop a suitable 5V/3A power supply; this is priced at $8, and is available in UK (type G), European (type C), North American (type A) and Australian (type I) plug formats.
Again, low-cost micro HDMI cables which reliably support the 6Gbps data rate needed for 4Kp60 video can be hard to find. We like the Amazon Basics cable, but we’ve also sourced a 1m cable, which will be available from our resellers for $5.
At the end of last year, Raspberry Pi Press released the Official Raspberry Pi Beginner’s Guide. Gareth Halfacree has produced an updated version, covering the new features of Raspberry Pi 4 and our updated operating system.
Bringing all of this together, we’re offering a complete Desktop Kit. This is priced at $120, and comprises:
This is the first product launch following the opening of our //www.google.com/maps/place/Raspberry+Pi+Storefirstname.lastname@example.org,0.1190733,17z/data=!3m2!4b1!5s0x47d87097c88a6687:0x7edf0a3ad630cf30!4m5!3m4!1s0x47d8710c07899a87:0xd98d392d991f967f!8m2!3d52.2043096!4d0.121262" style="color: rgb(198, 25, 49); text-decoration-line: underline;">store in Cambridge, UK. For the first time, you can come and buy Raspberry Pi 4 directly from us, today. We’ll be open from 8am to 8pm, with units set up for you to play with and a couple of thousand on hand for you to buy. We even have some exclusive launch-day swag.
New Raspberry Pi silicon
Since we launched the original Raspberry Pi in 2012, all our products have been based on 40nm silicon, with performance improvements delivered by adding progressively larger in-order cores (Cortex-A7, Cortex-A53) to the original ARM11-based BCM2835 design. With BCM2837B0 for Raspberry Pi 3B+ we reached the end of that particular road: we could no longer afford to toggle more transistors within our power budget.
Raspberry Pi 4 is built around BCM2711, a complete re-implementation of BCM283X on 28nm. The power savings delivered by the smaller process geometry have allowed us to replace Cortex-A53 with the much more powerful, out-of-order, Cortex-A72 core; this can execute more instructions per clock, yielding performance increases over Raspberry Pi 3B+ of between two and four times, depending on the benchmark.
We’ve taken advantage of the process change to overhaul many other elements of the design. We moved to a more modern memory technology, LPDDR4, tripling available bandwidth; we upgraded the entire display pipeline, including video decode, 3D graphics and display output to support 4Kp60 (or dual 4Kp30) throughput; and we addressed the non-multimedia I/O limitations of previous devices by adding on-board Gigabit Ethernet and PCI Express controllers.
We’ll keep updating this list over the next couple of days, but here are a few to get you started.
Wait, is it 2020 yet?
In the past, we’ve indicated 2020 as a likely introduction date for Raspberry Pi 4. We budgeted time for four silicon revisions of BCM2711 (A0, B0, C0, and C1); in comparison, we ship BCM2835C2 (the fifth revision of that design) on Raspberry Pi 1 and Zero.
Fortunately, 2711B0 has turned out to be production-ready, which has taken roughly 9–12 months out of the schedule.
Are you discontinuing earlier Raspberry Pi models?
No. We have a lot of industrial customers who will want to stick with the existing products for the time being. We’ll keep building these models for as long as there’s demand. Raspberry Pi 1B+, 2B, 3B, and 3B+ will continue to sell for $25, $35, $35, and $35 respectively.
What about a Model A version?
Historically, we’ve produced cut-down, lower-cost, versions of some of our $35 products, including Model 1A+ in 2014, and Model 3A+ at the end of last year. At present we haven’t identified a sensible set of changes to allow us to do a “Model 4A” product at significantly less than $35. We’ll keep looking though.
What about the Compute Module?
CM1, CM3, and CM3+ will continue to be available. We are evaluating options for producing a Compute Module product based on the Raspberry Pi 4 chipset.
Are you still using VideoCore?
Yes. VideoCore 3D is the only publicly documented 3D graphics core for ARM‑based SoCs, and we want to make Raspberry Pi more open over time, not less.