Recently Raspberry Pi released 8GB Raspberry Pi 4 is now available, priced at just $75. It offers ground-breaking increases in processor speed, multimedia performance, memory, and connectivity compared to the prior-generation Raspberry Pi 3 Model B+. I already publish a post when Raspberry Pi launched – Raspberry Pi 4 with faster CPU, dual-4K display support launched. So now Raspberry Pi is making different variants of the Raspberry Pi 4 available, depending on how much RAM you need — 2GB, 4GB, or 8GB.
- High-performance 1.5GHz Quad-Core 64-bit Arm® Cortex® A72 CPU
- Highest RAM for a Raspberry Pi (8GB)
- Dual-band 2.4GHz/5GHz Wi-Fi & Bluetooth 5.0 for faster connectivity
- High-speed Gigabit Ethernet Connector
- Rich I/O peripherals to further expand your projects
- Dual monitor support with up to 4K60P
- PoE Compatibility via a separate PoE HAT
These are common features of RPi. Let’s discuss , What’s New in this variant.
What else has changed?
To supply the slightly higher peak currents required by the new memory package, James has shuffled the power supply components on the board, removing a switch-mode power supply from the right-hand side of the board next to the USB 2.0 sockets and adding a new switcher next to the USB-C power connnector. While this was a necessary change, it ended up costing us a three-month slip, as COVID-19 disrupted the supply of inductors from the Far East.
What about 64-bit?
Raspbian is Default Operating system of Raspberry Pi. Raspbian uses a 32-bit LPAE kernel and a 32-bit userland. This allows multiple processes to share all 8GB of memory, subject to the restriction that no single process can use more than 3GB. For most users this isn’t a serious restriction, particularly since every tab in Chromium gets its own process. Sticking with a 32-bit userland has the benefit that the same image will run on every board from a 2011-era alpha board to today’s shiny new 8GB product.
Reference : https://www.raspberrypi.org/blog/8gb-raspberry-pi-4-on-sale-now-at-75/
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