Raspberry Pi Project an advanced version of the Raspberry Pi 4 board that comes with 8 GB of RAM. The cost of the new board option $75. For comparison, boards with 2 and 4 GB of RAM are sold for $35 and $55, respectively.
The board's BCM2711 chip allows addressing up to 16 GB of memory, but at the time the board was developed last year, there were no suitable LPDDR4 SDRAM chips for sale. Micron has now released the required 8 GB chips that are the basis for the new Raspberry Pi 4 variant. Delivering a more power-hungry 8 GB LPDDR4 SDRAM chip also required some power upgrades and moving the switching converter from the area next to the USB 2.0 connectors to the area next to USB-C
Recall that the Raspberry Pi 4 board is equipped with a BCM2711 SoC and includes four 64-bit ARMv8 Cortex-A72 cores running at 1.5GHz and a VideoCore VI graphics accelerator that supports OpenGL ES 3.0 and is capable of decoding H.265 video with quality 4Kp60 (or 4Kp30 on two monitors). The board is equipped with LPDDR4 memory, PCI Express controller, Gigabit Ethernet, two USB 3.0 ports (plus two USB 2.0 ports), two Micro HDMI (4K) ports, 40-pin GPIO, DSI (touch screen connection), CSI (camera connection) and 802.11ac wireless chip, 2.4GHz and 5GHz bands, and Bluetooth 5.0. Power can be supplied via a USB-C port (formerly USB micro-B), via GPIO, or via an optional PoE HAT (Power over Ethernet) module. In performance tests, Raspberry Pi 4 outperforms Raspberry Pi 3B+ by 2-4 times, and Raspberry Pi 1 by 40 times.
Source: opennet.ru