The Raspberry Pi foundation is working on yet another model of the popular Raspberry Pi boards, as the Raspberry Pi 3 model B board has showed up on the FCC website. The new board looks very similar to Raspberry Pi 2 model B, but adds on-board WiFi 802.11 b/g/n (2.4GHz only) and Bluetooth 4.0. Let’s play “spot the difference” with Raspberry Pi 2 at the top and Raspberry Pi 3 under.
The processor looks the same as the BCM2836 quad core Cortex A7 SoC found on model 2 B, but one redditer claims it could be a 64-bit processor due to some MagPi ad. [Update: that’s the MagPi ad which confirms Raspberry Pi 3 will feature a 64-bit ARM processor @ 1.2 GHz. Thanks Gabe!
We’ll find the WiFi/BT chip antenna on the top left corner, and two through holes on the right of the 40-pin connectors, likely the RUN header for reset that can be found on the RPi2 where the chip antenna is now placed on RPi 3. So the through holes are not new, they’ve just moved it. All connectors have the exact same placement between the two versions. Let’s check out the other side of the board.
The wireless module (likely Broadcom based) can be found just above the micro SD slot, and J5 connector is soldered. J5 is the JTAG connector, so it will probably not be soldered with the version that ships. The picture is not very clear but it looks like they’ve used the same Elpida B8132B4PB-8D-F RAM chip (1GB) as on Raspberry Pi 2. So although we can’t be 100% certain right now, the RAM appears to be the same, and the processor is still connected to a similar USB to Ethernet chip, so they’ve probably kept the same architecture, expect
possibly for the CPU core. So the only major changes on Raspberry Pi 3 appears to be built-in WiFi and Bluetooth, and 64-bit ARM cores (likely Cortex A53).