The final revision of The third-generation single-board computer
1.4GHz 64-bit quad-core processor, dual-band wireless LAN, Bluetooth 4.2/BLE, faster Ethernet, and Power-over-Ethernet support (with separate PoE HAT)
With the ARMv8 processor it can run the full range of ARM GNU/Linux distributions, including Snappy Ubuntu Core, as well as Microsoft Windows 10 IoT edition.
You will need the latest NOOBS image for the Wireless LAN and Bluetooth drivers to be installed. We sell a pre-imaged NOOBS card here
Faster processing
Improved thermals on the Pi 3 B+ means that the CPU on the BCM2837 SoC can now run at 1.4GHz, a 17% increase on the previous Pi 3 model (which ran at 1.2GHz).
Video performance on Pi 3 B+ is similar to the previous generation Pi 3, the VideoCore being clocked at 400MHz for video processing and the 3D graphics processor running at 300MHz.
Faster wireless
A significant change on the Pi 3 B+ compared to the Pi 3 is the inclusion of a new faster, dual-band wireless chip (CYW43455) with 802.11 b/g/n/ac wireless LAN and Bluetooth 4.2.
The dual-band 2.4GHz and 5GHz wireless LAN enables faster networking with less interference (although the higher bandwidth has less range), and the new PCB antenna technology should allow better reception.
Bluetooth allows you to use a wireless keyboard/trackpad without extra dongles, keeping things nice and tidy.
Faster ethernet
The Pi 3 B+ has significantly faster wired networking, thanks to an upgraded USB/LAN chip, and you should see speeds that are 3-5x faster than on previous models of the Pi, at least 300Mbit/s.