The Raspberry Pi 3 has a Broadcom BCM2837 SoC incorporating a Quad-core ARMv8 Cortex-A53 [64 bit] CPU @ 1.2GHz and VideoCore IV GPU @ 400MHz, and comes with 1GB LPDDR2 SDRAM @ 900MHz. This revised and upgraded ARM single board computer succeeds the Raspberry Pi (2), and is considerably quicker and a lot more powerful. Wi-Fi and Bluetooth are now included on-board.
Slackware for the 64bit ARM/AArch64 platform (named 'Slackware AArch64' or 'SA64' for short) has support for the Raspberry Pi 3 directly integrated.