Official Raspberry Pi Page
https://www.raspberrypi.com/products/raspberry-pi-5/
Key Specifications
CPU: 2.4-GHz, quad-core Arm Cortex-A76 (vs 1.8 GHz Cortex-A72)
GPU: 800 MHz VideoCore VII (vs 500 MHz VideoCore VI)
RAM: 4 / 8GB of LPDDR4X-4267 (vs LPDDR4-3200 SDRAM)
USB: 2x USB 3.0, 2x USB 2.0
Camera: 2 x 4-lane MIPI camera / display connectors (vs 1x camera, 1x display)
PCIe 2.0 connector: New for Pi 5
Power button: New for Pi 5
Real-time clock: New for Pi 5, requires battery
microSD card slot: Supports SDR104 (around twice as fast as the RPi4)
Wireless: 802.11ac + Bluetooth 5.0
Ethernet: Gigabit (PoE support with add-on hats)
Cooler: Built-in fan header, fan mounts
GPIO: 40-pin header
Video: 2x microHDMI, supporting 4K 60 Hz, HDR
Power: USB-C power port, required 5 volt, 3-amp PSU