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Hardware

Raspberry Pi 4 Model B - Specifications

• Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz
• 1GB, 2GB or 4GB LPDDR4-3200 SDRAM (depending on model)
• 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, Bluetooth 5.0, BLE
• Gigabit Ethernet
• 2 × micro-HDMI ports (up to 4kp60 supported)
• 4-pole stereo audio and composite video port
• H.265 (4kp60 decode), H264 (1080p60 decode, 1080p30 encode)
• OpenGL ES 3.0 graphics
• Micro-SD card slot for loading operating system and data storage
• 5V DC via USB-C connector (minimum 3A*)
• 5V DC via GPIO header (minimum 3A*)
• Power over Ethernet (PoE) enabled (requires separate PoE HAT)

Full Specifications: Here

Overclocking Raspberry Pi

DO AT YOUR OWN RISK. Make sure to have heatsinks & at least a small fan to overcome any heating issues.

Overclocking Recommended Requirements:

• CPU Heatsink
• RAM Heatsink
• ??? Heatsink
• Small Fan (mounted on top of raspberry pi)

Raspberry Pi Information:

• Voltage increased due to overclocking
• Stock CPU speed: 1.5 GHz
• Stock GPU speed: 500 Mhz

Known Overclocking Limitations:

• Max Voltage: 6 V
• Max CPU speed: 2.147 GHz
• Max GPU speed: 750 Mhz

Insert microSD card to a PC and open file config.txt, then add the following:

over_voltage=6
arm_freq=2000
gpu_freq=600

Truth is, you can start with over_voltage=2 (+0.05 V) then increase it by a step of 1 until the Raspberry Pi boots up properly. Anything above an over_voltage=6 will not be benefit you.

Note: Every increase in voltage represents an increase of $over_voltage * 0.025V$ more power (V). For instance, when over_voltage=3, total voltage load increases by 0.075 V.

Source: https://www.tomshardware.com/reviews/raspberry-pi-4-b-overclocking,6188.html