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The CoolDeck is a precision machined copper plate that allows you to mount an additional heatsink to your Valve Steam Deck. When combined with an efficient heatsink / fan setup you can significantly reduce temperatures of the APU. The CoolDeck works in conjunction with the original heatsink / fan.

Installing this modification requires voiding your Steam Deck warranty and cutting a somewhat large hole in the back cover. I am not responsible for any damage caused by incorrect installation.

Installation instructions are available to download below under "datasheet." Refer to the pictures for correct thermal pad locations and thicknesses.

While I have only tested M.2 heatsinks with a 40mm fan, the new flat top can accommodate a wider variety of heatsinks. The flat exposed surface is 45mm wide. Heatsink is secured to the new copper plate by soldering or thermal epoxy (not included.)

A 3D printable mount for a 40mm x 10 fan is available to download here: fan mount

There are 2 ways to power an external 5v fan:

1. A fan with USB power cord is easiest and simplest. A USB-A to USB-C adapter can be used to power the fan off the Steam Deck, or portable USB charger can be used.

2. Powering the external fan off the Steam Deck requires cutting and splicing the new fan wires to the existing fan wires. These wires are very small and short so care should be taken.

Features:

• Solid 101 copper
• Significantly reduced internal temperatures when combined with an efficient heatsink / fan setup.
• Includes high quality pink / blue thermal pads.
• All components that require cooling with thermal pads are covered by the plate.
• Thermal pads now cool the LPDDR5 RAM chips.
• Unobstructed access to internal storage and power / fan connectors.
• Replaces original EMI shield.
• Basic mounting hardware included; Optional countersunk screws & matching holes available for a completely flat top surface.
• Since new Steam Deck back covers are readily available, installation is 100% reversible.

What's included?

• CoolDeck v3 precision machined 101 copper heat distribution plate
• 8 thermal pads
• 3 M2 x 6mm stainless mounting screws
• 3 M2 stainless washers
• 2 dowel pins 1/16" x 1/2"

Optional countersunk screw option has the 3 mounting holes of the Cooldeck countersunk and includes three M2 x 6mm countersunk screws with 1.3mm allen key.

What's required?

• Heatsink
• Fan, mount, and wiring
• Thermal paste
• Thermal epoxy or solder / flux