Flat Heat Pipe 4mm x 14mm x 120mm Copper Heatsink Pipe - Thin Fanless

In this review of the Flat Heat Pipe from Bopaodao, the bottom line is simple: this slim, single-piece copper tube is for DIYers and small-system builders who need an unobtrusive, passive way to move heat from a chip to a remote heatsink. The reviewer found it most useful when space is tight and a traditional heat sink or fan cannot be fitted; made from near-pure copper and offered in a precise 4mm by 14mm cross section and 120mm length, it is designed to conduct and spread heat quietly without adding moving parts.

Key Features

• Pure copper construction: Made from 99% pure copper to provide strong thermal conductivity for faster heat transfer from CPU, GPU, or memory chips to a heatsink.
• Compact flat profile: The 4mm thickness and 14mm width give a low-profile form factor that fits under backplates and inside laptop or slim PC layouts.
• Length for reach: The 120mm length lets installers bridge chips to distant sinks or backplates without bulky tubing or fans.
• Customizable shaping: The part can be bent and flattened to fit specific routing needs, making it suitable for bespoke cooling arrangements.
• Tight manufacturing tolerances: Size deviations are small (about 0.2mm thickness and 0.5mm length), which helps with predictable fits in compact assemblies.
• Passive operation: It requires no power or moving parts, so it adds cooling quietly in fanless or low-noise builds.

Who It's For

This heat pipe is best for hobbyists, PC modders, and repair technicians who need a slim, passive conductor to move heat between components in cramped spaces such as laptops, small form factor desktops, or custom electronics enclosures. It is also useful for anyone building a fanless cooling solution or improving thermal contact to a backplate or external heatsink.

It is not aimed at users wanting a complete cooling assembly with mounting hardware or pre-installed fittings; those who need active cooling, thermal interface kits, or bolt-on drop-in replacements should look for full heatsink assemblies or fan modules instead.

Pros & Cons

Pros

• High thermal conductivity from near-pure copper helps disperse chip heat effectively without a fan.
• Low-profile 4mm thickness and 14mm width fit under backplates and inside thin devices.
• Custom bending and flattening service allows tailored installation and routing in tight layouts.
• Simple, passive design means zero noise and no electrical connections required.

Cons

• Sold as a single piece with no mounting hardware, so additional brackets or thermal interface materials are needed for most installs.
• The product is purely a conductor and will not replace an active cooler for high TDP chips on its own.

Specifications

Brand	Bopaodao
Material	99% pure copper
Thickness (T)	0.02 in / 4mm (approx), +/- 0.2mm
Width (W)	0.55 in / 14mm
Length (L)	4.72 in / 120mm, +/- 0.5mm
Units	1 piece per order
Customization	Bending and flattening service available on request

Our Verdict

For those building or repairing compact systems, the Bopaodao flat heat pipe is a cost-effective, high-conductivity option to move heat quietly to a remote heatsink or backplate. It is good value when paired with appropriate mounting and thermal interface materials, but users needing complete active cooling should combine it with a heatsink or fan rather than expect it to be a standalone thermal solution.

Frequently Asked Questions

Can this be used inside a laptop?
Yes, its low-profile 4mm thickness and 14mm width are intended for tight internal spaces like laptops and slim PCs, provided there is a suitable surface or backplate to receive the heat.

Is mounting hardware included?
No, the item is a single heat pipe piece only; additional adhesives, pads, or brackets will be required for most installations.

Can you request custom bends?
Yes, the seller offers bending and flattening services if you message with requirements before ordering.