MECCANIXITY 20x20mm 2mm Copper Shims Review: Who It Fits and Who Should Skip It

What stands out

• Made from pure copper for efficient heat spreading
• Dimensions of 20mm x 20mm x 2mm fit specific gaps
• Pre-applied thermal conductive adhesive tape for installation
• Withstands temperatures up to 160 degrees Celsius
• Surface may darken over time but cooling remains effective

Who it fits

Key specs for copper shims

Material: Copper

Copper is a metal with high thermal conductivity, meaning it moves heat away from components faster than most plastics or aluminum. You should choose this material if you need efficient heat spreading for small chips like GPU cores or VRMs. When shopping for thermal paste, look for similar conductive properties to ensure the shim works well with your cooling setup.

Dimensions: 20mm x 20mm x 2mm

These exact measurements define the footprint and height of each shim. The 20mm square size fits many small electronic components, while the 2mm thickness helps fill larger gaps between a chip and a heatsink. You should verify your component size before buying to ensure a proper fit. This differs from thin thermal pads used for standard CPU mounting.

Mounting Type: Thermal conductive adhesive tape

The shim uses a sticky backing that conducts heat, allowing you to attach it directly to hardware without screws. This makes installation simple for GPUs or memory modules where traditional mounting is impossible. You should clean the surface thoroughly before application to ensure strong adhesion and optimal heat transfer. This method is distinct from mechanical cooler mounting.

Compatible Device: Desktop computer GPU, CPU

This product is designed for use in desktop environments, specifically targeting graphics cards and central processing units. You should use these shims to improve cooling on specific hotspots rather than as a primary cooler. This is a supplementary accessory, not a replacement for a full CPU air cooler or liquid cooling loop for main processor heat dissipation.

Material, Size, And Weight

The listing states these shims are made of copper. Copper conducts heat well, so it moves warmth away from hot spots on chips and graphics cards. Each sheet measures 20mm by 20mm and is 2mm thick. This size fits small components like memory modules or bridge chips. The 2mm thickness adds a small gap, which helps if your cooler base is slightly uneven or too tall for your case. You get five sets in one package, giving you enough material for multiple areas or replacements.

According to the listing, the shims use thermal conductive adhesive tape on the back. You peel off the protective layer and stick the copper sheet directly to the component. This mounting type means you do not need screws or clips. It is a simple, low-profile solution for spaces where hardware cannot be bolted down. The package weighs 1.41 ounces. This light weight makes the shims easy to handle during installation without adding bulk to your build.

The listing notes that the copper surface will darken when exposed to air. This is a normal chemical reaction and does not reduce cooling performance. If you prefer a shiny look, you can gently sand the surface with fine sandpaper. The adhesive backing is designed to withstand temperatures up to 160 degrees Celsius. This durability ensures the shim stays in place under heavy loads. You should use these shims on desktop GPU or CPU components that need extra heat transfer without modifying the main cooler structure.

Setup And Everyday Use Guide

Installation is straightforward because the shims use a thermal conductive adhesive backing. You peel the protective layer from the sticky tape and press the copper sheet onto the target component. This method requires no screws or brackets, making it suitable for tight spaces inside a desktop computer. The product is designed for cooling chips, notebook components, north and south bridges, and memory modules that lack dedicated cooling solutions. It also works on desktop GPU and CPU areas where direct contact heat transfer is needed. The adhesive allows for a secure bond without additional hardware. Once applied, the copper sheet transfers heat from the electronic component to the shim, which then dissipates the warmth into the surrounding air. Daily maintenance is minimal. The listing notes that the copper surface may darken when exposed to air over time. This oxidation does not reduce the cooling performance. If you prefer a cleaner look, you can gently sand the surface with fine sandpaper to restore brightness. The shims can withstand temperatures up to 160 degrees Celsius, ensuring durability during regular operation. The package includes five sets of these 20mm by 20mm sheets, allowing you to treat multiple components simultaneously. The 2mm thickness provides a solid thermal bridge without adding excessive bulk. This setup is ideal for users who need a simple, spec-driven solution to improve heat dissipation on small, hot spots within their system.

Before You Buy These Shims

You need to verify the target surface is flat before applying these shims. The 2mm thickness adds significant height, so ensure your surrounding components have adequate clearance. You should also check that the thermal adhesive bonds well to your specific material, as some plastics may not hold the tape securely. Regular upkeep involves inspecting the adhesive edges for peeling, especially if the unit experiences frequent temperature cycles. If the copper surface darkens, you can lightly sand it to restore appearance, though this does not impact performance. These shims serve as a supplemental cooling aid rather than a primary solution. They fit best alongside robust CPU air coolers or high-quality thermal paste applications. Use them to bridge gaps between chips and heatsinks or to enhance heat dissipation on small electronic parts like northbridge chips or memory modules. They do not replace active cooling but extend component life by spreading heat more effectively across the copper sheet.

Check before you buy

• Verify surface flatness for proper adhesive contact
• Check clearance for the added 2mm height
• Ensure thermal paste compatibility if used with heatsinks
• Confirm adhesive bond strength on your specific material

The product at a glance

1

MECCANIXITY 20x20mm 2mm Copper Shims

Best for: Cooling small chips and memory modules

Material

Copper

Compatible Device

Desktop computer GPU, CPU

Dimensions

20mm x 20mm x 2mm

Mounting Type

Thermal conductive adhesive tape

Weight

1.41 ounces

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This MECCANIXITY shim is a 20 by 20 millimeter copper sheet with a 2 millimeter thickness. It includes a thermal conductive adhesive backing for direct attachment to hardware. The copper material transfers heat from small electronic components like GPUs or CPUs. It withstands temperatures up to 160 degrees. You get five sets in the package. This simple passive cooling aid suits users needing extra thermal mass for specific chips.

Pros

• Pure copper material for efficient heat transfer
• 2 millimeter thickness provides substantial thermal mass
• Includes thermal conductive adhesive tape for easy installation
• Withstands high temperatures up to 160 degrees
• Package contains five sets for multiple applications

Cons

• Surface darkens when exposed to air
• Only suitable for small electronic components
• Requires sanding to restore surface appearance

Good fit if

• You need to cool specific small chips like memory modules
• You want to add thermal mass to a GPU or CPU area
• You prefer a simple adhesive mounting method without screws

Skip if

• You need a large surface area for a main heatsink
• You require a fan or active cooling solution
• You want a shim that does not change color over time

Verdict: MECCANIXITY 20mm Copper Shim, 2mm Thick is a straightforward passive cooling add-on for users targeting specific hotspots on small components. It fits those who need simple, high-mass thermal transfer without complex mounting hardware.

Specifications side by side

Frequently asked questions

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