6 Best Alternatives to the MECCANIXITY Heatsink Copper Sheet Shim (2026)
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Finding suitable meccanixity heatsink copper sheet shim alternatives helps you match your hardware to the correct thermal interface. The original MECCANIXITY 15x15mm shim provides copper construction with pre-applied thermal conductive adhesive tape to fill 1mm gaps on small ICs. It withstands temperatures up to 160 degrees across desktop chips, graphic cards, and memory modules. However, you might need different dimensions, a different brand, or alternative mounting features for your hardware.
Your build might require thinner profiles such as 0.3mm or 0.5mm, larger 20x20mm dimensions, or taller heatsinks for VRM components. You may also need an active cooler with a fan for desktop sockets, or combined copper and aluminum parts for single-board computers. The 6 alternatives featured here were chosen because their specifications overlap directly with the original shim. Reviewing these published measurements helps you choose the proper material, thickness, and footprint for your cooling project in 2026.
Our top pick: MECCANIXITY 15x15mm 1mm Copper Shims.
Comparing Copper Shim and Cooler Alternatives
MECCANIXITY 0.5mm 20x20mm Copper Shim Pads
The MECCANIXITY 20x20mm shim provides a wider 0.79-inch footprint compared to the 15x15mm original. It drops the thickness down from 1mm to 0.5mm, making it suitable for tighter physical spaces. Like the baseline product, it uses pure copper with pre-applied thermal conductive adhesive tape rated to withstand temperatures up to 160 degrees. You give up the extra vertical fill required for 1mm thermal gaps, as well as the narrower 15mm layout designed for smaller circuit boards. You should choose this model if you need to transfer heat from broader GPU dies or desktop components where vertical clearance between parts is limited to 0.5mm.
MECCANIXITY 0.3mm 20x20mm Copper Shims
This MECCANIXITY copper shim reduces thickness down to 0.3mm while expanding the surface area to 20x20mm, or 0.79 inches across. That represents a significantly lower profile than the 1mm baseline while offering broader component coverage than 15x15mm. It retains the same copper construction, peel-and-stick thermal conductive tape, and 160-degree heat rating. You sacrifice the bulk thickness needed to span wider gaps, meaning it cannot fill standard 1mm component voids. You should pick this option instead of the original if you work on compact electronics or desktop GPU modules that require an ultra-thin thermal bridge to contact a heatsink without adding unnecessary stack height.
Easycargo 15x15x0.5mm Copper Shims 20-Pack
The Easycargo pack matches the original 15x15mm footprint exactly, measuring 0.59 inches on each side. It differs by cutting the thickness in half to 0.5mm and supplying 20 pieces instead of 5 sets. It features copper material and pre-applied thermal conductive tape, with specified support for laptops, GPUs, and RAM modules. You give up the thicker 1mm depth provided by the original MECCANIXITY shims, making it inadequate for wide spaces. Pick this alternative if you need to service multiple hardware parts simultaneously, such as individual laptop chips or RAM modules, where a 0.5mm copper interface matches your mounting tolerances.
Easycargo 20-Piece Copper and Aluminum Heatsink Kit
This 20-piece kit shifts from flat copper plates to standalone heatsinks designed for Raspberry Pi hardware. Instead of a flat 1mm profile, these parts stand 0.28 inches tall and combine copper with aluminum pieces across a 0.55-inch width and length. They include thermal tape for direct mounting without extra fasteners. You give up the slim 1mm form factor needed to bridge gaps under existing heatsinks, and you lose an all-copper set. Choose this kit if you are outfitting an uncooled single-board computer like a Raspberry Pi and need multi-piece passive radiators rather than a flat thermal shim between components.
AMD Wraith Prism RGB CPU Cooler
The AMD Wraith Prism is a dedicated active processor cooler rather than a passive copper spacer. Built for AM4 motherboard sockets, it features an integrated fan, copper base construction, and RGB lighting. At 1 pound and measuring 9.45 inches long, it handles full desktop CPU heat dissipation directly. You give up the tiny 15x15x1mm footprint, lightweight 0.35-ounce profile, and flexible placement on ICs, notebooks, or memory modules. Select this cooler instead of the MECCANIXITY shims if you are building or upgrading an AM4 desktop system that requires a full fan-driven heatsink assembly to cool the main central processor.
Easycargo 9mm Copper VRM Heatsinks
This 10-pack of Easycargo copper heatsinks delivers individual cooling blocks designed specifically for VRMs and MOSFETs. Measuring 9x9mm with a 4mm height (0.35 by 0.35 by 0.16 inches), they use raised copper structures rather than a flat 1mm sheet. Like the original, they feature copper construction and pre-applied thermal conductive tape. You give up the larger 15x15mm contact surface and the flat low-clearance design of the 1mm shim. You should choose these mini-heatsinks instead of the MECCANIXITY shim if you have at least 4mm of vertical room to dissipate heat from individual power delivery chips or GPU voltage regulators.
Quick picks
Our 7 picks
MECCANIXITY 15x15mm 1mm Copper Shims
Best for: filling 1mm gaps on small ICs
- Material
- Copper
- Compatible Device
- Desktop Computer CPU
- Dimensions
- 15mm x 15mm, 1mm thickness
- Mounting Type
- Thermal Conductive Adhesive Tape
- Weight
- 0.35 ounces
MECCANIXITY 15x15mm 1mm Copper Shim is a solid copper thermal pad set designed for small electronic components. You get five 15mm by 15mm copper shims paired with thermal conductive adhesive tape, rated to handle temperatures up to 160 degrees. It suits you if you need to bridge a 1mm gap across compact hardware such as desktop chipsets, memory modules, or small ICs that lack integrated cooling.
Pros
- Copper construction rated for temperatures up to 160 degrees
- Includes thermal conductive adhesive tape for direct mounting
- Package includes 5 sets of shims and adhesive pads
- Precise 1mm thickness for bridging hardware gaps
Cons
- Copper surface darkens over time when exposed to air
- Surface area is limited to 15mm by 15mm
Good fit if
- You need a 1mm thick spacer for small processors or memory chips.
- You want thermal adhesive tape bundled with your copper shims.
Skip if
- You require cooling pads larger than 15mm by 15mm.
- You need thinner spacing such as 0.3mm or 0.5mm.
Verdict: MECCANIXITY 15x15mm 1mm Copper Shim delivers simple, direct heat transfer with pre-cut adhesive for small desktop chips. It is a practical fit when you need a 1mm copper thermal interface rated up to 160 degrees.
MECCANIXITY 0.5mm 20x20mm Copper Shim Pads
Best for: 0.5mm component gap heat transfer
- Material
- Copper
- Compatible Device
- Desktop computer GPU, CPU
- Dimensions
- 20mm x 20mm x 0.5mm
- Mounting Type
- Thermal conductive adhesive tape
- Length
- 0.79 inches
- Width
- 0.79 inches
This pack includes five MECCANIXITY copper shims measuring 20mm by 20mm with 0.5mm thickness. Each shim features pre-applied thermal conductive adhesive tape for direct mounting onto chips, graphics cards, processors, or memory modules. The copper material withstands temperatures up to 160 degrees. You get a set suited for bridging small 0.5mm gaps in desktop systems and notebooks without requiring separate thermal tape application.
Pros
- Pre-applied thermal conductive adhesive backing
- Copper construction handles temperatures up to 160 degrees
- Includes five 20mm by 20mm pads per pack
Cons
- Fixed 0.5mm thickness restricts gap adjustment
- Copper surface darkens when exposed to air
- Pack limited to five pieces
Good fit if
- You need 0.5mm copper shims with pre-applied adhesive tape.
- You cool desktop GPUs, CPUs, or notebook memory modules.
Skip if
- You require gap clearance different from 0.5mm.
- You need bare copper pads without adhesive backing.
Verdict: MECCANIXITY 0.5mm 20x20mm Copper Shims provide direct thermal gap filling with pre-applied adhesive tape for 0.5mm component spaces. Copper structure handles heat up to 160 degrees across small ICs and desktop chips.
MECCANIXITY 0.3mm 20x20mm Copper Shims
Best for: tight 0.3mm gaps on small electronics
- Material
- Copper
- Compatible Device
- Desktop computer GPU, CPU
- Dimensions
- 20mm x 20mm x 0.3mm
- Mounting Type
- Thermal conductive adhesive tape
- Length
- 0.79 inches
- Width
- 0.79 inches
You get five 20mm by 20mm copper shims with pre-applied thermal conductive adhesive tape. Each shim measures 0.3mm thick and tolerates temperatures up to 160 degrees. Copper transfers heat away from desktop GPUs, CPUs, chipsets, and memory modules. This pack suits you if you need thin metal shims to close tight component gaps without applying separate thermal paste or adhesive.
Pros
- 0.3mm thickness fits narrow component gaps
- Pre-applied thermal conductive adhesive tape
- Withstands temperatures up to 160 degrees
- Pure copper material for heat dissipation
Cons
- Surface darkens when exposed to air
- Pack limited to 5 pieces
Good fit if
- You need a slim 0.3mm profile for tight thermal clearances.
- You want adhesive tape included for direct installation.
Skip if
- You need thicker spacers such as 0.5mm, 1mm, or 2mm.
- You require a bulk pack with more than 5 pads.
Verdict: MECCANIXITY 0.3mm 20x20mm Copper Shims provide direct thermal transfer across narrow gaps with peel-and-stick adhesive backing. They offer a dependable low-profile solution for heat-sensitive electronics up to 160 degrees.
Easycargo 15x15x0.5mm Copper Shims 20-Pack
Best for: bulk passive cooling on small IC chips
- Material
- Copper
- Cooling Method
- passive
- Compatible Device
- Laptop GPU CPU IC Chips VGA RAM
- Dimensions
- 15x15x0.5mm
- Mounting Type
- Pre applied adhesive tape backing
- Features
- Thermal Tape
This pack contains 20 copper shims measuring 15 by 15 mm with a 0.5 mm thickness. Each shim includes pre-applied 3M 8810 thermal conductive adhesive tape backing for mounting. You get passive cooling designed for laptop GPUs, CPUs, VRAM, and IC chips. It suits you if you need multiple ready-to-stick shims for component clearance without separate thermal tape.
Pros
- Includes 20 individual copper shims
- Pre-applied 3M 8810 thermal conductive adhesive backing
- Compact 15 x 15 mm footprint with 0.5 mm thickness
- Solid copper construction for passive heat transfer
Cons
- Fixed 0.5 mm thickness offers no variety within the pack
- Square 15 x 15 mm profile will not cover larger chip dies
Good fit if
- You need multiple 15 x 15 mm shims in one package.
- You want pre-applied adhesive tape to avoid manual tape cutting.
- You are cooling small surfaces like laptop GPUs, VRAM, or IC chips.
Skip if
- You need gaps filled that are thicker or thinner than 0.5 mm.
- You require component coverage larger than 15 x 15 mm.
Verdict: Easycargo 15x15x0.5mm Copper Shims with Tape provides 20 pre-taped copper pads designed for small component heat transfer. It simplifies installation on laptop chips and RAM where 0.5 mm spacing is required.
Easycargo 20-Piece Copper and Aluminum Heatsink Kit
Best for: Raspberry Pi boards and small IC chips
- Material
- Aluminum + Copper
- Compatible Device
- Raspberry Pi 5 4 3 boards
- Mounting Type
- Pre-applied adhesive tape backing
- Features
- Thermal Tape
- Dimensions
- 0.55 × 0.55 × 0.28 inches
- Weight
- 0.64 ounces
View on Amazon: Easycargo 20-Piece Copper and Aluminum Heatsink Kit
This kit provides 20 miniature heatsinks consisting of 15 aluminum pieces and 5 copper pad shims. Each heatsink features pre-applied thermal conductive adhesive tape for direct mounting without extra paste. Measuring 0.55 by 0.55 inches with a 0.28-inch height, these parts fit Raspberry Pi 5, 4, and 3 boards. You will find them suitable if you need multi-chip cooling across single-board computers, VRAM, IC chips, or motherboard chipsets.
Pros
- Includes 15 aluminum and 5 copper pad heatsinks
- Pre-applied thermal conductive adhesive tape backing
- Fits Raspberry Pi 5, 4, and 3 boards
- Compatible with VRAM, MOSFETs, and IC chips
Cons
- Contains only 5 copper shims out of 20 total pieces
- Fixed 0.28-inch height on 0.55 by 0.55-inch footprints
- Raspberry Pi board not included
Good fit if
- You want a mix of aluminum and copper heatsinks for Raspberry Pi boards.
- You require pre-applied thermal adhesive tape for quick installation.
- You need small passive coolers for IC chips, VRM, or memory chips.
Skip if
- You require an all-copper set of shims.
- You need thin, flat copper shims without fins or tall 0.28-inch profiles.
Verdict: Easycargo 20-Piece Aluminum and Copper Heatsink Kit delivers an assorted pack of adhesive-backed passive coolers tailored for Raspberry Pi single-board computers and small integrated circuits. Its combination of aluminum and copper pieces covers multiple surface chips without requiring separate thermal tape.
AMD Wraith Prism RGB CPU Cooler
Best for: AM4 desktop builds needing active CPU cooling
- Socket Compatibility
- AM2/ AM3/ AM3+ / AM4
- Material
- Aluminum with copper core base
- Compatible Device
- Desktop
- Dimensions
- 9.45"L x 27.17"W x 0.98"H
- Lighting
- RGB
- Features
- Fan
The AMD Wraith Prism is a complete desktop air cooler instead of a standalone copper shim. It combines an aluminum heatsink, a direct-contact copper core base, and integrated heat pipes. You get pre-applied thermal paste, RGB lighting, and a 4-pin connector with a switchable fan profile. It fits AMD sockets from AM2 through AM4, making it suitable if you need an active cooling unit for an AMD processor.
Pros
- Direct contact heat pipes with a copper core base
- Pre-applied thermal paste out of the box
- Switchable overclock fan profile
- Integrated RGB lighting with a 4-pin connector
Cons
- Supports AMD AM2 through AM4 sockets only with no Intel compatibility listed
- Full cooler footprint rather than a thin component shim
Good fit if
- You build or maintain a desktop using an AMD AM4, AM3+, AM3, or AM2 motherboard socket.
- You prefer an active heatsink and fan setup with pre-applied thermal paste.
Skip if
- You only require thin, bare copper sheet shims for tight component gaps.
- You need a cooling solution for an Intel processor socket.
Verdict: AMD Wraith Prism RGB CPU Cooler delivers an active aluminum and copper thermal solution for AM4 desktop builds. It provides direct contact heat pipes and integrated fan controls when flat copper shims are insufficient.
Easycargo 9mm Copper VRM Heatsinks
Best for: passive cooling on MOSFETs and VRMs
- Material
- Copper
- Cooling Method
- passive
- Compatible Device
- VRM GPU Stepper Driver MOSFET Regulators
- Dimensions
- 9mm x 9mm x 4mm
- Mounting Type
- Pre applied adhesive tape backing
- Features
- Thermal Tape
This Easycargo kit provides 10 miniature passive copper heatsinks measuring 9mm by 9mm by 4mm. Unlike flat shims, these units feature vertical height to dissipate heat from compact components like MOSFETs, stepper drivers, and VRMs. Pre-applied thermal conductive adhesive tape handles mounting directly to surfaces. You will find this setup practical if you need dedicated passive cooling blocks rather than flat gap-filling copper plates for high-heat motherboard or laptop circuits.
Pros
- Pure copper construction for passive heat dissipation
- Pre-applied thermal conductive adhesive tape backing
- Compact 9mm x 9mm footprint for tight component spacing
- Includes 10 heatsinks per pack
Cons
- 4mm profile requires more vertical clearance than flat shims
- Fixed 9mm footprint cannot be cut down to fit smaller dies
Good fit if
- You need passive copper cooling for MOSFETs, VRMs, or stepper drivers.
- You want pre-applied thermal adhesive for tool-free installation.
- You have at least 4mm of vertical clearance above the target component.
Skip if
- You require ultra-thin flat copper shims to bridge narrow gaps under existing coolers.
- You need heatsinks larger than 9mm by 9mm to cover broader chips.
Verdict: Easycargo 9mm Mini Copper VRM Heatsink 10-Pack delivers targeted passive cooling for power delivery hardware using pre-taped solid copper heatsinks. Choose it when you have 4mm of clearance to cool individual MOSFETs and voltage regulators.
Specifications side by side
| Spec | MECCANIXITY 15x15mm 1mm Copper Shims | MECCANIXITY 0.5mm 20x20mm Copper Shim Pads | MECCANIXITY 0.3mm 20x20mm Copper Shims | Easycargo 15x15x0.5mm Copper Shims 20-Pack | Easycargo 20-Piece Copper and Aluminum Heatsink Kit | AMD Wraith Prism RGB CPU Cooler | Easycargo 9mm Copper VRM Heatsinks |
|---|---|---|---|---|---|---|---|
| Socket Compatibility | not specified | not specified | not specified | not specified | not specified | AM2/ AM3/ AM3+ / AM4 | not specified |
| Material | Copper | Copper | Copper | Copper | Aluminum + Copper | Aluminum with copper core base | Copper |
| Cooling Method | not specified | not specified | not specified | passive | not specified | not specified | passive |
| Compatible Device | Desktop Computer CPU | Desktop computer GPU, CPU | Desktop computer GPU, CPU | Laptop GPU CPU IC Chips VGA RAM | Raspberry Pi 5 4 3 boards | Desktop | VRM GPU Stepper Driver MOSFET Regulators |
| Dimensions | 15mm x 15mm, 1mm thickness | 20mm x 20mm x 0.5mm | 20mm x 20mm x 0.3mm | 15x15x0.5mm | not specified | 9.45"L x 27.17"W x 0.98"H | 9mm x 9mm x 4mm |
| Mounting Type | Thermal Conductive Adhesive Tape | Thermal conductive adhesive tape | Thermal conductive adhesive tape | Pre applied adhesive tape backing | Pre-applied adhesive tape backing | not specified | Pre applied adhesive tape backing |
| Lighting | not specified | not specified | not specified | not specified | not specified | RGB | not specified |
| System Type | Desktop | Desktop | Desktop | not specified | not specified | Desktop | not specified |
| Features | Thermal Tape | Thermal Tape | Thermal Tape | Thermal Tape | Thermal Tape | Fan | Thermal Tape |
| Weight | 0.35 ounces | not specified | not specified | not specified | 0.64 ounces | 1 pounds | not specified |
| Length | not specified | 0.79 inches | 0.79 inches | 0.59 inches | not specified | not specified | not specified |
| Width | not specified | 0.79 inches | 0.79 inches | 0.59 inches | not specified | not specified | not specified |
| Size | 1mm | 0.5mm | 0.3mm | 15x15x0.5mm | not specified | 9.45"L x 27.17"W x 0.98"H | not specified |
| Model | mea231220ee000018 | mea231220ee000002 | mea231220ee000008 | NA | not specified | AM4 | ES-H12B141407 |
| Color | not specified | not specified | not specified | Copper Tone | Multicolored (20pcs) | Black | 10pcs 9x9x4mm Copper |
If you need to cool a standalone water pump, you can compare barrow d5 pump heatsink top alternatives.
Frequently asked questions
What is the thinnest copper shim available among these alternatives?
The MECCANIXITY 0.3mm copper shim is the thinnest option on the list. It measures 0.79 inches by 0.79 inches and includes pre-applied thermal adhesive tape. This shim transfers heat across narrow gaps in sensitive desktop and GPU electronics while remaining rated for temperatures up to 160 degrees.
Which copper shims work best for laptop and RAM cooling?
The Easycargo 15x15x0.5mm Copper Shims 20-Pack is specifically specified for laptop chips, RAM, and GPUs. These copper pads measure 0.59 inches long and 0.59 inches wide. They feature integrated thermal tape for simple installation, allowing you to bridge 0.5mm physical clearance gaps across multiple memory modules or compact mobile hardware.
Can you use passive copper heatsinks instead of flat shims on VRMs?
Yes, you can use the Easycargo 9mm Mini Copper VRM Heatsinks if you have at least 4mm of vertical clearance. Unlike flat shims, these heatsinks measure 0.35 inches wide, 0.35 inches long, and 0.16 inches high. They include pre-applied thermal tape and target power delivery hardware, specifically voltage regulators and GPU MOSFETs.
What cooling option is available if you need active airflow instead of copper shims?
The AMD Wraith Prism RGB CPU Cooler provides active fan-driven cooling for desktop processors. Designed for the AM4 socket, it incorporates direct contact copper heat pipes, integrated fan controls, and RGB lighting. You should select this active cooler when flat copper shims or small passive heatsinks do not provide enough heat dissipation for your desktop build.
Which alternative is designed for Raspberry Pi single-board computers?
The Easycargo 20-Piece Copper and Aluminum Heatsink Kit is tailored specifically for Raspberry Pi boards. This assorted pack includes both copper and aluminum passive coolers measuring 0.55 inches wide, 0.55 inches long, and 0.28 inches high. Each piece includes thermal tape, allowing you to cover multiple surface IC chips without needing extra adhesive supplies.
Do all of these copper shims require separate thermal tape?
No, none of the listed MECCANIXITY or Easycargo shims require you to buy separate thermal tape. The MECCANIXITY 1mm, 0.5mm, and 0.3mm shims, as well as the Easycargo copper packs, come with pre-applied thermal adhesive backing. This peel-and-stick design secures the copper directly onto your GPU, RAM, or desktop IC components during installation.
How do you choose between 15x15mm and 20x20mm copper shims?
You should match the shim dimensions to the surface area and clearance gap of your target chip. The 15x15mm MECCANIXITY and Easycargo shims fit smaller ICs, measuring roughly 0.59 inches per side. If your GPU or desktop processor has a wider area, the 20x20mm MECCANIXITY shims offer greater surface coverage in 0.5mm or 0.3mm thicknesses.