Looking Beyond the Geekworm 12mm Aluminum CM4 Heatsink? 6 Alternatives Worth a Look

How alternatives compare to Geekworm

Easycargo 20-Piece Copper and Aluminum Heatsink Kit

The Easycargo kit shifts from a single large block to twenty small adhesive pads made of copper and aluminum. You get flexibility for various Raspberry Pi revisions rather than one dedicated CM4 solution. The pads are tiny, measuring 0.55 by 0.55 inches and 0.28 inches thick. This kit lacks the structural rigidity of the 12 mm Geekworm block and does not support a 30 mm fan. You should choose this if you need simple passive cooling for multiple boards or smaller form factors where a large heatsink would not fit. The adhesive application is straightforward, but you lose the option for active airflow assistance.

Geekworm Aluminum Passive Raspberry Pi 5 Heatsink

The Geekworm H509 targets the Raspberry Pi 5, not the CM4, so it is not a direct swap. It is a passive cooler with a 15 mm height, which is taller than the 12 mm CM4 block. This extra height provides more surface area for silent heat dissipation. The unit is larger at 2.5 inches long and weighs 1.55 ounces, compared to the lighter CM4 heatsink. You should pick this if you are building a Raspberry Pi 5 system and prioritize noise-free operation over a slim profile. It does not support fan mounting, relying entirely on passive convection. Check your case clearance before choosing this taller alternative.

Prolimatech Nano Aluminum Thermal Compound 1.5g

The Prolimatech PK-2 is a thermal compound, not a heatsink. It serves as the interface material between a CPU and a cooler, whereas the Geekworm block is the cooler itself. You need this paste to ensure efficient heat transfer from the processor to any aluminum block. The product comes in a 1.5-gram package designed for safe, quick application without curing time. It does not replace the heatsink function. You would use this paste with the Geekworm block or any other cooler to improve thermal conductivity. Choose this if you are building a custom cooling solution and need a reliable, electrically safe thermal interface material for your assembly.

Uxcell 100mm Aluminum Heatsink 5-Pack

The Uxcell 100mm heatsink is a bulk pack of five large aluminum blocks intended for low-power transistors and ICs. It is much larger than the CM4 heatsink, measuring 8 inches by 4.5 inches. This size makes it unsuitable for the compact Raspberry Pi Compute Module 4. You would use these for custom amplifiers or LED drivers where space is not a constraint. The Geekworm block is designed specifically for the CM4 footprint. You should only consider this Uxcell pack if you are cooling multiple discrete components elsewhere in your build. It offers no direct benefit for the CM4 due to its massive dimensions and lack of specific mounting features.

Dynatron K6 80mm 1U Server Fan

The Dynatron K6 is a 1U server fan and heatsink combo designed for LGA115x sockets in tight server chassis. It is built for high-density server environments, not Raspberry Pi modules. The unit measures 3.15 inches square with a 0.59 inch profile, offering PWM control for noise management. You cannot mount this on a CM4 motherboard. It is strictly for 1U server builds requiring active cooling for desktop processors. The Geekworm heatsink is a passive block with fan support for a specific single-board computer. You should choose the Dynatron only if you are constructing a 1U server and need a compact, active cooler for an Intel CPU.

Walfront 24-Fin Aluminum Heatsink

The Walfront 24-fin heatsink is a large 150mm aluminum block designed for high-power household and fish LED devices. It is a dedicated passive cooler for lighting hardware, not computer processors. The unit weighs 5.64 ounces and features 24 fins for increased surface area. It is far too large and improperly shaped for the Raspberry Pi CM4. You would use this for cooling LED drivers or similar lighting components. The Geekworm heatsink is compact and tailored for the CM4 motherboard. You should avoid this Walfront unit for computer cooling. It is intended for specific lighting applications where its large surface area can dissipate heat from high-wattage LEDs effectively.

Quick picks

Our 7 picks

1 Best overall

Geekworm 12mm Aluminum CM4 Heatsink

Best for: Passive CM4 cooling with added fan

Material

Aluminum alloy

Cooling Method

Passive Cooling

Compatible Device

Raspberry Pi Compute Module 4 CM4

Dimensions

54 x 39 x 12 mm

Features

Fan

Weight

0.71 ounces

View on Amazon: Geekworm 12mm Aluminum CM4 Heatsink Affiliate link

This Geekworm C235 heatsink uses 12 mm thick aluminum alloy to passively cool the Raspberry Pi Compute Module 4. The unit measures 54 x 39 x 12 mm and weighs 30 g. It includes a thermal pad you must trim to fit the CPU. You can add a 30 mm fan above it for active cooling. It is a solid passive option for standard CM4 builds.

Pros

• 12 mm thick aluminum alloy construction
• Compact 54 x 39 x 12 mm footprint
• Supports 30 mm fan for active cooling
• Includes pre-cut thermal pad

Cons

• Thermal pad requires manual trimming for CPU
• No fan included for active cooling
• Passive cooling only without added fan

Good fit if

• You need a passive heatsink for a CM4
• You plan to add a 30 mm fan
• You want a 12 mm thick aluminum block

Skip if

• You use a Raspberry Pi CM5
• You want a ready-to-use fan setup
• You need a heatsink for a different board

Verdict: Geekworm 12mm Aluminum Heatsink for CM4 fits users who want a sturdy 12 mm aluminum block for the CM4 and plan to add a 30 mm fan for active cooling.

2 Best budget

Easycargo 20-Piece Copper and Aluminum Heatsink Kit

Best for: Raspberry Pi passive cooling kits

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 Affiliate link

This kit offers twenty heatsinks for Raspberry Pi 5, 4, and 3 boards. You get fifteen aluminum and five copper pads. Each unit has pre-applied thermal adhesive tape. The aluminum pads measure 0.55 inches square and 0.28 inches high. The copper pads share the same footprint. This mix lets you target specific hot spots on your board. It is a practical solution for builders who want variety in their cooling setup.

Pros

• Includes 15 aluminum and 5 copper heatsinks
• Pre-applied thermal conductive adhesive tape
• Compatible with Raspberry Pi 5, 4, and 3
• Copper pads offer higher thermal conductivity

Cons

• Adhesive tape may leave residue over time
• Small surface area limits heat dissipation
• Not suitable for high-TDP processors

Good fit if

• You need cooling for Raspberry Pi 3, 4, or 5
• You want to mix aluminum and copper materials
• You prefer easy adhesive installation

Skip if

• You require active fan cooling
• You need heatsinks for standard desktop CPUs
• You want to reuse the adhesive later

Verdict: Easycargo 20pcs Pi Heatsink Kit provides a flexible cooling option for Raspberry Pi boards through its mixed aluminum and copper pad selection. It is ideal for users who need simple, adhesive-based cooling for multiple board revisions.

3 Also great

Geekworm Aluminum Passive Raspberry Pi 5 Heatsink

Best for: silent Raspberry Pi 5 builds with height allowance

Material

Aluminum alloy

Cooling Method

Passive

Compatible Device

Raspberry Pi 5

Dimensions

63.5 x 42 x 15 mm

Mounting Type

Nylon screws

Weight

1.55 ounces

View on Amazon: Geekworm Aluminum Passive Raspberry Pi 5 Heatsink Affiliate link

This passive heatsink uses wave-shaped aluminum fins to dissipate heat without noise. It measures 63.5 by 42 by 15 mm and weighs 44 grams. The design keeps all Raspberry Pi 5 ports accessible, including GPIO, HDMI, and USB. It mounts with nylon screws and includes a thermal pad. You get silent operation without fan maintenance. This fits users who need quiet cooling for their Pi 5.

Pros

• Wave-shaped fins increase surface area for heat dissipation
• 15 mm thickness provides substantial aluminum mass
• Maintains full access to all Raspberry Pi 5 ports
• Noiseless fanless operation ensures zero acoustic output

Cons

• 15 mm thickness exceeds the 12 mm profile of the Geekworm C235
• Includes only one thermal pad in the package
• Not compatible with older Raspberry Pi models or specific cases

Good fit if

• You prioritize silent operation over minimal profile height
• You need full access to all Raspberry Pi 5 ports
• You want a dedicated passive solution for the Pi 5

Skip if

• You require a 12 mm low-profile heatsink
• You are using a Raspberry Pi 4 or older model
• You need compatibility with specific case models like X1000

Verdict: Geekworm H509 15mm Aluminum Passive Cooler offers robust silent cooling for Raspberry Pi 5 users who can accommodate its 15 mm height. It is ideal for builds where port accessibility and noise-free performance matter more than a slim profile.

4 Also great

Prolimatech Nano Aluminum Thermal Compound 1.5g

Best for: Quick, safe thermal interface application

Material

Aluminum

Dimensions

6.3 × 2.76 × 2.56 inches

View on Amazon: Prolimatech Nano Aluminum Thermal Compound 1.5g Affiliate link

This thermal compound is designed for efficient heat transfer between a CPU and its cooler. It offers a thermal conductivity of 10.2 W/m°C. The formula is non-corrosive and electrically non-conductive. You get a 1.5g syringe with an applicator for precise application. It allows for thin, even layers to maximize performance without a baking time.

Pros

• High thermal conductivity of 10.2 W/m°C
• Non-corrosive and electrically non-conductive
• Includes 1.5g syringe with applicator
• No baking time required

Cons

• Small 1.5g capacity limits long-term use
• Single compound type lacks variety
• No detailed viscosity or spreadability data

Good fit if

• You need a non-conductive thermal interface
• You want easy application with included tool
• You prefer no curing wait time

Skip if

• You require a large bulk quantity
• You need a high-viscosity paste for vertical mounting
• You want a multi-component mixing system

Verdict: Prolimatech PK-2 Nano Thermal Compound is a practical option for users who prioritize electrical safety and ease of use. It fits builders who want a straightforward application without waiting for the paste to cure.

5 Also great

Uxcell 100mm Aluminum Heatsink 5-Pack

Best for: cooling multiple low-power transistors

Material

Aluminum

Compatible Device

Led Amplifier Transistor IC Module

Dimensions

100x25x10mm

View on Amazon: Uxcell 100mm Aluminum Heatsink 5-Pack Affiliate link

This Uxcell heatsink uses aluminum fins to move heat away from components. The dimensions are 4 by 1 by 0.4 inches. It features eight fins to maximize surface area for cooling. You get five pieces in the package. It fits transistors, ICs, and power amplifiers. This option works well if you need multiple small coolers for a project.

Pros

• Aluminum material for efficient heat transfer
• Eight fins increase surface area
• Includes five heatsinks per package
• Compact 4x1x0.4 inch size

Cons

• Passive design requires airflow
• Fixed 10mm height limits compatibility
• No thermal paste included

Good fit if

• You need to cool multiple small components
• You have space for a 4-inch fin array
• You are building a power amplifier or LED setup

Skip if

• You need active cooling with a fan
• You require a heatsink taller than 10mm
• You are cooling a high-TDP CPU

Verdict: Uxcell 4x1x0.4in Aluminum Heatsink (5-Pack) provides a bulk solution for low-power electronics like transistors and ICs. It suits builders who need several identical coolers for a custom amplifier or LED driver.

6 Best premium

Dynatron K6 80mm 1U Server Fan

Best for: 1U server chassis with LGA115x sockets

Socket Compatibility

LGA1151, LGA1155, LGA1156

Material

Aluminum 6061 Skived Fins

Server Height

1U

Cooling Method

Active PWM Blower

Fan Size

80 x 80 x 15 mm

Dimensions

3.15 x 3.15 x 0.59 inches

View on Amazon: Dynatron K6 80mm 1U Server Fan Affiliate link

The Dynatron K6 is a 1U low-profile CPU cooler designed for server environments. It uses an 80x80x15 mm PWM blower fan with aluminum 6061 skived fins. At 100% duty cycle, it reaches 3000 RPM, moving 9.0 CFM of air. The unit weighs 7.84 ounces and supports LGA1151, LGA1155, and LGA1156 sockets. You need this for tight 1U chassis spaces.

Pros

• 1U server height fits low-profile cases
• 80x80x15 mm PWM fan for speed control
• Aluminum 6061 skived fin construction
• Supports LGA1151, LGA1155, and LGA1156 sockets

Cons

• Small 80 mm fan limits total airflow
• 38.7 dBA noise level at full speed
• Blower design directs air narrowly

Good fit if

• You need a 1U height for a server build
• You require PWM fan speed control
• Your case supports LGA115x socket motherboards

Skip if

• You need standard desktop tower cooling
• You want silent operation under load
• Your case requires a larger 120 mm fan

Verdict: Dynatron K6 80mm 1U Server Cooler fits 1U server builds needing LGA115x support. It offers PWM control in a tight space. You should choose it for compact chassis, not standard desktops.

7

Walfront 24-Fin Aluminum Heatsink

Best for: High-power household and fish LED cooling

Material

Aluminum

Cooling Method

Passive

Compatible Device

LED light, power transistor

Dimensions

150 x 59 x 25 mm

Weight

5.64 ounces

View on Amazon: Walfront 24-Fin Aluminum Heatsink Affiliate link

This Walfront heatsink uses aluminum fins to move heat away from components. It measures 150 by 59 by 25 mm and weighs 5.64 ounces. The design includes 24 fins to maximize surface area for cooling. It suits high-power household LED lights and fish LED devices. You must ensure the size matches your component before use.

Pros

• Aluminum construction for good thermal conductivity
• 24 fins increase surface area for heat transfer
• Large 150 mm length provides ample cooling surface
• Lightweight at 5.64 ounces

Cons

• Limited to specific LED applications, not general CPU cooling
• No thermal paste included in the package
• Passive design requires adequate airflow around the fins

Good fit if

• You need a large aluminum heatsink for high-power LED modules
• You require a 150 mm long cooling solution for fish LED devices
• You want a passive aluminum sink with 24 fins

Skip if

• You are looking for a CPU cooler for a computer processor
• You need a heatsink with included thermal adhesive or paste
• You require a compact unit smaller than 150 mm

Verdict: Walfront 150mm Aluminum Heat Sink is a dedicated passive cooler for high-power LED and fish LED devices. It fits users who need a large aluminum sink with 24 fins for specific lighting hardware, not for general computer CPU cooling.

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