Awxlumv 100x40x20mm Aluminum Heatsink 2-Pack Review: Who It Fits and Who Should Skip It

What stands out

• Aluminum material for efficient passive heat dissipation
• Dimensions of 100mm x 40mm x 20mm fit standard footprints
• Includes two units for dual-component cooling needs
• Pin board thickness of 1.3mm supports chip mounting

Who it fits

Key specs explained

Material: Aluminium

Aluminum is a lightweight metal with good thermal conductivity. It draws heat away from components like CPUs or routers efficiently. Unlike copper, it is lighter and often more affordable. This makes it suitable for passive cooling where weight matters. You should choose this if you need basic heat dissipation for low-power chips without adding significant mass to your build.

Dimensions: 100mm x 40mm x 20mm

These measurements define the physical footprint and height of the heatsink. The 20mm height is relatively low compared to large CPU air coolers. It fits in tight spaces where tall coolers would not. Check your case clearance before buying. This size is ideal for small electronics, routers, or compact computer builds where space is limited.

Weight: 3.39 ounces

This weight applies to the two-pack of heatsinks. Each unit is light, making them easy to mount without strong adhesives or heavy brackets. The low mass reduces stress on delicate circuit boards. Compare this to heavier copper coolers. This specification is useful for portable devices or setups where adding weight could cause mounting issues.

Compatible Device: CPU, IC Board, Router

This listing indicates the heatsink is designed for various electronic components. It works on CPUs, integrated circuits, and network routers. It is not a dedicated high-end CPU cooler for gaming PCs. Use it for auxiliary cooling or smaller chips. Verify your component size matches the base area. This versatility makes it a good choice for general electronics maintenance.

Aluminum Build and Dimensions

The listing specifies that these heatsinks are constructed from aluminum. This material choice offers a balance of thermal conductivity and low weight. You get two identical units in the package. Each one measures 100mm in length, 40mm in width, and 20mm in height. The listing also provides imperial equivalents, noting the dimensions as approximately 3.94 by 1.57 by 0.8 inches. This compact form factor allows you to mount the unit in tight spaces where larger coolers would not fit.

Regarding the physical structure, the listing details a base board thickness of 4.2mm. The pin boards are listed at 1.3mm thick, with the two outer pin boards measuring 1.8mm. There are eleven cooling fins integrated into the design. These fins increase the surface area available for passive heat dissipation. The layout is simple, with no moving parts or complex geometry to clean.

The total weight for the pair is listed as 3.39 ounces, or 101g per unit. This light weight is a practical advantage for portable devices or routers. You do not need heavy-duty mounting hardware to secure the aluminum block. The finish is standard for extruded aluminum, providing a smooth surface for thermal paste application. This build style suits components like voltage regulators, MOSFETs, and IC boards that generate modest amounts of heat.

Setup and everyday use

Setup is straightforward because these units are passive. You do not need to connect fans or wires. The listing notes a base board thickness of 4.2mm and pin board thickness of 1.3mm. This flat base is designed to sit directly against a heat source. You will likely use thermal paste or adhesive pads to mount it. The package includes two identical heatsinks, so you can cool two components at once. They fit well on chips that generate moderate heat. The data lists compatibility with computer parts, IC boards, routers, and power transistors. This means you can attach one to a router’s main chip or a voltage regulator. The 100mm by 40mm by 20mm size offers enough surface area for small electronics. You must ensure the component fits within the footprint. The aluminum material helps draw heat away from the chip. Since there is no fan, airflow must come from your case or the device’s natural convection. Daily use is silent and requires no maintenance. You do not need to clean dust from moving parts. Just check that the heatsink remains securely attached. It works best in environments with some air movement. If you seal the component in a tight box, cooling may suffer. The lightweight design, at 101g per unit, makes it easy to handle. You can install them in tight spaces where larger coolers would not fit. This simplicity is ideal for hobbyists and basic electronics repair.

Before you buy these heatsinks

These passive aluminum units handle low-power components like routers, IC boards, or small voltage regulators. They do not cool high-end desktop CPUs that require active airflow. You must verify your target component generates enough heat to need this specific size. The base thickness is 4.2mm, so ensure your mounting method provides even pressure across that flat surface. You will need thermal paste to bridge the gap between the heatsink base and the chip. Without it, performance drops significantly. Keep the fins clear of dust, as accumulation reduces efficiency over time. This product fits alongside larger CPU air coolers in our guide, but serves a completely different niche. It is for small electronics, not gaming rigs. Check your available space carefully. The 100mm length may not fit in tight chassis areas. Confirm the 40mm width clears nearby capacitors or RAM sticks. This is a simple, no-fan solution for specific, low-wattage applications.

Check before you buy

• Verify the target component power rating is low enough for passive cooling.
• Confirm the 100mm length fits your available physical space.
• Ensure you have thermal paste for proper heat transfer.
• Check that nearby components do not block the 40mm width.

The product at a glance

1

Awxlumv 100x40x20mm Aluminum Heatsink 2-Pack

Best for: Cooling small low-power components

Material

Aluminium

Compatible Device

Computer, CPU, IC Board, Router, LED

Dimensions

100mm x 40mm x 20mm

Weight

3.39 ounces

View on Amazon: Awxlumv 100x40x20mm Aluminum Heatsink 2-Pack Affiliate link

This is a pair of aluminum heatsinks measuring 100 x 40 x 20 mm. Each unit weighs about 101 grams and features 11 cooling fins. The base thickness is 4.2 mm, while the fins are 1.3 mm thick. You can use these for computer components, CPUs, routers, or power transistors. They provide passive cooling for small electronic devices without needing fans.

Pros

• Includes two heatsinks in one package
• Aluminum construction for efficient heat dissipation
• Compact 100 x 40 x 20 mm size fits tight spaces
• 11-fin design increases surface area

Cons

• Passive cooling only, requires airflow
• No mounting hardware included in specs
• Limited to low-power components

Good fit if

• You need to cool small ICs or routers
• You have space for a 20 mm deep heatsink
• You want a simple passive cooling solution

Skip if

• You need active cooling with a fan
• You are cooling a high-power CPU
• You require pre-installed mounting screws

Verdict: Awxlumv 100x40x20mm Aluminum Heatsink 2-Pack is a basic passive cooling option for low-power electronics like routers or small chips. It fits well in tight spaces where airflow is already present.

Specifications side by side

Frequently asked questions

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