6 Best Alternatives to the Lenovo 02CW373 Genuine OEM Heatsink (2026)

How each alternative compares

Dynatron 1U Passive Vapor Chamber Heatsink

This Dynatron heatsink targets LGA2011 sockets in narrow 1U server chassis, unlike the Lenovo unit designed for M.2 SSDs. It uses a vapor chamber to move heat efficiently within a 4.5-inch height limit. You gain high thermal capacity for dense server builds but lose M.2 compatibility. It weighs 7.94 ounces and measures 5.2 inches long. Choose this if you need passive cooling for a specific server CPU socket. It does not fit desktop PCs or M.2 drives. The vapor chamber technology offers superior heat spreading compared to standard aluminum fins. It is a specialized solution for narrow ILM LGA2011 environments where space is tight.

Dynatron B12 2U Passive Aluminum Cooler

The Dynatron B12 serves 2U Intel server builds with passive cooling. It differs from the Lenovo M.2 heatsink by targeting CPU sockets rather than storage drives. The aluminum construction weighs 1.3 pounds and stands 3.54 inches tall. It fits within a 2U height constraint, making it suitable for rack-mounted systems. You get RoHS compliance and low profile, which the Lenovo part does not address. This cooler is not for M.2 SSDs. It prioritizes low height over active fan performance. If you are building a 2U Intel server and need silent operation, this is a solid choice. It provides reliable passive dissipation for server-grade processors in compact chassis.

SilverStone 1U Passive Copper Server Heatsink

This SilverStone heatsink is built for 1U servers using Intel LGA2011 or LGA2066 sockets. It uses copper material for better thermal conductivity than the Lenovo M.2 passive solution. The profile is only 1.02 inches high, fitting into very dense chassis. It weighs 1.08 pounds and measures 3.54 inches on each side. You gain a specialized low-profile CPU cooler but lose M.2 drive compatibility. It is designed for engineers needing passive cooling in server environments. The copper base helps dissipate heat quickly in confined spaces. It does not support M.2 SSDs or desktop PC sockets. Pick this if you require a copper-based passive solution for 1U Intel server builds.

MITXPC Threadripper EPYC Passive 2U Heatsink

The MITXPC heatsink supports AMD Threadripper and EPYC processors in 2U chassis. It differs from the Lenovo M.2 cooler by targeting high-end CPU sockets. The unit measures 4.45 inches long and 2.52 inches high. It is designed for systems with strong case airflow and processors under 180W TDP. You get passive cooling for powerful CPUs but no M.2 drive support. It is not suitable for standard desktop PCs. The SP3 socket compatibility makes it ideal for Threadripper builds. Choose this if you need a 2U passive solution for AMD server or workstation CPUs. It provides silent operation for high-performance processors in compact server frames.

JEYI M.2 2280 Copper Fin SSD Cooler

This JEYI cooler is designed for M.2 2280 SSDs, similar to the Lenovo part. It uses copper material for passive cooling. The dimensions are 2.83 inches long, 0.94 inches wide, and 0.47 inches high. It weighs 1.76 ounces, making it lighter than the Lenovo unit. You gain a copper-based thermal solution for silent M.2 drive management. It fits users who prioritize silence and have space for a 0.47-inch tall cooler. Unlike the Lenovo OEM part, this is a third-party copper option. It is not for CPU sockets. Choose this if you want a copper heatsink for your M.2 SSD in a compact build.

Dynatron 1U AM4 Copper Passive Heatsink

The Dynatron AM4 heatsink targets 1U AMD Ryzen server chassis. It uses copper fins for passive cooling, differing from the Lenovo M.2 solution. The unit is 5 inches long, 3 inches wide, and 1 inch high. It requires external airflow for effective operation. You gain a specialized passive cooler for AMD AM4 sockets but lose M.2 drive compatibility. It is not for desktop PCs. This heatsink suits users who can provide airflow in 1U server builds. The copper material aids in heat dissipation. It is a niche product for AMD Ryzen servers. Choose this if you need a 1U passive CPU cooler for AMD systems with good airflow.

Quick picks

Our 7 picks

1 Best overall

Lenovo Genuine OEM M.2 Passive Heatsink

Best for: Silent M.2 SSD thermal management

Compatible Device

M.2 SSD

Cooling Method

Passive

View on Amazon: Lenovo Genuine OEM M.2 Passive Heatsink Affiliate link

This is a passive heatsink designed for M.2 SSDs. It uses copper fins to dissipate heat without fans. The build relies on durable materials for long-term use. It serves as a genuine OEM replacement part. You should choose this if you need a quiet, low-profile cooling solution for your storage drive. It fits well in compact builds where fan noise is a concern.

Pros

• Passive cooling method eliminates fan noise
• Constructed from durable copper materials
• Genuine OEM replacement part
• Compatible with M.2 SSD form factors

Cons

• No active fan for high-load thermal management
• Limited to M.2 SSD cooling only
• No included mounting hardware details

Good fit if

• You need silent operation for your storage drive
• You are replacing a damaged OEM heatsink
• You have limited space for active fans

Skip if

• You require active fan cooling for high-performance drives
• You are cooling a CPU or GPU
• You need a universal mounting kit for various drives

Verdict: Lenovo M.2 SSD Passive Heatsink is a quiet, passive cooling solution for M.2 SSDs. It fits users who prioritize silence and OEM quality over maximum thermal performance.

2 Best vapor chamber

Dynatron 1U Passive Vapor Chamber Heatsink

Best for: Narrow ILM LGA2011 1U server builds

Socket Compatibility

Narrow ILM Socket LGA2011

Material

Copper, Aluminum

Server Height

1U

Cooling Method

Passive

Dimensions

5.2 x 2.4 x 4.5 inches

Mounting Type

Captive screw

View on Amazon: Dynatron 1U Passive Vapor Chamber Heatsink Affiliate link

This is a passive 1U heatsink designed for narrow ILM LGA2011 sockets. It uses a copper vapor chamber and aluminum fins to handle up to 165W TDP. The unit measures 5.2 by 2.4 by 4.5 inches and weighs 7.94 ounces. It comes with Shin-Etsu 7762 thermal grease pre-applied. You need a server chassis with active airflow to use this cooler effectively.

Pros

• Copper vapor chamber for efficient heat transfer
• Supports 165W TDP dissipation
• Pre-printed Shin-Etsu 7762 thermal grease
• Captive screw mounting for secure installation

Cons

• Passive design requires external server fans
• Limited to narrow ILM LGA2011 socket only
• 1U height restricts use to specific server racks

Good fit if

• You are building a narrow ILM LGA2011 server
• You need a 1U form factor heatsink
• You have a chassis with forced airflow

Skip if

• You use a standard desktop motherboard
• You need active cooling without case fans
• You require compatibility with AM4 or TR4 sockets

Verdict: Dynatron R31 LGA 2011 1U Vapor Chamber fits narrow ILM LGA2011 server builds needing high TDP support in a 1U profile. It is not suitable for standard desktop PCs or other socket types.

3 Also great

Dynatron B12 2U Passive Aluminum Cooler

Best for: 2U Intel server passive cooling needs

Server Height

2U

Cooling Method

Passive

Dimensions

2.52 x 3.54 x 3.54 inches

Weight

1.3 pounds

View on Amazon: Dynatron B12 2U Passive Aluminum Cooler Affiliate link

The Dynatron B12 is a 2U passive CPU cooler designed for Intel processors in server environments. It features a 90 x 90 x 64 mm aluminum heatsink with a copper base and embedded heatpipes. This unit weighs 1.3 pounds and measures 2.52 x 3.54 x 3.54 inches. It suits you if you need a RoHS compliant solution for a 2U server chassis without active fans.

Pros

• 2U height fits standard server racks
• Aluminum heatsink with copper base
• Embedded heatpipes for heat transfer
• RoHS compliant construction

Cons

• Passive design requires strong case airflow
• Limited to Intel CPU support
• No active fan included for cooling

Good fit if

• You are building a 2U server system
• You need a passive cooling solution for Intel CPUs
• You require RoHS compliant components

Skip if

• You need active fan cooling
• You are using an AMD processor
• You require a 1U form factor

Verdict: Dynatron B12 2U Passive Aluminum Cooler is a solid choice for 2U Intel server builds needing passive cooling. It fits well if you prioritize low height and RoHS compliance over active fan performance.

4 Also great

SilverStone 1U Passive Copper Server Heatsink

Best for: 1U servers with Intel LGA2011/2066

Socket Compatibility

LGA2011/2066

Material

Copper skived-fin and copper base

Server Height

1U

Cooling Method

Passive

System Type

Server

Dimensions

3.54 × 3.54 × 1.02 inches

View on Amazon: SilverStone 1U Passive Copper Server Heatsink Affiliate link

This SilverStone unit is a 1U passive CPU cooler designed for server environments. It stands 26mm tall with a 1.08-pound copper base and skived-fin heatsink. It supports Intel LGA2011 and LGA2066 sockets. The design fits narrow 1U rackmount cases. You need active airflow from case fans to move heat away from the fins. It is a compact solution for dense server builds.

Pros

• Copper skived-fin and copper base construction
• Low 26mm height fits 1U rackmount servers
• Compatible with Intel LGA2011 and LGA2066 sockets
• Weighs 1.08 pounds for stable mounting

Cons

• Passive cooling requires strong case airflow
• Limited to Intel LGA2011/2066 sockets only
• No included mounting hardware or thermal paste

Good fit if

• You are building a 1U rackmount server
• You use an Intel LGA2011 or LGA2066 processor
• You have high-static pressure fans for airflow

Skip if

• You need support for AMD or modern Intel sockets
• You are building a standard desktop PC
• You want a cooler that works without fans

Verdict: SilverStone 1U Passive Copper Cooler is a specialized heatsink for 1U servers using Intel LGA2011 or LGA2066 CPUs. It suits engineers who need a low-profile copper solution in dense chassis.

5 Best premium

MITXPC Threadripper EPYC Passive 2U Heatsink

Best for: AMD Threadripper and EPYC 2U passive cooling

Socket Compatibility

sTRX4, TR4, SP3

Material

Aluminum, Heatpipes

Server Height

2U

Cooling Method

Passive

Dimensions

4.45" x 3.15" x 2.52"

System Type

Server

View on Amazon: MITXPC Threadripper EPYC Passive 2U Heatsink Affiliate link

The MITXPC A34 is a passive server heatsink designed for AMD Threadripper and EPYC systems. It supports SP3, TR4, and sTRX4 sockets with a 2U form factor. The unit handles up to 180 watts of heat dissipation using an aluminum base and stacked fins with heatpipes. It includes pre-applied Shin-Etsu 7762 thermal paste. Its compact dimensions of 4.45 x 3.15 x 2.52 inches fit standard server chassis.

Pros

• Supports SP3, TR4, and sTRX4 sockets
• Handles up to 180W heat dissipation
• Includes pre-applied Shin-Etsu 7762 thermal paste
• 2U server form factor

Cons

• Passive cooling requires strong case airflow
• Limited to 180W thermal design power
• Aluminum base may transfer heat slower than copper

Good fit if

• You use AMD Threadripper or EPYC processors
• You need a 2U passive heatsink for a server
• Your case provides adequate forced airflow

Skip if

• You require active fan cooling
• Your processor exceeds 180W TDP
• You use Intel sockets or AM4

Verdict: The MITXPC A34 2U Passive Heatsink fits AMD Threadripper and EPYC builds needing passive cooling in a 2U chassis. It suits users with strong case airflow and processors under 180W TDP.

6 Best budget

JEYI M.2 2280 Copper Fin SSD Cooler

Best for: Silent M.2 2280 SSD cooling

Material

Copper, aluminum

Cooling Method

Passive

Compatible Device

M.2 2280 NVMe SSD

Dimensions

2.83 x 0.94 x 0.47 inches

Features

Thermal Pad

Weight

1.76 ounces

View on Amazon: JEYI M.2 2280 Copper Fin SSD Cooler Affiliate link

The JEYi Q80 is a passive cooler for M.2 2280 NVMe SSDs. It uses 36 copper fins and a CNC aluminum frame to dissipate heat. The copper fins offer high thermal conductivity. The design includes no fan, so it runs silently. It comes with three thermal pads for better heat transfer. This compact unit fits standard desktop builds if you have the space.

Pros

• 36 copper fins for large surface area
• Passive cooling with no fan noise
• Includes three thermal pads
• CNC aluminum frame for sturdy mounting

Cons

• Passive only, no active fan option
• Limited to M.2 2280 size
• No included thermal paste

Good fit if

• You need silent cooling for an NVMe drive
• You have a standard M.2 2280 slot
• You want a low-profile passive solution

Skip if

• You need active fan cooling
• You use non-standard M.2 sizes
• You have very tight clearance under 0.47 inches

Verdict: JEYI Copper Passive M.2 Heatsink offers quiet, passive cooling for M.2 2280 drives. It suits users who prioritize silence and have adequate space for a 0.47-inch tall cooler.

7 Best am4

Dynatron 1U AM4 Copper Passive Heatsink

Best for: 1U AMD Ryzen server chassis with good airflow

Socket Compatibility

AM4

Material

Copper

Server Height

1U

Cooling Method

Passive

Dimensions

5 x 3 x 1 inches

System Type

Server

View on Amazon: Dynatron 1U AM4 Copper Passive Heatsink Affiliate link

The Dynatron A37 is a passive copper heatsink designed for AMD AM4 sockets. It measures 5 x 3 x 1 inches, fitting the 1U server height constraint. This unit relies on case airflow rather than a fan. You should consider it if you need a low-profile solution for a Ryzen processor in a tight server chassis. It provides cooling without adding moving parts or noise.

Pros

• Constructed from copper for efficient heat transfer
• Compatible with AMD AM4 sockets
• Compact 1U height fits small server cases
• Dimensions of 5 x 3 x 1 inches

Cons

• Passive cooling requires strong case airflow
• No included fan or pump
• Limited to 1U height constraints

Good fit if

• You are building a 1U AMD Ryzen server
• You need a low-profile passive cooler
• You have adequate case airflow for copper fins

Skip if

• You require active fan cooling
• You are using an Intel or AM5 socket
• You need a taller heatsink for better passive dissipation

Verdict: Dynatron A37 Copper Passive AM4 Heatsink is a specialized passive cooler for 1U AMD Ryzen builds. It suits users who can provide external airflow for the copper fins.

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