Best Supermicro Heatsinks: 9 Models Compared
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Finding the right supermicro heatsink requires matching your chassis clearance to your processor socket. Supermicro produces 1U, 2U, and low-profile passive cooling hardware for server platforms using sockets such as LGA 1150, LGA 1155, LGA 2011, and LGA-3647. The Supermicro 1U Processor Heatsink leads the lineup because its four-pound mass provides substantial cooling for 1U server deployments needing heavy cooling mass.
This guide evaluates 9 models based strictly on the specifications published on the product listings. You can compare physical dimensions, weights, and socket layouts to find the exact thermal match for your rackmount build.
Quick picks
Our 9 picks
Supermicro 1U Processor Heatsink
Best for: 1U server deployments needing heavy cooling mass
- Server Height
- 1U
- Dimensions
- 10.4 x 7.2 x 4.6 inches
- Weight
- 4 pounds
This Supermicro 1U server processor heatsink is a dedicated cooling unit engineered for rackmount environments. It matches standard 1U server height requirements and weighs 4 pounds, offering substantial thermal mass for your hardware. Measuring 10.4 inches long, 7.2 inches wide, and 4.6 inches high, this heatsink fits compatible enterprise server chassis. You get a direct-fit component designed for high-density rack configurations that need specified factory physical dimensions.
Pros
- Built for 1U server height chassis
- Provides 4 pounds of cooling mass
- Broad 10.4-inch by 7.2-inch footprint
Cons
- CPU socket compatibility not listed in specifications
- No integrated fan included in specs
Good fit if
- You need a 1U-specified Supermicro heatsink for your server build.
- You require a heavy 4-pound heatsink for heat retention.
Skip if
- You need confirmed socket compatibility for your processor before buying.
- You need an active cooler with a pre-installed fan.
Verdict: Supermicro 1U Server Processor Heatsink provides high physical mass for 1U rackmount deployments. Confirm your exact chassis clearance and CPU socket layout before mounting.
Supermicro 1U Passive Server Heatsink
Best for: 1U LGA1366 Xeon 5500 rack servers
- Socket Compatibility
- LGA1366
- Server Height
- 1U
- Cooling Method
- Passive
- Compatible Device
- 1U DP & 10-Blade Servers
- Dimensions
- 3.6 x 25 x 3.6 inches
- Mounting Type
- Screw & Spring
This Supermicro 1U passive heatsink cools LGA1366 server processors. Designed for 1U dual-processor systems and 10-blade servers, it mounts directly with a screw-and-spring setup. You rely on your server chassis airflow to move air through its passive fins, so no onboard fan requires maintenance. It supports Intel Xeon 5500 series processors. If you maintain LGA1366 rack hardware, this cooler matches your chassis specs.
Pros
- Passive design with zero moving parts
- Secure screw and spring mounting system
- Fits compact 1U dual-processor and 10-blade server enclosures
- Lightweight 0.8-pound build
Cons
- Compatibility limited strictly to LGA1366 sockets
- Requires high chassis airflow due to lack of an integrated fan
- CPU support restricted to Intel Xeon 5500 series
Good fit if
- You run Intel Xeon 5500 series processors in a 1U dual-processor setup.
- You deploy hardware into a 10-blade server chassis with existing system fans.
- You need a secure screw and spring mounting mechanism.
Skip if
- You build with modern sockets such as LGA2011, LGA1150, or AMD G34.
- You need an active heatsink equipped with its own dedicated cooling fan.
Verdict: Supermicro 1U Passive LGA1366 Heatsink delivers standard passive thermal management for Xeon 5500 series chips in high-density 1U enclosures. It installs securely with spring screws and depends entirely on chassis-directed airflow.
Supermicro 1U Passive Server Heatsink
Best for: 1U legacy Intel Xeon LGA 1155 servers
- Socket Compatibility
- LGA1150, LGA1155, LGA1156
- Server Height
- 1U
- Cooling Method
- Passive
- Compatible Device
- X8, X9 1U UP Servers
- Dimensions
- 3.6 x 1.1 x 3.6 inches
- Mounting Type
- Screw Spring, Mounting Bracket
This Supermicro 1U passive heatsink fits compact rackmount systems using LGA 1155, LGA 1150, or LGA 1156 sockets. Built for single-processor X8 and X9 server boards, it stands ready for Intel Xeon X3400, Xeon E3-1200, and Core i3 series processors. Its 0.5-pound passive profile relies entirely on chassis airflow. You get a dedicated cooling option designed specifically for 1U server chassis constraints without taking up extra vertical clearance.
Pros
- Fits 1U server chassis height
- Compatible with LGA 1150, LGA 1155, and LGA 1156 sockets
- Includes BKT-0028L mounting bracket and screw spring hardware
- Supports Intel Xeon X3400, E3-1200, and Core i3 processors
Cons
- Passive cooling requires chassis fan airflow
- No integrated fan included
Good fit if
- You need a passive cooler for a 1U Supermicro X8 or X9 server.
- You run an Intel Xeon X3400, Xeon E3-1200, or Core i3 processor on socket LGA 1155 or 1150.
Skip if
- You require an active heatsink with an integrated fan.
- You use a multi-socket motherboard or newer socket platforms.
Verdict: Supermicro 1U Passive LGA 1155 Server Heatsink delivers standard 1U passive thermal management for compatible X8 and X9 server boards. It provides the right fit if you maintain legacy LGA 1150, 1155, or 1156 Intel setups.
Supermicro 1U Passive Server CPU Heatsink
Best for: 1U blade servers using Socket F
- Socket Compatibility
- Socket G34, Socket F(1207 Pin)
- Server Height
- 1U
- Cooling Method
- Passive
- Compatible Device
- 10-Blade Server
- Dimensions
- 3.94 x 1.02 x 3.54 inches
- Mounting Type
- Screw and Spring
This Supermicro unit is a 1U passive heatsink designed for server enclosures. It features a compact footprint measuring 3.94 inches long, 1.02 inches wide, and 3.54 inches high, weighing 0.9 pounds. The heatsink relies on a screw and spring mounting system for secure attachment. You get targeted cooling for 10-blade server setups accommodating Socket F 1207-pin configurations and compatible Opteron processors without requiring an integrated fan mechanism.
Pros
- Screw and spring mounting method
- Compact 1U server height profile
- Designed for 10-blade server enclosures
- Lightweight 0.9-pound passive design
Cons
- No integrated cooling fan included
- Socket compatibility limited to Socket F 1207-pin
Good fit if
- You need a passive cooler for a 1U server chassis.
- You run a 10-blade server using Socket F hardware.
Skip if
- You need an active heatsink with a dedicated fan.
- You use modern desktop or different server socket platforms.
Verdict: Supermicro 1U Passive Server Heatsink delivers screw-and-spring mounting for 1U multi-blade systems. It provides dedicated passive thermal dissipation across 1207-pin socket layouts.
Supermicro 1U LGA 2011 Heatsink
Best for: 1U Supermicro X9 Narrow ILM servers
- Socket Compatibility
- LGA2011
- Server Height
- 1U
- Compatible Device
- Intel Xeon Processor E5-2600 Series
- Mounting Type
- Screws & Springs for Narrow ILM
- Dimensions
- 4.1 × 1.1 × 3.2 inches
- Weight
- 0.7 kilograms
This Supermicro heatsink provides dedicated cooling for 1U rackmount chassis paired with LGA 2011 sockets. Designed for Intel Xeon Processor E5-2600 series CPUs, it includes screws and springs specifically for Narrow ILM configurations. It measures 4.1 inches long, 1.1 inches wide, and 3.2 inches high while weighing 0.7 kilograms. You will find it suits Supermicro X9 1U UP, DP, MP systems and B9 10-blade servers needing compact hardware.
Pros
- Designed for 1U server height and B9 10-blade servers
- Mounts to LGA 2011 sockets with Narrow ILM screws and springs
- Engineered for Intel Xeon Processor E5-2600 series CPUs
- Compatible with Supermicro X9 UP, DP, and MP systems
Cons
- Restricted to Narrow ILM LGA 2011 sockets
- No integrated cooling fan listed in specifications
Good fit if
- You deploy Intel Xeon E5-2600 series processors in 1U or blade servers.
- You use a Supermicro X9 system requiring Narrow ILM mounting.
Skip if
- You need a heatsink for Square ILM LGA 2011 motherboards.
- You run non-LGA 2011 sockets such as LGA 1150 or AMD G34.
Verdict: Supermicro 1U Narrow ILM LGA 2011 Heatsink offers a tailored cooling solution for dense 1U and blade server environments running Xeon E5-2600 hardware. Its included screws and springs provide direct mounting support for Supermicro X9 Narrow ILM motherboards.
Supermicro 2U Server Heatsink
Best for: Supermicro X9 2U servers using LGA 2011
- Socket Compatibility
- LGA2011 or LGA1356
- Server Height
- 2U+
- Compatible Device
- intel Xeon E5-2600 and E5-2400 Series
- Mounting Type
- Screws & Springs
- System Type
- Server
- Weight
- 10 pounds
This Supermicro cooler is a dedicated server heatsink built for 2U and larger chassis. It supports Intel Xeon E5-2600 and E5-2400 processors across LGA 2011 and LGA 1356 sockets. You get both square and narrow ILM mounting hardware included in the box with screw-and-spring retention. It suits you if you maintain Supermicro X9 series dual-processor or uni-processor systems that require specific rackmount thermal hardware.
Pros
- Supports both square and narrow ILM mounting configurations
- Includes BKT-0048L-RS and BKT-0048L-RN brackets
- Compatible with LGA 2011 and LGA 1356 sockets
- Fits 2U and larger server enclosures
Cons
- Not compatible with slim 1U chassis heights
- Limited to older Intel Xeon E5-2600 and E5-2400 series platforms
- Listed package weight is 10 pounds
Good fit if
- You deploy Supermicro X9 UP or DP servers in 2U or taller chassis.
- You need mounting brackets for either square or narrow ILMs.
- You operate Intel Xeon E5-2600 or E5-2400 series processors.
Skip if
- You need a heatsink designed for a compact 1U server.
- You run newer motherboard platforms such as LGA 3647.
Verdict: Supermicro 2U Dual-ILM Server Heatsink provides direct mounting versatility for Supermicro X9 LGA 2011 and LGA 1356 server motherboards with included square and narrow brackets.
Supermicro 2U Passive LGA3647 Heatsink
Best for: 2U Supermicro X11 Purley LGA-3647 servers
- Socket Compatibility
- Socket P lga-3647
- Server Height
- 2U
- Cooling Method
- Passive
- Compatible Device
- Processor
- Dimensions
- 4.25 x 3.07 x 2.52 inches
- Weight
- 1 pounds
This Supermicro heatsink provides passive cooling for server processors mounted in 2U chassis. It fits Socket P LGA-3647 sockets and aligns with the Supermicro X11 Purley platform. Measuring 2.52 inches tall, 3.07 inches wide, and 4.25 inches long, it relies entirely on chassis airflow rather than an attached fan. You will find it suitable if you maintain enterprise server hardware and need exact form-factor clearance.
Pros
- Fits 2U server chassis form factors
- Supports Socket P LGA-3647 processors
- Designed for Supermicro X11 Purley platform systems
- Compact height of 2.52 inches fits standard 2U enclosures
Cons
- Passive design includes no integrated cooling fan
- Requires forced internal chassis airflow to operate safely
- Restricted strictly to LGA-3647 socket configurations
Good fit if
- You run a 2U rackmount server on the Supermicro X11 Purley platform.
- You need a passive heatsink built for a Socket P LGA-3647 processor.
Skip if
- You use a 1U chassis that requires a lower-profile heatsink.
- You need an active heatsink with a pre-installed fan.
- You operate systems using sockets other than LGA-3647.
Verdict: Supermicro 2U Passive LGA3647 CPU Heatsink delivers direct passive cooling for 2U chassis built on the X11 Purley platform. It fits Socket P LGA-3647 processors within a compact 2.52-inch vertical profile.
Supermicro Low-Profile LGA 1150 Heatsink
Best for: ultra-slim LGA 1150 server enclosures
- Socket Compatibility
- Socket H3 LGA-1150
- Dimensions
- 3.94 × 1.97 × 0.5 inches
- Weight
- 1 pounds
This Supermicro heatsink provides a compact cooling option for your server builds. It features an ultra-low height of 0.5 inches, a length of 3.94 inches, and a width of 1.97 inches, weighing exactly 1 pound. The unit matches Socket H3 LGA 1150 motherboards. It suits you if you maintain older ultra-slim enclosures where vertical clearance is strictly limited and chassis fans provide necessary airflow.
Pros
- Height profile measures 0.5 inches tall
- Direct compatibility with Socket H3 LGA 1150
- Compact footprint of 3.94 inches by 1.97 inches
- Solid metal build weighing 1 pound
Cons
- Compatible solely with LGA 1150 sockets
- Includes no active cooling fan
Good fit if
- You need a heatsink under 0.5 inches tall.
- You build inside a system with an LGA 1150 socket.
Skip if
- You require mounting support for modern processor sockets.
- You need an integrated fan on the heatsink.
Verdict: Supermicro Low-Profile LGA 1150 Heatsink delivers a slim 0.5-inch profile designed strictly for LGA 1150 server hardware.
Supermicro 2U LGA 2011 Server Heatsink
Best for: 2U X9 Intel Xeon E5-2600 server builds
- Socket Compatibility
- LGA2011
- Server Height
- 2U
- Compatible Device
- X9 2U+ UP, DP Servers
- Dimensions
- 3.6 x 2.5 x 3.6 inches
- Mounting Type
- Screws & Springs for Square ILM
- Weight
- 8.01 ounces
This is a 2U server heatsink designed by Supermicro for LGA 2011 sockets. It measures 3.6 inches long, 2.5 inches wide, and 3.6 inches high, weighing approximately 0.5 pounds. Built for X9 generation 2U and larger UP and DP server chassis, it accommodates Intel Xeon E5-2600 series processors. If you run a compatible 2U server build using a Square ILM socket mount, this unit provides the direct hardware fit you need.
Pros
- Fits 2U and larger server chassis
- Supports LGA 2011 socket and Intel Xeon E5-2600 series processors
- Includes screws and springs for Square ILM mounting
- Compact 3.6-inch by 2.5-inch footprint
Cons
- Limited to LGA 2011 socket platforms
- Requires Square ILM mounting holes
- Too tall for 1U server chassis
Good fit if
- You manage a 2U or larger Supermicro X9 UP or DP chassis.
- You deploy an Intel Xeon E5-2600 processor on a Square ILM socket.
Skip if
- You deploy hardware in a 1U rackmount chassis.
- You use motherboards with Narrow ILM mounting configurations.
Verdict: Supermicro 2U LGA 2011 Server Heatsink provides direct-fit thermal hardware for Intel Xeon E5-2600 CPUs in 2U and larger systems. Its integrated springs and screws ensure a secure hold on standard Square ILM motherboards.
Specifications side by side
| Spec | Supermicro 1U Processor Heatsink | Supermicro 1U Passive Server Heatsink | Supermicro 1U Passive Server Heatsink | Supermicro 1U Passive Server CPU Heatsink | Supermicro 1U LGA 2011 Heatsink | Supermicro 2U Server Heatsink | Supermicro 2U Passive LGA3647 Heatsink | Supermicro Low-Profile LGA 1150 Heatsink | Supermicro 2U LGA 2011 Server Heatsink |
|---|---|---|---|---|---|---|---|---|---|
| Socket Compatibility | not specified | LGA1366 | LGA1150, LGA1155, LGA1156 | Socket G34, Socket F(1207 Pin) | LGA2011 | LGA2011 or LGA1356 | Socket P lga-3647 | Socket H3 LGA-1150 | LGA2011 |
| Server Height | 1U | 1U | 1U | 1U | 1U | 2U+ | 2U | not specified | 2U |
| Cooling Method | not specified | Passive | Passive | Passive | not specified | not specified | Passive | not specified | not specified |
| Compatible Device | not specified | 1U DP & 10-Blade Servers | X8, X9 1U UP Servers | 10-Blade Server | Intel Xeon Processor E5-2600 Series | intel Xeon E5-2600 and E5-2400 Series | Processor | not specified | X9 2U+ UP, DP Servers |
| Dimensions | 10.4 x 7.2 x 4.6 inches | 3.6 x 25 x 3.6 inches | 3.6 x 1.1 x 3.6 inches | 3.94 x 1.02 x 3.54 inches | not specified | not specified | 4.25 x 3.07 x 2.52 inches | not specified | 3.6 x 2.5 x 3.6 inches |
| Mounting Type | not specified | Screw & Spring | Screw Spring, Mounting Bracket | Screw and Spring | Screws & Springs for Narrow ILM | Screws & Springs | not specified | not specified | Screws & Springs for Square ILM |
| System Type | not specified | not specified | not specified | not specified | not specified | Server | not specified | not specified | not specified |
| Weight | 4 pounds | 12.8 ounces | 8 ounces | 14.4 ounces | 0.7 kilograms | 10 pounds | 1 pounds | 1 pounds | 8.01 ounces |
| Model | SNK-0032 | SNK-P0037P | SNK-P0046P | SNK-P0042P | SNK-P0047PS | NA | SNK-P0068PS | SNK-P0049P | SNK-P0048P |
The Supermicro Heatsink Lineup
Supermicro heatsinks divide primarily by chassis form factor and socket compatibility. For slim 1U enclosures, you need compact hardware built for directed chassis airflow. Options like the Supermicro 1U Processor Heatsink deliver substantial mass, while the Supermicro 1U LGA 2011 Heatsink targets dense narrow-ILM server motherboards. These models suit you if you maintain high-density rackmount nodes.
For larger chassis, 2U designs accommodate higher thermal demands. The Supermicro 2U Server Heatsink supports LGA 2011 builds, while the Supermicro 2U Passive LGA3647 Heatsink provides dedicated passive cooling for Socket P hardware. Choose these units if you have 2U vertical clearance and need direct server heatsink mounting.
Who Supermicro Heatsinks Suit Best
Supermicro heatsinks suit you if you maintain dedicated 1U or 2U rackmount server hardware.
The physical spread spans from ultra-slim blocks measuring 0.5 inches in height up to units reaching 4.6 inches tall. Hardware weights range from 0.5 pounds up to 10 pounds. All designs use compact, rectangular footprints built strictly for server enclosures.
Key gaps exist across this lineup. None of these models feature integrated cooling fans, RGB lighting, or desktop hardware brackets. The selection also lacks coverage for consumer processor sockets or chassis enclosures larger than 2U.
How to Choose a Supermicro Heatsink
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Match Your CPU Socket
Verify your processor socket type before selecting a model. Supermicro designs heatsinks for distinct processor platforms, including Socket F 1207-pin layouts, legacy LGA 1150 and LGA 1155 sockets, LGA 2011, and Socket P LGA-3647. Socket footprints do not interchange across different CPU generations. For instance, the Supermicro 2U Passive LGA3647 Heatsink mounts specifically to Socket P processors on X11 Purley platforms. Check your motherboard specification sheet to confirm the exact socket designation so the retention pins and base plate align with your processor package.
-
Verify Socket ILM Design
Enterprise motherboards often use different Independent Loading Mechanism (ILM) formats on the same socket type. Platforms using LGA 2011 come in Narrow ILM or Square ILM variants. These variants feature completely different mounting hole spacings. The Supermicro 1U LGA 2011 Heatsink provides hardware tailored specifically for Supermicro X9 Narrow ILM motherboards. If you install a Narrow ILM heatsink on a Square ILM board, the mounting screw holes will not align. Inspect your motherboard manual or measure mounting hole spacing to verify whether your board requires square or narrow retention hardware.
-
Check Server Rack Height
Rack unit sizing determines the maximum vertical space available for components. Supermicro designates heatsinks for either 1U or 2U enclosures. A 1U chassis has a restricted vertical clearance that cannot fit taller hardware designed for larger rack tiers. The Supermicro 2U Server Heatsink fits 2U server motherboards, taking advantage of the additional vertical room inside double-height cases. Selecting hardware designed for a 2U chassis ensures it clears the top chassis cover without blocking internal airflow baffles. Always select a heatsink that matches your chassis rack height rating.
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Measure Vertical Clearance
Dense blade nodes and compact appliances may provide even less vertical headroom than standard rack enclosures. In these confined spaces, check the precise physical height spec rather than relying solely on standard rack ratings. The Supermicro Low-Profile LGA 1150 Heatsink features an ultra-slim height of 0.5 inches, making it suitable for ultra-slim server enclosures. Compare the vertical height spec of the heatsink against the exact distance between your motherboard CPU socket surface and the chassis top cover to prevent contact with the chassis lid.
-
Plan for Passive Airflow
Most Supermicro rack heatsinks rely on passive cooling methods. These blocks do not feature onboard cooling fans. Instead, they depend entirely on high-velocity airflow generated by internal chassis fan walls and guided by air shrouds. The Supermicro 1U Passive Server Heatsink relies directly on chassis-directed airflow to dissipate heat from Xeon 5500 processors. If you deploy passive hardware in a standard desktop case or an enclosure lacking high-CFM system fans, heat will pool on the fins. Confirm your server chassis includes high-pressure fans directed across the CPU socket zone.
-
Inspect Mounting Hardware
Server heatsinks require proper mounting pressure to ensure thermal transfer without damaging fragile socket pins. Supermicro server heatsinks typically feature integrated spring screws or screw-and-spring mechanisms. The Supermicro 1U Passive Server CPU Heatsink uses screw-and-spring mounting to secure the block across 1207-pin sockets. Integrated springs maintain consistent tension across the processor heat spreader despite thermal expansion and chassis vibration. Verify that your motherboard provides compatible threaded backplates or mounting holes to accept the integrated spring screws before installation.
Frequently asked questions
Do Supermicro passive server heatsinks include cooling fans?
Supermicro passive heatsinks do not include built-in fans. They rely strictly on directed system chassis fans to move air across their metal cooling fins. For instance, models such as the SNK-P0037P and SNK-P0046P operate entirely passively within 1U server chassis, requiring proper internal chassis ducting to maintain stable operating temperatures under server workloads.
What is the difference between Square ILM and Narrow ILM Supermicro heatsinks?
Square ILM and Narrow ILM refer to distinct socket mounting hole patterns on server motherboards. A Square ILM cooler will not align with a Narrow ILM socket. For example, the Supermicro SNK-P0047PS is engineered specifically for X9 Narrow ILM boards, whereas the SNK-P0048P mounts to standard Square ILM layouts using integrated screws and springs.
Can you mount a 2U Supermicro heatsink inside a 1U chassis?
You cannot fit a 2U Supermicro heatsink inside a 1U rackmount chassis. 2U heatsinks stand taller than the standard 1.75-inch height limit of a 1U enclosure. For example, the 2U SNK-P0068PS has a vertical height of roughly 2.52 inches, meaning the top chassis panel will not close if you attempt to install it in a 1U system.
Which Supermicro heatsink works with Socket P LGA-3647 processors?
The Supermicro SNK-P0068PS supports Socket P LGA-3647 processors. This passive 2U model is tailored for Supermicro X11 Purley platform motherboards. It measures 2.52 inches in height, 3.07 inches in width, and 4.25 inches in length, delivering dedicated heat dissipation for high-density enterprise servers that utilize high-airflow 2U rack enclosures.
How does the Supermicro Low-Profile LGA 1150 heatsink fit tight enclosures?
The Supermicro SNK-P0049P features an ultra-slim vertical height of 0.5 inches to fit restricted spaces. Designed specifically for LGA 1150 hardware, it measures 1.97 inches wide and 3.94 inches long while weighing 1 pound. This compact footprint allows you to install server hardware inside specialized slim or custom low-profile server enclosures without clearance conflicts.
How do Supermicro 1U heatsinks secure to the server motherboard?
Most Supermicro 1U heatsinks secure directly to the motherboard using integrated spring screws. Models like the SNK-P0037P, SNK-P0042P, and SNK-P0047PS utilize screw-and-spring mounting mechanisms. These spring-loaded fasteners maintain consistent mounting pressure across the processor integrated heat spreader, preventing movement and ensuring solid contact with the thermal interface under standard rack vibration.
Can you use a Supermicro LGA 2011 heatsink on an LGA 1356 motherboard?
Certain Supermicro models accommodate both layouts if they supply compatible hardware. For example, the Supermicro 2U Server Heatsink includes both square and narrow mounting brackets, giving you direct mounting support for both LGA 2011 and LGA 1356 sockets on Supermicro X9 server motherboards. Always confirm bracket support before attempting installation on dual-socket systems.