Supermicro 2U Passive LGA3647 Heatsink Alternatives: 6 Similar Picks Compared
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You might be looking for supermicro snk p0068ps 2u passive CPU alternatives because this specific heatsink has strict requirements. The original model fits LGA3647 sockets and measures 4.25 by 3.07 by 2.52 inches. It is designed for silent 2U server builds that rely on chassis airflow. However, you may need a different socket type or a different physical footprint for your specific server chassis. Some users prefer AMD EPYC or Threadripper platforms, which require distinct mounting solutions. Others might need a cooler for older LGA 2011 systems or newer SP5 sockets.
We selected these 6 picks because their published specifications overlap with the original product’s key attributes. Each alternative is also a passive 2U heatsink, ensuring they fit the same height constraints. The list includes options for various processor sockets, including SP3, AM4, AM5, and LGA 2011. This approach allows you to compare dimensions and compatibility details side by side. You can find a replacement that matches your server’s airflow requirements and socket type without guessing. The following sections break down the exact measurements and socket support for each option.
Our top pick: Supermicro 2U Passive LGA3647 Heatsink.
How each alternative compares
Dynatron B12 2U Passive Aluminum Cooler
The Dynatron B12 shares the 2U passive profile but shifts dimensions to 3.54 by 3.54 by 3.54 inches. This cubic shape offers a different footprint than the Supermicro’s rectangular 4.25 by 3.07 by 2.52 inch design. It weighs slightly more at 1.3 pounds versus 1 pound. This option suits Intel builds where space is constrained differently. You get silent operation without fan noise. The trade-off is a less standard shape for some chassis. Pick this if your server rack requires a square base plate rather than the elongated Supermicro layout. It remains a compact, budget-friendly passive solution for general Intel 2U systems.
MITXPC Threadripper EPYC Passive 2U Heatsink
This MITXPC heatsink targets AMD SP3 sockets instead of LGA3647. It measures 4.45 by 3.15 by 2.52 inches, making it slightly longer and wider than the Supermicro unit. The height remains identical at 2.52 inches. You choose this for Threadripper or EPYC platforms needing passive cooling under 180 watts. The Supermicro model cannot fit these AMD sockets. This alternative provides reliable heat dissipation for high-end workstation servers. It sacrifices Intel compatibility for AMD support. If you are building a Threadripper system, this is the necessary passive choice. It maintains the 2U form factor while adapting to a different socket architecture.
Dynatron 2U Passive AMD SP5 Cooler
The Dynatron J7 supports AMD Socket SP5 for Genoa processors. It measures 3.62 by 4.65 by 2.52 inches. This width exceeds the Supermicro’s 3.07 inches significantly. The length is shorter at 3.62 inches. Height stays at 2.52 inches for 2U compatibility. You select this for modern AMD server builds requiring high heat dissipation without active fans. The Supermicro cooler cannot support SP5 sockets. This option delivers specialized cooling for newer architectures. It offers silence and server-grade performance. Pick this if your platform is AMD Genoa. The larger surface area helps manage higher thermal loads typical of these processors.
Dynatron 2U Passive AM4 Heatsink
This Dynatron A43 supports AM4 and AM5 sockets, unlike the LGA3647 Supermicro unit. It features a square 6 by 6 by 6 inch design. This is much larger and taller than the 2.52 inch height of the Supermicro cooler. It weighs 2 pounds. You choose this for AMD desktop or server builds under 120 watts. The Supermicro model is strictly for server sockets. This alternative fits AM4/AM5 platforms. It provides a compact passive solution for consumer-grade AMD CPUs. The trade-off is the significantly different physical dimensions. It does not fit 2U server racks in the same way. Pick this for desktop silence or small form factor AMD builds.
YQQEWI 2U LGA 2011 Passive Server Heatsink
The YQQEWI heatsink is designed for LGA 2011 Narrow sockets, not LGA3647. It serves as a direct passive replacement for Supermicro SNK-P0048PS units. Its dimensions are listed as 0.39 by 0.39 by 0.39 inches in the specs, which likely refers to a specific component size rather than the full heatsink block. It weighs 1.76 ounces. You pick this for older LGA 2011 server builds. It is not suitable for active cooling needs. The Supermicro model supports newer LGA3647 processors. This alternative targets legacy platforms. It offers silent operation for specific older server chassis. Choose this if you are maintaining an older LGA 2011 system.
ZDAVSFR 2U Passive LGA 2011 Heatsink
The ZDAVSFR heatsink also targets LGA 2011 sockets. It fits users replacing SNK-P0048PS units in airflow-rich 2U servers. It is not suitable for desktop builds. The Supermicro model supports LGA3647. This alternative is for older platforms. It provides passive cooling for legacy systems. You choose this for specific server replacements. It does not suit users needing active cooling components. The Supermicro cooler is for newer processors. This option is for maintaining older infrastructure. It offers a silent solution for LGA 2011 sockets. Pick this if your server uses the older socket type. It ensures compatibility with legacy airflow requirements.
Quick picks
Our 7 picks
Supermicro 2U Passive LGA3647 Heatsink
Best for: Silent 2U server builds with LGA3647
- 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
View on Amazon: Supermicro 2U Passive LGA3647 Heatsink Affiliate link
This Supermicro SNK-P0068PS is a passive 2U heatsink designed for LGA3647 processors. It measures 4.25 x 3.07 x 2.52 inches and weighs 1 pound. The unit relies on system airflow rather than a fan. It fits the Supermicro X11 Purley platform. You need adequate case ventilation to keep temperatures stable. This option suits users who prefer silent operation in server environments.
Pros
- Passive cooling eliminates fan noise
- Fits standard 2U server chassis
- Compatible with LGA3647 sockets
- Compact 2.52-inch height
Cons
- Requires strong system airflow
- Limited to specific server platforms
- No fan included for active cooling
Good fit if
- You need silent operation in a 2U server
- You use an LGA3647 processor
- Your case has high airflow fans
Skip if
- You use a consumer desktop case
- You need active cooling without fans
- You have an AM4 or LGA2011 socket
Verdict: Supermicro 2U Passive LGA3647 Heatsink is a specialized component for server builds. It fits users who prioritize silence and have proper airflow in a 2U chassis.
Dynatron B12 2U Passive Aluminum Cooler
Best for: Intel 2U server passive cooling
- 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 passive 2U server heatsink designed for Intel CPUs. It measures 90 by 90 by 64 mm and weighs 1.3 pounds. The unit uses an aluminum heatsink with a copper base and embedded heatpipes. This compact design fits 2U server chassis. It suits users needing a low-profile, fanless cooling solution for Intel processors in constrained spaces.
Pros
- Passive 2U cooling for Intel CPUs
- Aluminum heatsink with copper base
- Compact 90 x 90 x 64 mm size
- Lightweight 1.3 pound build
Cons
- Limited to Intel processor support
- No fan included for active cooling
- Small surface area compared to larger 2U blocks
Good fit if
- You need a fanless solution for Intel CPUs
- You have a 2U server chassis with airflow
- You require a compact 90 mm square footprint
Skip if
- You use AMD Threadripper or EPYC processors
- You require active fan cooling for high TDP
- You need a larger heatsink for better dissipation
Verdict: Dynatron B12 2U Passive CPU Cooler is a compact, lightweight option for Intel-based 2U servers. It fits users who prioritize a small footprint and passive operation over raw cooling capacity.
MITXPC Threadripper EPYC Passive 2U Heatsink
Best for: AMD Threadripper and EPYC 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 Dynatron A34 is a passive 2U heatsink designed for AMD Threadripper and EPYC processors. It supports SP3, TR4, and sTRX4 sockets. The unit dissipates up to 180 watts of heat using aluminum fins and heatpipes. It measures 4.45 by 3.15 by 2.52 inches. Shin-Etsu 7762 thermal paste is pre-applied. This cooler suits servers requiring passive cooling for high-end AMD platforms.
Pros
- Supports AMD Threadripper and EPYC SP3 sockets
- Handles up to 180 watts of heat dissipation
- Pre-applied Shin-Etsu 7762 thermal paste
- Compact 2U dimensions for server chassis
Cons
- Limited to 180 watts thermal capacity
- Passive design requires strong case airflow
- Only fits AMD Threadripper and EPYC platforms
Good fit if
- You build a server with AMD Threadripper or EPYC CPUs
- You need a passive 2U cooler for SP3 sockets
- You want pre-applied thermal paste for easy installation
Skip if
- You use Intel LGA sockets
- You require active fan cooling
- Your CPU exceeds 180 watts TDP
Verdict: Dynatron A34 Passive 2U Heatsink fits AMD Threadripper and EPYC servers needing passive cooling under 180 watts. It offers reliable heat dissipation for SP3 platforms without active fans.
Dynatron 2U Passive AMD SP5 Cooler
Best for: AMD Genoa Socket SP5 server cooling
- Socket Compatibility
- Socket SP5
- Material
- Aluminum Fin + Copper embedded Base
- Server Height
- 2U
- Cooling Method
- Passive
- Dimensions
- 118.0 x 92.4 x 64 mm
View on Amazon: Dynatron 2U Passive AMD SP5 Cooler Affiliate link
The Dynatron J7 is a 2U passive air cooler built for AMD Genoa processors on Socket SP5. It handles up to 320 watts of heat dissipation using an aluminum fin stack with a copper-embedded base and heat pipes. Its dimensions are 118.0 x 92.4 x 64 mm. This design suits server environments requiring quiet operation without active fans.
Pros
- Supports AMD Genoa processors on Socket SP5
- Handles up to 320 Watts of heat dissipation
- Uses aluminum fins with a copper-embedded base
- Passive design ensures zero fan noise
Cons
- Limited to Socket SP5 compatibility
- Requires external server airflow for cooling
- Fixed passive design lacks adjustable fan speeds
Good fit if
- You use AMD Genoa processors on Socket SP5
- You need a 2U passive cooling solution
- You prioritize silent operation in a server
Skip if
- You use Intel sockets like LGA3647
- You need active fan control
- You require compatibility with AMD AM4 or AM5
Verdict: The Dynatron J7 2U Passive Cooler is a specialized solution for AMD Genoa systems on Socket SP5. It fits users who need high heat dissipation without fan noise in a 2U server chassis.
Dynatron 2U Passive AM4 Heatsink
Best for: AMD AM4/AM5 passive 2U cooling
- Socket Compatibility
- Socket AM4 or AM5
- Material
- Aluminum
- Server Height
- 2U
- Cooling Method
- Passive
- Dimensions
- 4.13" x 2.91" x 2.48"
- Weight
- 2 pounds
View on Amazon: Dynatron 2U Passive AM4 Heatsink Affiliate link
The Dynatron A43 is a passive 2U heatsink designed for AMD AM4 and AM5 sockets. It dissipates up to 120 watts using aluminum stacked fins and heatpipes. The unit measures 4.13 by 2.91 by 2.48 inches and includes pre-applied Shin-Etsu 7762 thermal paste. It suits users needing a low-profile, fanless cooling solution for compatible AMD processors in server or compact builds.
Pros
- Passive 2U design requires no fans
- Supports AM4 and AM5 sockets
- Handles up to 120 watts of heat
- Includes pre-applied Shin-Etsu 7762 thermal paste
Cons
- Limited to 120 watts TDP
- Only compatible with AMD sockets
- No fan included for active cooling
Good fit if
- You need a fanless 2U cooler for AMD AM4 or AM5
- You have a case with strong airflow for passive cooling
- You want pre-applied thermal paste for easy installation
Skip if
- You use an Intel CPU
- Your processor exceeds 120 watts TDP
- You require active fan cooling for higher heat loads
Verdict: Dynatron A43 Passive 2U AM5 Heatsink fits AMD builders needing a compact, fanless 2U solution for systems under 120 watts.
YQQEWI 2U LGA 2011 Passive Server Heatsink
Best for: LGA 2011 Narrow passive server builds
- Socket Compatibility
- LGA 2011 Narrow
- Server Height
- 2U
- Cooling Method
- Passive
- Compatible Device
- Server CPU
- Lighting
- RGB
- Color
- Black
View on Amazon: YQQEWI 2U LGA 2011 Passive Server Heatsink Affiliate link
This YQQEWI heatsink is a passive 2U server radiator designed for LGA 2011 Narrow sockets. It features a black finish and weighs 1.76 ounces. The unit is compatible with Supermicro SNK-P0048PS replacements. It suits server builds requiring passive cooling for Xeon processors. The compact design fits standard 2U chassis constraints. You should verify socket compatibility before purchase.
Pros
- Passive cooling method requires no fans
- Compatible with LGA 2011 Narrow sockets
- Fits 2U server chassis dimensions
- Lightweight at 1.76 ounces
Cons
- Passive design relies entirely on case airflow
- Limited to LGA 2011 Narrow socket only
- No active fan support for higher loads
Good fit if
- You need a passive replacement for SNK-P0048PS
- You are building a low-noise 2U server
- You use LGA 2011 Narrow Xeon CPUs
Skip if
- You require active fan cooling
- You use LGA 3647 or AM4 sockets
- You need RGB lighting features
Verdict: YQQEWI 2U LGA2011 Passive Heatsink is a direct passive replacement for Supermicro SNK-P0048PS units. It fits 2U server chassis with LGA 2011 Narrow sockets. It is not suitable for active cooling needs.
ZDAVSFR 2U Passive LGA 2011 Heatsink
Best for: 2U server airflow replacement for LGA 2011
- Socket Compatibility
- LGA 2011 Narrow
- Server Height
- 2U
- Cooling Method
- Passive
- Compatible Device
- Server CPU
- Lighting
- RGB
- Color
- Black
View on Amazon: ZDAVSFR 2U Passive LGA 2011 Heatsink Affiliate link
This ZDAVSFR heatsink is a passive 2U cooler designed for LGA 2011 narrow sockets. It relies on server airflow rather than a built-in fan. The unit is black and includes RGB lighting elements, though the cooling method remains passive. It serves as a replacement for Supermicro SNK-P0048PS units. You need a server chassis with strong airflow to use this effectively for X9DRI-F boards.
Pros
- Passive cooling design for 2U server chassis
- Compatible with LGA 2011 narrow socket
- Includes RGB lighting features
- Black finish for standard server aesthetics
Cons
- No fan included; requires external server airflow
- RGB lighting is unnecessary for passive cooling
- Limited to LGA 2011 narrow socket only
Good fit if
- You are replacing a Supermicro SNK-P0048PS heatsink
- You have a 2U server chassis with strong airflow
- You need a passive solution for LGA 2011 narrow
Skip if
- You need a cooler with an included fan
- You are using a desktop PC case
- You require support for LGA 3647 sockets
Verdict: ZDAVSFR 2U Passive LGA 2011 Heatsink fits users replacing SNK-P0048PS units in airflow-rich 2U servers. It does not suit desktop builds or users needing active cooling components.
Specifications side by side
| Spec | Supermicro 2U Passive LGA3647 Heatsink | Dynatron B12 2U Passive Aluminum Cooler | MITXPC Threadripper EPYC Passive 2U Heatsink | Dynatron 2U Passive AMD SP5 Cooler | Dynatron 2U Passive AM4 Heatsink | YQQEWI 2U LGA 2011 Passive Server Heatsink | ZDAVSFR 2U Passive LGA 2011 Heatsink |
|---|---|---|---|---|---|---|---|
| Socket Compatibility | Socket P lga-3647 | not stated | sTRX4, TR4, SP3 | Socket SP5 | Socket AM4 or AM5 | LGA 2011 Narrow | LGA 2011 Narrow |
| Material | not stated | not stated | Aluminum, Heatpipes | Aluminum Fin + Copper embedded Base | Aluminum | not stated | not stated |
| Server Height | 2U | 2U | 2U | 2U | 2U | 2U | 2U |
| Cooling Method | Passive | Passive | Passive | Passive | Passive | Passive | Passive |
| Compatible Device | Processor | not stated | not stated | not stated | not stated | Server CPU | Server CPU |
| Dimensions | 4.25 x 3.07 x 2.52 inches | 2.52 x 3.54 x 3.54 inches | 4.45" x 3.15" x 2.52" | 118.0 x 92.4 x 64 mm | 4.13" x 2.91" x 2.48" | not stated | not stated |
| Lighting | not stated | not stated | not stated | not stated | not stated | RGB | RGB |
| System Type | not stated | not stated | Server | not stated | not stated | Server | Server |
| Color | not stated | not stated | not stated | not stated | not stated | Black | Black |
| Weight | 1 pounds | 1.3 pounds | not stated | not stated | 2 pounds | 1.76 ounces | not stated |
| Model | SNK-P0068PS | 8541602256 | not stated | not stated | not stated | YQQEWI | not stated |
| Size | not stated | not stated | not stated | not stated | not stated | A-RGB | A-RGB |
Readers of this guide also look at supermicro x14sbm tf motherboard alternatives.
Frequently asked questions
Can I use a standard desktop air cooler in a 2U server case?
No. Standard desktop coolers are too tall for 2U chassis, which have strict height limits. You must use a heatsink rated for 2U server heights. The options listed here are all 2U passive models designed to fit within those narrow clearance constraints.
Does the Dynatron B12 fit LGA3647 sockets like the Supermicro SNK-P0068PS?
The data does not specify socket compatibility for the Dynatron B12. It is described as an Intel 2U server passive cooling option. You should verify pin layout and mounting hole patterns with the manufacturer before assuming it fits LGA3647, as dimensions differ from the Supermicro unit.
Which heatsink is best for AMD Threadripper or EPYC processors?
The MITXPC Threadripper EPYC Passive 2U Heatsink is the best choice for those platforms. It explicitly lists SP3 socket compatibility. This model is designed for AMD Threadripper and EPYC servers needing passive cooling under 180 watts, offering reliable heat dissipation without active fans.
Is there a passive cooler for the new AMD Genoa SP5 socket?
Yes. The Dynatron 2U Passive AMD SP5 Cooler supports Socket SP5. It is a specialized solution for AMD Genoa systems. This heatsink provides high heat dissipation without fan noise, making it suitable for 2U server chassis that require silent operation for modern AMD processors.
Can I use the Dynatron AM4 cooler for an AM5 processor?
Yes. The Dynatron 2U Passive AM4 Heatsink lists AM5 in its socket compatibility. It fits AMD builders needing a compact, fanless 2U solution for systems under 120 watts. The unit measures 6 by 6 by 6 inches and weighs 2 pounds.
Are there passive replacements for the Supermicro SNK-P0048PS heatsink?
Yes. The YQQEWI and ZDAVSFR 2U LGA 2011 Heatsinks are direct passive replacements for SNK-P0048PS units. They fit 2U server chassis with LGA 2011 Narrow sockets. These models are not suitable for active cooling needs or desktop builds, as they rely on chassis airflow.
Do these passive heatsinks include fans for active cooling?
No. All listed alternatives use a passive cooling method. They do not include fans. They rely on chassis airflow to dissipate heat. This design ensures silent operation but requires proper server ventilation to maintain safe operating temperatures for your CPU.