Supermicro 2U Passive LGA3647 Heatsink or Supermicro Low-Profile LGA 1150 Heatsink? Which Supermicro Model to Buy
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This supermicro snk p0068ps 2u passive CPU vs heatsink comparison covers two distinct server cooling solutions from the same brand. Both units are designed specifically for processor thermal management in enterprise environments. They share a similar weight and passive cooling approach, meaning they rely on case airflow rather than integrated fans. The primary difference lies in their physical form factor and socket support. One is a taller 2U unit for modern platforms, while the other is a low-profile option for older systems.
Key differences
| Aspect | Supermicro 2U Passive LGA3647 Heatsink | Supermicro Low-Profile LGA 1150 Heatsink |
|---|---|---|
| Socket Compatibility | LGA3647 | LGA1150 |
| Server Height | 2U | Low-Profile |
| Heatsink Height | 2.52 inches | 0.5 inches |
| Heatsink Width | 3.07 inches | 1.97 inches |
Which one should you choose?
Choose Supermicro 2U Passive LGA3647 Heatsink if
- You are building on a Supermicro X11 Purley platform requiring LGA3647 support
- Your server chassis allows for a 2U height clearance
- You need a wider base for broader heat distribution
Choose Supermicro Low-Profile LGA 1150 Heatsink if
- You are working with an older LGA1150 socket motherboard
- Your chassis has strict height limitations under 0.5 inches
- You require a narrower footprint for dense server layouts
Verdict: Choose the SNK-P0068PS if you need compatibility with newer LGA3647 processors and have the vertical space for a 2U cooler. Select the low-profile LGA1150 heatsink if your system uses older sockets and requires minimal height clearance. Match the socket and physical dimensions to your specific server chassis.
Socket and Form Factor Comparison
Socket Compatibility
The Supermicro 2U Passive LGA3647 Heatsink supports the Socket P LGA-3647 interface. This is a large server socket designed for high-core-count processors. The Supermicro Low-Profile LGA 1150 Heatsink supports Socket H3 LGA-1150. This is a smaller server socket for older or lower-power processors. You must match the heatsink to your motherboard socket. These two products serve entirely different processor families. Choosing the wrong one will prevent installation. The LGA3647 model is for modern Xeon Scalable platforms. The LGA1150 model is for older Xeon E3 or Core i-series server chips.
Physical Height
Height is critical for rack space. The Supermicro 2U Passive LGA3647 Heatsink stands 2.52 inches tall. It is designed for standard 2U server chassis. The Supermicro Low-Profile LGA 1150 Heatsink is only 0.5 inches tall. This low-profile design fits in cramped 1U or tight 2U spaces. If you have a standard 2U rack, the taller heatsink may fit. If you need to fit many servers in a rack, the low-profile unit saves vertical space. Your case clearance determines which height works for your build.
Overall Dimensions
The Supermicro 2U Passive LGA3647 Heatsink measures 4.25 inches in length and 3.07 inches in width. This footprint covers a larger area of the processor. The Supermicro Low-Profile LGA 1150 Heatsink measures 3.94 inches in length and 1.97 inches in width. It has a smaller surface area. The larger heatsink may transfer heat better due to more fins. The smaller heatsink fits in tighter footprints. You need to check your motherboard layout for clearance around the socket. The width difference is significant for nearby components.
Cooling Method
Both units use passive cooling. This means they have no fans. They rely entirely on case airflow. You must have strong fans blowing across the fins. The Supermicro 2U Passive LGA3647 Heatsink is built for this airflow. The Supermicro Low-Profile LGA 1150 Heatsink also requires this airflow. Neither unit works in a sealed case. You need to ensure your server has adequate front-to-back airflow. Passive cooling is silent and reliable. It removes moving parts that can fail. Both options share this practical design trait.
Platform Compatibility
The Supermicro 2U Passive LGA3647 Heatsink is compatible with the Supermicro X11 Purley platform. This specifies the exact server generation it supports. The Supermicro Low-Profile LGA 1150 Heatsink does not list a specific platform. It only lists the LGA 1150 socket. You should verify your motherboard model before buying. The X11 Purley platform is a specific enterprise standard. Using the wrong heatsink can cause compatibility issues. The listed platform info for the first unit gives you more confidence for that specific board.
Choose the right Supermicro heatsink
Users with LGA3647 server platforms
You need a heatsink for the Socket P LGA-3647 interface. This model fits your specific processor socket requirements. It measures 4.25 by 3.07 by 2.52 inches. The 2U server height ensures compatibility with standard rack chassis. Passive cooling relies on system airflow. This unit weighs one pound. It is built for high-core-count enterprise processors.
Users with LGA1150 sockets
You require support for the Socket H3 LGA-1150 interface. This heatsink matches that specific socket type. It features a low-profile design at just 0.5 inches in height. The width is 1.97 inches. The length is 3.94 inches. It also weighs one pound. This compact form factor suits smaller server enclosures or specific low-height airflow configurations.
Users needing low-profile cooling
Space is limited in your chassis. This heatsink stands only 0.5 inches tall. It is significantly shorter than the 2.52-inch alternative. The width is 1.97 inches. The length is 3.94 inches. It supports LGA 1150 sockets. The passive design works with existing case fans. Its small footprint allows installation in tight server environments.
The products compared
Supermicro 2U Passive LGA3647 Heatsink
Best for: 2U server builds with LGA3647 CPUs
- 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 heatsink is designed for 2U server chassis and uses passive cooling. It fits LGA3647 sockets and measures 4.25 by 3.07 by 2.52 inches. The unit weighs 1 pound. You need active case airflow to move heat away from the fins. It suits Supermicro X11 Purley platforms that require a low-profile, non-fan solution.
Pros
- Passive cooling design eliminates fan noise
- Compatible with LGA3647 sockets
- Fits standard 2U server chassis dimensions
- Lightweight at 1 pound
Cons
- Requires external case fans for cooling
- Limited to specific Supermicro X11 Purley platforms
- No integrated fan for direct heat dissipation
Good fit if
- You are building a 2U server chassis
- You use an LGA3647 processor
- You need silent operation without fan noise
Skip if
- You are building a standard desktop PC
- You use an LGA1150 socket
- You need a self-contained cooling solution
Verdict: Supermicro 2U Passive LGA3647 Heatsink fits 2U server builds using LGA3647 processors. It works well when your case provides strong airflow. It does not suit desktop users or LGA1150 systems.
Supermicro Low-Profile LGA 1150 Heatsink
Best for: compact LGA-1150 builds with low clearance
- Socket Compatibility
- Socket H3 LGA-1150
- Dimensions
- 3.94 × 1.97 × 0.5 inches
- Weight
- 1 pounds
View on Amazon: Supermicro Low-Profile LGA 1150 Heatsink Affiliate link
This Supermicro air cooler is designed for Socket H3 LGA-1150 processors. It measures 3.94 inches in length, 1.97 inches in width, and 0.5 inches in height. The unit weighs 1 pound. Its low profile makes it suitable for cases with limited clearance. It is a passive cooling solution intended for systems where space is restricted. You should consider this if your build requires a compact form factor.
Pros
- Compatible with Socket H3 LGA-1150
- Low profile height of 0.5 inches
- Compact dimensions of 3.94 x 1.97 inches
- Lightweight at 1 pound
Cons
- Limited to LGA-1150 socket only
- No fan included for active cooling
- Small surface area compared to standard coolers
Good fit if
- You need a cooler for LGA-1150 CPUs
- You have a small form factor case
- You require a passive cooling solution
Skip if
- You use an LGA-1151 or newer socket
- You need active fan cooling
- You have high thermal output CPUs
Verdict: Supermicro Low-Profile LGA 1150 Heatsink is a specialized solution for LGA-1150 builds with tight space constraints. It fits users who prioritize compact dimensions over raw cooling performance.
Specifications side by side
| Spec | Supermicro 2U Passive LGA3647 Heatsink | Supermicro Low-Profile LGA 1150 Heatsink |
|---|---|---|
| Socket Compatibility | Socket P lga-3647 | Socket H3 LGA-1150 |
| Server Height | 2U | not stated |
| Cooling Method | Passive | not stated |
| Compatible Device | Processor | not stated |
| Dimensions | 4.25 x 3.07 x 2.52 inches | not stated |
| Weight | 1 pounds | 1 pounds |
| Model | SNK-P0068PS | SNK-P0049P |
Frequently asked questions
Can I use the Supermicro SNK-P0068PS on a desktop motherboard?
No, this heatsink is not suitable for standard desktop users. It is designed specifically for 2U server builds using LGA3647 processors. Desktop motherboards typically use different sockets and lack the airflow required for this passive unit. You should only consider this model if you are building a dedicated server chassis that supports the LGA3647 socket.
Does the Supermicro SNK-P0049P fit LGA3647 processors?
No, this low-profile heatsink is only compatible with LGA 1150 sockets. It is a specialized solution for compact builds with tight space constraints. It cannot be mounted on LGA3647 platforms. If you are using a server with the LGA3647 interface, you must choose the SNK-P0068PS model instead.
What are the physical dimensions of the Supermicro SNK-P0068PS?
The Supermicro 2U Passive LGA3647 Heatsink measures 4.25 inches in length, 3.07 inches in width, and 2.52 inches in height. It weighs 1 pound. These dimensions are designed to fit within standard 2U server chassis. You must ensure your case has sufficient clearance for this height and footprint before installation.
How tall is the Supermicro Low-Profile LGA 1150 Heatsink?
The Supermicro Low-Profile LGA 1150 Heatsink stands at 0.5 inches tall. Its compact profile makes it ideal for systems with limited vertical clearance. The unit measures 3.94 inches in length and 1.97 inches in width. This low height allows it to fit in smaller server enclosures where standard coolers would not fit.
Do these Supermicro heatsinks include fans?
No, both models use passive cooling methods. They do not include integrated fans. Instead, they rely on case airflow to dissipate heat. You must ensure your server chassis provides strong and consistent airflow across the heatsink fins. Without adequate airflow, these passive units cannot maintain safe operating temperatures.
Is the SNK-P0068PS heavier than the SNK-P0049P?
No, both heatsinks weigh exactly 1 pound. Despite their different sizes and intended uses, they share the same weight specification. The SNK-P0068PS is larger in volume but does not add extra mass compared to the smaller SNK-P0049P. This equal weight simplifies shipping and handling considerations for both models.