What is the role of the heatsink？

Heat sink, as the name suggests, is used to reduce the temperature of the CPU hardware, it is used to conduct, release heat, good heat dissipation can ensure CPU performance, to prevent CPU frequency drop due to high temperature.

1.Prevent overheating

When the processor, CPU, GPU and other high-power components are running, a lot of heat will be generated, and these heat need to be discharged. When the temperature rises, the heat is not discharged in time, which will affect the performance and life of the device.

2.Keep the equipment running properly

The heat sink can ensure the normal operation of the device. When the CPU and GPU reach the critical temperature, the heat sink can reduce the working frequency and reduce the performance to prevent the device temperature from rising. It guarantees equipment performance.

3.Extend the life of the equipment

When the equipment is in operation, if it has been at high temperature, the equipment will burn out, at this time, the heatsink is needed to reduce the temperature.

What are the specifications of the heatsink?

Heatsinks can be divided into many kinds according to the form of heat dissipation, the most common are air cooled heatsinks, water cooled heatsinks.

1U active cooling and 1U passive cooling

The following is a 1U active heatsink, support INTEL 3647 (rectangular motherboard) pin slot use, support a maximum of 205W heat dissipation CPU, so the 1U active heatsink in line with the market most of the second generation of intelligent Intel ® Xeon ® scalable processor use, the active heatsink is composed of heat sink, turbofan, In the face of more than 1U machines and the internal heat dissipation of the chassis is not good, it also has excellent performance.

The following is a 1U passive heatsink, supporting the use of INTEL 3647 (rectangular motherboard) pin slot, the maximum support of 165W heat dissipation CPU, the biggest difference between this 1U passive heatsink and 1U active heatsink is that there is no turbofan, you need to completely use the heat dissipation system in the chassis to take away the heat dissipation on the heatsink. Therefore, this heatsink is suitable for CPU use with low core.

2U active and 2U passive cooling

The following is a 2U active heatsink. We found that it is composed of a fan, heat sink and copper tube. The heat dissipation principle is to absorb air from the front fan, and then take away the heat inside the heat sink, and then use the chassis cooling system to exhaust heat. This heatsink is suitable for use in 2U or above chassis.

The following is 2U passive heatsink, which is the same as the 1U active and passive heatsink above, it is less than a turbine fan with the active heatsink, and it is completely cooled by the internal cooling system of the chassis, but this 2U passive heatsink, no matter the size, heat sink area and so on, is much better than 1U passive heat dissipation. Therefore, in the face of a better heat dissipation system, the CPU core can also be competent, and the heat dissipation power reaches 205W, which is in line with most of the second-generation intelligent Intel ® Xeon ® scalable processors on the market, and this heatsink is suitable for use in more than 2U chassis

4U Active cooling

The following is a 4U active heatsink, first of all, we look at the composition, and then found that it is composed of two fans, heat sinks, copper tubes, etc. One of the two fans is to suck air into the heat sink, one is to pull out the heat inside the heat sink, this heatsink, heat dissipation can reach 300W, Almost meets the needs of the second generation of intelligent Intel ® Xeon ® scalable processors on the market.

How to buy a heatsink?

Before choosing a CPU heat sink, you first need to know the CPU model, number of cores, and TDP. TDP is the amount of heat consumed by the CPU, usually expressed in watts (W). If the CPU has a high TDP, you need to select a heat sink to ensure stable CPU operation.

Select heatsink material (aluminum alloy, copper, copper-aluminum composite heatsink)

1. Aluminum heatsink

Advantages: Good thermal conductivity, light weight, low cost, good heat dissipation effect.

Disadvantages: Easy to corrode, not resistant to high temperature.

2. Copper heatsink

Advantages: Excellent thermal conductivity, high temperature resistance, strong corrosion resistance.

Disadvantages: Higher cost, heavier weight.

3. Copper-aluminum composite heatsink

Advantages: Combining the advantages of copper and aluminum, good thermal conductivity, high temperature resistance, strong corrosion resistance.

Disadvantages: Higher cost.

Look at the chassis height

The height of a server chassis affects the number of available heat sinks. For example, a 1U chassis requires only 1U heat sinks. A 2U or higher heat sink cannot be installed because the height of a 2U or higher heat sink exceeds the height of the chassis. However, a 2U server chassis can be equipped with a 1U heat sink, as long as the 1U heat sink meets the heat dissipation requirements of the CPU

Look at the stitch

The number of pins will correspond to the specifications of the heatsink, and the heatsink is in line with what CPU is used to design the size. These pins transmit data and power to the CPU. Different CPU architectures and models will have different numbers and arrangements of pins. Let's take a look at the Lori heatsink, LGA3647-1U-B11, the 3647 named here, and the number of slots supported by the second generation of intel's official website is the same, all 3647.

For more information on server heatsinks and other server accessories, please contact us.