RTX 40 uses a large number of low-cost and inferior silicone grease, and the heat dissipation difference temperature directly exceeds 100

RTX 40 series graphics card heat dissipation paste is controversial for poor quality

Recently, Igor's Lab found that many brands of RTX 40 series graphics cards use low-cost and inferior heat dissipation silicone grease, which has attracted widespread attention.

Although some users reported that the graphics card temperature was too high, and the hotspot temperature even exceeded 100 ° C, the problem often did not appear until several months after use. After disassembly and testing by Igor's Lab, it was found that the culprit was the heat dissipation cream.

The new Manli GeForce RTX 4080 16GB Gallardo and Asus RTX 4080 TUF Gaming graphics cards are both experiencing this issue. Analysis shows that the performance of the thermal paste decreases sharply over time, causing hotspot temperatures to exceed 100 ° C.

At first, the heat dissipation paste performed well, but its stability was extremely poor. Tests showed that its thermal conductivity decreased with increasing thickness, and there was a droplet phenomenon, which is not common in other heat dissipation pastes.

Igor's Lab believes that RTX 40 series graphics cards commonly use inferior silicone grease. The aluminum oxide particles in the silicone grease can temporarily improve the heat dissipation performance, but the oily mixture is easy to lose, resulting in a significant reduction in heat dissipation capacity and even acts as heat insulation.