GEFORCE RTX 5090 FE: Fusion connector as a result of lack of charge distribution? 377 comments
Over the past few days, photos of melted 12V-2×6 caps have been circulating on both the power supply and RTX-5090-FE side. Roman Hartung Alias The8auer not only saw the melted components, but also tested the caps and cables themselves when using a 5090 FE. Computer base also measured.
Roman Hartung runs an nvidia geforce rtx 5090 fe in the furmark which has been converted into its own water cooler, which ensures maximum load on the graphics card with a constant TDP of 575 watt. He checked the seat of the cable several times, both on the power supply and on the graphics card and even though the cable had been used several times already, it is not an old worn cable. There are no contact gaps in the video.
2 lines carry almost all the load
It monitors cap temperatures with a thermal imaging camera. After just a few minutes you can see that the power connection in particular heats up enormously. However, it becomes visible in the thermal image that a high load is passing through only two cables on the graphics card. Up to 22 amps are carried through just one of the six 12 volt cables in the 12V-2×6 connection, while only 2 to 8 amps can be measured in other cables. Over 220 watts of a total of 575 watts are on one cable.
This might match the melted plug error picture of the past few days, in which a pin on the graphics card had mostly melted, if in those cases the cables actually sat correctly.
Fused 12V-2×6 plugs (image: The8AUer)
150°C on a cable without load distribution
This huge charge and the high temperature which exceeds the 150°C mark in the additional test could be due to a lack of charge distribution of the GEFORCE RTX 5090 FE. While custom designs such as the ASUS ROG GeForce RTX 5090 Astral (test) monitor each pin of the 12V-2×6 connection individually and in the case described last on the individual pins. All 12 volt lines are a connection for them.
As a result, electricity seeks the path of least resistance and few lines are strong, but others are barely overwhelmed. Different resistances are sufficient at the output of the power supply or inside the cable – for example across different soldering connections.
More than 150°C is measured on the power supply connector (image: The8AUer)
All lines have a contact
The fact that all lines also have contact in the Roman Hartung test is shown by the fact that there is no electricity on everything, although sometimes weak and has no electricity.
Further studies with other cables or power supplies could create a clearer picture, when exactly this problem can occur or can occur and whether a very different charging distribution in the GeForce RTX 5090 Founders Edition can generally cause problems.
The computer base measured
Techtip verified the behavior itself with a GeForce RTX 5090 FE power supply on an ASUS ROG Thor 1200W Platinum II power supply which splits the 12V-2 × 6 connection on the power supply on two base basins, the cable is an official ASUS accessory. The Corsair AX1600i used by Roman Hartung also goes this way.
Different charging per cable can also be found in the furole, but the differences are considerably smaller and no single cable reaches around 20 amps. Minimums are measured in the test at the base of the computer on a 5.3 amp cable, maximum 10.6 amps. By the way, the cables are between 6.1, 7.4, 7.7 and 10.0.
Checking RTX-50 availability from Techconseil
Due to the low availability of the NVIDIA GEFORCE RTX 5090 FE, only a few users currently have to worry. However, if you’re still trying to buy an RTX 5080 or RTX 5090, you can use Techconseil’s RTX 50 availability check to always be informed if graphics cards are available at retail again.
Topics: Dangerczing Rentx Btx 50 Debizing RTX 5090 Graphics cards nvidia nvidia nvidia Blackwell Skid
An engineer by training, Alexandre shares his knowledge on GPU performance for gaming and creation.
