PC Ekspert Forum - View Single Post - Nvidia GeForce RTX 50X0 series (Blackwell)

The Exiled · 06.02.2025., 19:59

Odličnost na sve strane, tak da možda i nije loše da se ove sfušane preskupe kartice nigdje ne mogu kupiti.

Citiraj:

User reports of faulty nVidia GeForce RTX 5090 and 5080 graphics cards come flooding in

Citiraj:

Today, a fully configured system from a well-respected UK system integrator has arrived at Club386 HQ outfitted with AMD Ryzen 7 9800X3D processor and GeForce RTX 5080 graphics card. At first boot, the system behaves as expected. At second boot, we’re hit by the same blank screen, which leads us to believe the issue is potentially widespread. Our internal testing is ongoing, but for the time being, forcing a PCIe slot to run at 4.0 x16 appears to be the most successful remedy, though even this doesn’t appear to guarantee success.

Izvor: Club386

Citiraj:

nVidia GeForce RTX 5080 and possible hotspot problems on the board – causes and workaround

Citiraj:

This article discusses a thermal hotspot caused by the compact arrangement of ten voltage converters for NVVDDs. These voltage converters are positioned very close together on the board, which means that the conductor paths with the generated voltage have to be routed to the GPU in a very confined space. Particularly affected are boards that are strongly based on the reference design and do not have an eleventh phase for NVVDD. In such cases, suboptimal cooling of the voltage converters (VRM) and the lack of passive cooling on the back of the board can lead to undesirable thermal stress. The focus of this article is on explaining the technical background to this problem and highlighting possible optimization approaches.

Thermal hotspots are caused, for example, by the much too dense arrangement of ten NVVDD voltage converters, which have to cope with high currents and generate heat through their own losses. Boards that are strongly based on the reference design and do without an eleventh NVVDD phase are particularly affected. The problem is exacerbated by the lack of passive cooling on the back of the board and the excessive gap between the VRM and heatsink. This arrangement leads to local hotspots, which not only impair the efficiency of the voltage converters, but in the worst case could also shorten the service life of the components. In tests, temperatures of up to 80 °C were measured in an open setup in a fully air-conditioned room, which can rise to 100 °C in closed housings.

To improve thermal efficiency, a pad mod with thermal putty was carried out to avoid problems with different pad thicknesses.

Izvor: igor'sLAB