As if there were few problems with the lack of GeForce RTX 3080 cards on sale, as well as some problems with the performance of these very cards. Users began to complain about the problems associated with the departure from the games or the appearance of a black screen.
So far there are no official explanations, and there was no reaction from Nvidia yet, but there was one possible explanation. Perhaps it’s a trite economy, though with a caveat.
In the comparative photo above you can see the back side of the PCB directly behind the GPU. And you can clearly see the main difference. According to the specifications, there should be six capacitors for high frequency filtering on the voltage buses (NVVDD and MSVDD). And Nvidia allows to use in this place both more expensive ceramic MLCC capacitors and more available tantalum POSCAP capacitors. At the same time, the first ones are better suited for the available purposes.
As you can see, Nvidia itself uses both types of capacitors, probably balancing between economy and efficiency. The same goes for MSI. Zotac fully relies on POSCAP and Asus relies on MLCC. And it is with Zotac cards almost often, judging by the forums, the same problems happen.
It seems that these very capacitors are the main or one of the problems causing departures and other situations with RTX 3080. Moreover, the source mentions an experiment to solder one of the POSCAP capacitors to a group of MLCCs, and this allegedly had a positive effect, although there are no details.
As for the above mentioned caveat, perhaps the whole situation is due to the fact that the video card manufacturers simply did not have enough time for testing, because the working drivers they received too late. There is an assumption that Nvidia’s partners did not have time to conduct any audible tests at all, except for the basic ones, and as a result, the models with higher frequencies and insufficient quality element base suffered.