As previously reported, some owners of NVIDIA GeForce RTX 3080 graphics cards complained about problems with the launch of games to the desktop in cases where the increased frequency of the GPU exceeded 2.0 GHz. As it turned out, the same situation is observed with regard to NVIDIA GeForce RTX 3090 devices, which began to enter the market last week.
Colorful was the first to report the problem (albeit unofficially), mentioning the unstable work in an email. Already on September 17, the first users of the new NVIDIA GeForce RTX 3080 video cards began to complain about the problem. This was followed by a wave of publications on specialized resources, and only on September 26, some video card manufacturers made their first official statements.
As far as can be judged from the first reports from manufacturing partners, the cause of the crashes to the desktop was probably the capacitors located on the board behind the GPU. In the GeForce RTX 30 generation, they are easy enough to see, since most manufacturers did not cover the corresponding area of the board with a back plate. These six capacitors are designed to filter the NVVDD / MSVDD voltages of the GPU. The better the voltage filtering is, the less likely problems will arise when operating at high frequencies (factory overclocking). Accordingly, the worse the voltage filtering and the higher the clock frequency of partner versions of video cards, the more likely it is that users will face the problem of the game crashing to the desktop.
The problem, for the most part (at least based on the information available at the moment), is associated with the choice of types of specific capacitors. Manufacturing partners should follow NVIDIA guidelines and use either POSCAP (Conductive Polymer Tantalum Solid Capacitors) or MLCC (Multilayer Ceramic Chip Capacitor). POSCAPs are highlighted in red in the images, MLCCs are in green. A combination of capacitors is also possible and is actively used on many video cards, including the Founders Edition series.
Insufficiently defined guidelines can also be part of the culprit because partners rely entirely on this documentation, especially when proper pre-launch testing is not possible.
As it turns out, video cards from manufacturers that used more MLCCs instead of POSCAPs are less likely to suffer from crashes to the desktop in games.
MLCC capacitors are cheap and compact, they operate at rated currents, voltages and temperatures, but are prone to cracking and piezoelectric effects, and also have poor temperature characteristics.
POSCAPs are larger in size and have lower voltage, they perform worse at high frequencies. However, they are stronger and not prone to cracking, they also do not have piezo effects, they should perform better at higher temperatures.
So far, in addition to Colorful, some other manufacturers have commented on the situation with this problem and responded to it. For example, Colorful recalled the first samples sent for reviews. EVGA clarified that during mass production, tests found that the 6-capacitor POSCAP versions were not capable of being tested in real-world applications. After nearly a week of research and development, an optimal solution was found, which involves the use of 4 POSCAPs and 20 MLCCs. This delayed shipments of the EVGA GeForce RTX 3080 FTW3 series devices. All mass-released versions of EVGA GeForce RTX 3080 FTW3 do not include 6 POSCAPs. But the preliminary samples that were sent out for the reviews contained exactly 6 POSCAP capacitors. They will be replaced with the final mass versions. The EVGA GeForce RTX 3080 XC3 range includes 5 POSCAPs and 10 MLCCs each meeting the XC3 specification and has no problem.
ASUS and ZOTAC have made configuration changes to their products, and MSI speculated that the issue could be related to drivers.
So far, there is no unambiguous data on whether the capacitors themselves are to blame for the problem or whether other factors are also influencing.
Prepared on the Internet list released devices and circuits for using capacitors in them.
A source: videocardz