While working on GPU-Z support for NVIDIA's new GeForce RTX Super cards, I noticed something curious. Each of the RTX 2060 Super and RTX 2070 Super is listed with three independent device IDs in the driver: 1F06, 1F42, 1F47 for the former and 1E84, 1EC2, 1EC7 for the latter. GeForce RTX 2080 Super on the other hand, like nearly every other NVIDIA SKU, uses only a single device ID (1E81). The PCI device ID uniquely identifies every GPU model, so the OS and driver can figure out what kind of device it is, what driver to use, and how to talk to it. I reached out to NVIDIA, for clarification, and never heard back from them besides an "interesting, I'll check internally" comment.
With no official word, I took a closer look at the actual values and remembered our
NVIDIA segregates Turing GPUs article, that was part of the launch coverage for the initial GeForce RTX unveil. In that article, we revealed that NVIDIA is creating two models for each GPU, that are identical in every regard, except for name and price. If board partners want to build a factory-overclocked card, they have to buy the -A variant of the GPU, because only that is allowed to be used with an out of the box overclock. Manual overclocking by the users works exactly the same on both units.