So, you finally managed to get your hands on an RTX 5090 after the paperwork cleared ... The problem could be missing ROP hardware, and now CPU-Z can narrow it down for you with its latest update.

TL;DR: CPU-Z Validator now alerts users if their NVIDIA GeForce RTX 50 series GPU has missing ROPs, which can reduce performance. This update helps identify affected GPUs, such as the RTX 5090 ...

CPU-Z now includes a detailed GPU diagnostics verification system You can check the ROPs of the RTX 5090, RTX 5080, and RTX 5070 Ti Nvidia has claimed it affects less than 1% of the RTX 50 series ...