RTX 40 series users are said to be using the latest BIOS to play Need for Speed Unbound.
When some users experienced flickering after the release of Need for Speed Unbound, EA announced that the cause of the problem was in the motherboard BIOS.
When I first articulated my position on this issue, I mentioned the graphics card BIOS, not the motherboard, but corrected that the problem was caused by the motherboard BIOS, not the VBIOS.
For reference, prior to the release of Need for Speed Unbound, Nvidia recommended updating the VBIOS as a solution to the same symptom and distributed the tool. The tool can be used not only for Nvidia Founders Edition but also for non-referenced partner products and supports RTX 4090 and 4080.