You are correct the processor supports a maximum of 16 Lanes. The rest of the motherboard lanes are going to be disabled. If you are planning to have 2 NVMe SSDs and dedicated graphics card x16; the graphics card is going to work with only x8 and consequently some performance loss.
In order to get a better experience, it is better to use a High end processor with socket type LGA2011, for example: Intel® Core™ i7-5930K or i7-5960X or i7-5820K, they have 40 and 28.
are you working for Intel?
Your answer is incorrect and embarrassing. Chipset PCIe lanes are additional lanes on top of the lanes provided by the CPU