How many PCI(CPU) lanes do I need to build with an M.2 drive?

Question

Iron

I want to install a PCI-E 3.0 x4, M.2
CPU - Intel Core i5-9600K (PCI-E 3.0 x16) interface into a new PC, which the video card "eats" entirely. Does this mean that by installing a disk that requires 4 more lines, I will lose video card performance?
Thank you for attention!

Answer 1

In short, if - no, you will not lose.
for starters, this is the maximum number.
besides, have you seen the throughput of 4 lines even?
besides, there is also a chipset on the motherboard has its own lines.
Basically, don't bother. if there is a slot for m.2 and you do not have a configuration with several video cards .. then the manufacturer has provided. and still they use it)
otherwise there would have been advice all over the Internet for a long time "do not buy, and do not put m.2 and there will be +5 frames in games")))