快车道中的生活(Life in the Fast Lanes)
PCI-E has gone through multiple revisions since its inception; currently new motherboards generally use version 3 of the standard, with the faster version 4 becoming more and more common and version 5 expected to hit in 2019. Butthe different revisions all use the same physical connections, and those connections can come in four primary sizes: x1, x4, x8, and x16. (x32 ports exist, but are extremely rare and generally not seen on consumer hardware.)