What is the difference between PCIe Gen 3 and PCIe Gen 4?

Gen 2 slot About PCIe PCIe was For instance, PCIe x4 refers to a Gen 3 expansion cardslot with 4-lane configurations

PCIe Gen 4 was revealed in 2017 Graphics cards and storage solutions supporting the specs were then launched in 2019 NVMe SSDs supporting

m24 slot 3 I225-LM x 1); 22802242 M-Key x 2, 30423052 B-Key x 1 + Micro SIM Slot x 1, Mini PCIe x 1 + Micro SIM Slot x 1; USB Gen 2 x 2, USB Gen 1 x 4

m2_1 slot PCIe gen 4 was able to reach a bandwidth of s whereas the PCIe gen 3 was only able to reach s That is a 39% benefit if you were