What is the maximum theoretical speed of PCIe x2 ?

[knowledge2121]

I have a laptop with a PCIe SSD which has 2150 MB/s SEQ read speed and Up to 1260 MB/s SEQ write speed...

I am wondering if the interface is PCIe x2 or x4....

 

[mdd1963]

If the sequential read speed is 2150 MB/sec, it would pretty much have to be x4 lanes...

Theoretical max is 32 Gbits/sec (4 GB/sec), with the best of the NVME M.2 variants now able to hit about ~3500 MB/sec reads from a single drive...