Final answer:
PCIe Version 1.1 and PCIe Version 1 have the same throughput of 2.5 GT/s. PCIe Version 2 has a throughput of 5 GT/s, which is twice as fast as Version 1.
Step-by-step explanation:
The throughput of PCI Express (PCIe) Version 1.1 is 2.5 gigatransfers per second (GT/s), while PCIe Version 1 has a throughput of 2.5 GT/s as well. Therefore, both versions have the same throughput.
On the other hand, PCIe Version 2 has a higher throughput than Version 1. It has a throughput of 5 GT/s, which is twice as fast as Version 1.