PCIe version 2 operates at a frequency of 5 GT/s (gigatransfers per second) per lane. This translates to a raw data transfer rate of approximately 500 MB/s per lane, effectively doubling the bandwidth compared to PCIe version 1. Additionally, PCIe 2.0 supports multiple lanes, allowing for greater overall throughput depending on the configuration, such as x1, x4, x8, or x16.
PCIe version 2 doubled the fequency of the PCIe bus, theoretically doubling the throughput, It also allows for up to 32 lanes on one slot
1.1 and 1 were the same allowing up to 16 lanes at 250 MB /sec per lane in each direction, Version 2 allowed up to 32 lanes on one slot and up to 500 MB/ sec per lane in each direction
doubles
yes it does
PCIe Version 1.1 and PCIe Version 1 have the same throughput.
300 watts
Witchcraft! No, in all actuality it will work completely fine, as long as they are both indeed PCIe. You should be good to go!
8 pin power supply
pcie 2.1
10
10
1.1 and 1 were the same allowing up to 16 lanes at 250 MB /sec per lane in each direction, Version 2 allowed up to 32 lanes on one slot and up to 500 MB/ sec per lane in each direction