Question: is pcie 3 backwards compatible?
Answer: Speaking at a conference yesterday, Yanes revealed that PCIe 3.0 will be backward-compatible with the current 2.0 standard and that it will use the same connector designs. However, where PCIe 2.0 can transfer data five billion times per second per direction per lane, ExtremeTech says PCIe 3.0 will hit 8GT/s.