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View Full Version : Are PCI express x16 2.0 and 2.1 backwards compatible with 1.0?


user1397
September 4th, 2010, 06:43 AM
title pretty much sums it up
user1397
September 4th, 2010, 07:03 AM
nevermind, found the answer:

http://en.wikipedia.org/wiki/PCI_Express#PCI_Express_2.0


PCIe 2.0 motherboard slots are fully backward compatible with PCIe v1.x cards. PCIe 2.0 cards are also generally backward compatible with PCIe 1.x motherboards, using the available bandwidth of PCI Express 1.1. Overall, graphic cards or motherboards designed for v 2.0 will be able to work with the other being v 1.1 or v 1.0.