Posted 29 November 2007 - 04:40 PM
PCIe 2.0 is completely backward compatible with PCIe v1.x, so graphic cards and motherboards designed for v2.0 will be able to work with v1.0 and vice versa. According to Anandtech:
The transition to PCIe 2.0 won't be anything like the move from AGP to PCIe. The cards and motherboards are backwards and forwards compatible. PCIe 1.0 and 1.1 compliant cards can be plugged into a PCIe 2.0 motherboard, and PCIe 2.0 cards can be plugged into older motherboards. This leaves us with zero impact on the consumer due to PCIe 2.0, in more ways than one.
Copied from wikipedia
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