Will pci express 3.0 x16 card work in pci 2.0 x16 slot?
I have a MB that has a PCI 2.0 slot. I am wanting to get the R9 270 which is a PCI 3.0 and was wonder if it would work with my 2.0 MB.
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Yes, it'll work; PCI-E 3.0 is backwards compatible with earlier versions of PCI-E. There shouldn't be any loss of performance either, as a 270 is unlikely to saturate the bandwidth of the 2.0 specification slot. So you're good to go!