Is the VIA chipset PCI Express backwards compatible

MrAcd

Honorable
Feb 21, 2013
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I have a gt 9800 EE and it works in 4 computers except the one I need it to in, it is the ECS PT890T-A motherboard, with the via chipset, I read 2 other forums that said there gt 8800 didn't work with there VIA chipset, becuse it was either the gpu or the gpu to that chipset that isn't backwards with PCI Express gen 1.0, can anybody confirm that is it that it has been 5 months now.