I have a 7950 x vapor 3gb and I want to know if I need to get a new motherboard right away or if my current one will let stuff a big ol 7950 in it?

My motherboard only supports PCIe 1.1 x16.
ecs nettle3 (2.2) mainboard specs

It says, but my friend says it will still work.
PCI Express® 2.0 or higher version based PC is required with one X16 lane graphics slot available on the motherboard in order for the card to be compatible with.

SAPPHIRE Technology