@or-ex: Ok, so i use a sabertooth p67, will i need a new MB to take advantage of PCI-e 3.0?
Yes. You need the right PCIe 3.0 support chips, PCIe 3.0 device and an Ivy Bridge CPU to utilize PCIe 3.0 at its full speed.
@or-ex: Or is it just a BIOS update?
No.