[citation][nom]banthracis[/nom]Well from the articleThe article talk about the upper slot specifically being limited to x8 in the case of 1 GPU. However, it doesn't mention about the other slot. Is it possible it still steals the 2 lanes and can run 1 gpu at x14 if it's in the second slot?? Dunno, Tom's or manufacturer is gonna have to clear this up.[/citation]
I think it's pretty clear: The quote you showed said that the two controllers force the upper slot to x8 mode. The upper slot is the primary graphics card slot.
Sorry, there is no specification to allow x14 transfers. Your only choices are x8 with PCIe 2.0 controllers, x16 with no PCIe 2.0 controllers, or x8/x8 on two slots with no PCIe 2.0 controllers. Given that little tidbit, the a P55A-UD4P's extra controllers would have been useless in a 5970 or dual 5870 system.
I think it's pretty clear: The quote you showed said that the two controllers force the upper slot to x8 mode. The upper slot is the primary graphics card slot.
Sorry, there is no specification to allow x14 transfers. Your only choices are x8 with PCIe 2.0 controllers, x16 with no PCIe 2.0 controllers, or x8/x8 on two slots with no PCIe 2.0 controllers. Given that little tidbit, the a P55A-UD4P's extra controllers would have been useless in a 5970 or dual 5870 system.