P8Z77-V Pro (G.skill F3-12800CL9D-8GBXL) Wont Boot Dual Channel.

Hi,

I recently purchased an Asus P8Z77-V Pro Motherboard, and tried using my current G.skill F3-12800CL9D-8GBXL RAM with it, however, I cannot get it to boot when set in dual channel slot, though, boots fine when in single channel, first off, I thought that it may not be compatible, but would it even boot at all in that case?

But it clearly states on G.skill's website, that it is compatible (http://www.gskill.com/products.php?index=355)

"XMP Ready for 1st, 2nd and 3rd Generation Intel Core Processors"

　
Qualified Motherboards List

　
ASUS MAXIMUS V GENE
ASUS MAXIMUS V Formula
ASUS SABERTOOTH Z77
ASUS P8Z77-V PREMIUM
ASUS P8Z77-V DELUXE
ASUS P8Z77-V PRO

I tried updating the bios, however, failed to account to anything.

Anyone else have any ideas?