Nightmare with the sabretooth 990fx AM3+

Hey all,

Okies, I just bought all the parts to build my new machine, I'm using some from the others around here, heres the spec of the machine and then I'll describe my issue,

New- Asus Sabretooth 990FX
Old one- AMD Phenom II x2 BE 555 can unock cores 0,1,2 and oc to 4.2Ghz(stable on prime95 for 8 hours on my ASrock board)
new-16gb OCZ Obsidian 1600 9-9-9-16
new-750w OCZ ZT fully Modular
new- Monolith Full Tower Case
new- 3 x OCZ agility 3 256gb
new- 3 x momentus xt 750gb
new- 2 x baracuda 2tb
new- BD drive rec
new- OcUK Tech Lab - V12 Watercooling Kit 360 on cpu -
old- Gigabyte gtx 560Ti 1gb super overclock 3 x sli

My problem is this, my phenom is an old cpu and I love it, so I'm reluctant to swap it out, although the fx 81 looks tasty. When I build the system and did a dry test boot (no drives or cards just the psu and M/B with ram 1 stick of ram and cpu with cpu cooling block, the CPU led on the M/B lit and stayed lit, I tried powering down, and clearing the bios by hoping the jumpers, 1- to 2-3 then power up and and down reset to 1-2. I tried, reseating the cpu and re-apply AS5, i tried switching the ram, I exhausted everything I know and thinking of an RMA to dabs, I know it's not my cpu or ram as they work on another build. I've triedout of case booting, in case booting, dry and wet cooling, changed psu from my ocz 750 to a corsair 550w gold.

Is there any tricks to the sabretooth? besides throwing out the window!! This realy sucks, I got this little voice in my hed saying it's a DOA, but a louder voice saying ASUS would never do that to me lol.. Any suggestions would be great

thanks all