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Troubleshooting M5F QCode 59 and no SLI

Ferrum88
Level 7
So off the bat here are my specs:

M5F - bios 1408
2700K @ 4.6GHz
(2) Crucial 4GB 1600 ram
(2) EVGA GTX 670 in SLI (no overclock)
W7 installed on Samsung 128GB SSD
2TB WD HDD for extra space
Air cooled

Been running this since April.

Couple days ago, fails to boot. Q-Code 59. I set cpu and memory at default settings. Now boots to windows fine, I try overclocking the CPU a little bit. Finally get it up to 4.6. Everything seems normal.

Set the memory to X.M.P. profile @ 1600, Q-Code 59 comes back.
Swap memory between slots. Go to one stick, swap sticks, swap slots. Still Code 59.
Run Memtest for 2 hours on each stick separately. No errors.
Tried bios 1408, 1604 and 1802. No difference.

I'm thinking alright, possible bad memory. No big deal, I'll just run the default speed till I upgrade to 16GB.

Go to play a game and notice only one GPU, in the first slot, is recognized.
Both are getting power (fan is spinning) but not seen in bios.
Swap the GPUs between slots, still only one.
Try without SLI bridge. Nothing.
Try with one GPU in second slot, get the beeps on post that mean No GPU Detected.

I'm starting to think motherboard or cpu may have kaputt but not sure. It seems like a strange set of things to happen together but for all I know, I could be looking in the wrong place. I don't have a second CPU to try or any extra memory to eliminate them as culprits.

Sorry for the boat load of info. Tried to include anything relevant.

TLDR - Code 59, when memory at X.M.P. profile 1600 MHz and also no second GPU. Tried a couple of things. Need ideas.
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Ferrum88
Level 7
Everything working again. HiVizMan, thanks for all the help.