So my 3 ASUS ROG MARS cards with 2 GTX 760 chips on one PCB arrived.
Album link here!Some impressions:
-cool red blinking MARS logo on top. Even cooler than the GTX 780 TI's.
-nice metal back plates, but the plates do take space and so the air convection in the narrow space between adjacent cards is degraded.
-nvidia-smi under Linux (hacked with nvml_fix) shows a TDP limit of 214W per GPU. REALLY?! That's then 428 W per card.
I am currently having some thermal issues with the cards not receiving enough air. Some of the fans run 100% and the GPUs still show 98 deg C.
And this is with Yacoin which doesn't max out the TDP fully

When I forgot to remove some plastic protective cover from the back plates, it got sucked into the fan of the adjacent boards.
I had to cut the power immediately to clean up this mess...
Power draw seems to be 900W when mining near 20 kHash/s.
Christian