For first time (outside of an Nvidia or Apple lab) a cMP booted with a GTX750 in it. I held the "Option" key and choose my boot disk. Have been playing usual tricks but it wasn't working, asked my friend Netkas to have a look. He is, as usual, brillaint. Together we hammered through the rough spots. Still some fine details to be worked out, (PCIE 2.0 and DP boot screens) but getting first Maxwell popping those screens up gives me better hope for 970/980. Thanks also to Dr. Barbara Keller from whom I got the brains to do these tricks. You will be missed. Have been told that I am a "twit" so naturally we had to get a "twitter" thing going. When 970/980 get figured out, you'll know.