The Crucial M4 128 GB (mSATA) is installed and is my primary boot drive. This is a SATA III drive but I only see about 200 MB Second RW speeds.
I re-installed using Unibeast USB (10.8) and combo updated to 10.8.2 then used the new Multibeast 5.1.1 to setup boot loader, sound and Ethernet. Install and boot without the aid of command line arguments. And boot to the desktop is under 10 seconds.
I am still in the "learning curve" on this motherboard. I am running a DVI display 1920 x 1200 from the HDMI to DVI adapter and this works well.
The BIOS defaults are for the LVDS display active and primary. I could not get dual displays to work properly: I was using HDMI to HDMI display and Display Port to Active DVI adapter. I tried a number of combinations and was not happy with the result. I even locked myself out of the BIOS during this effort and spend some time learning how to reset the setup. Thus the "learning curve" statement.
Of interest, the new Hardware Monitor app that is part of the new Multibeast has an issue with reading the correct values of the Q77 chip - reports 123 degree C while it is actually running in the mid 30s C. The Hardware Monitor from MB 5.0.2 did a better job on this sensor but is apparently matched the FakeSMC version.
Also, I see that iStat Pro is no longer available direct. It also had a problem with ML and displaying the processes. There is a fix that works at
http://hints.binaryage.com/istat-pro-for-mountain-lion/
I find that the mother board as I have it setup on my work table uses 1.3 watts in the power off/standby mode, running idle at 28 watts and under full CPU load 41 watts (as seen by a Kill A Watt meter on the AC line to the Dell power brick).
Over all the mother board is solid on 10.8.2 with the HD4000. I am about a month away from being able to order the Loop L5 kit.
Have fun,
neil
Edit - I purchased a SIIG Display Port to HDMI adapter and it works. Now I have the Motherboard HDMI port with the HDMI to DVI adapter and the new DP to HDMI adapter and my two 1920 x 1200 displays are happy with full acceleration and adjustable resolutions. This combination survives a reboot where the prior combination of setups did not.
Next up is to put a top and sides on this and see how the temps and cooling go.
neil