A Small Update:
As I had stated earlier, I have the High Point Rocket 640L PCIe Controller card that has 4 SATAIII ports. The card has a boot time BIOS set-up program that provides the ability to set up RAID sets. My intention was to determine which gave me better performance implementing a 2 drive RAID 0 set using 2 small SSDs. The comparison is between using the Z77 chipset and OS X software RAID 0 and the Rocket 640L RAID 0 using the same pair of drives. Using ML 10.8.2 and Chimera 1.11.1 for bootable RAID sets.
I was frustrated initially with the Rocket card. I could not get into it's set-up program, the machine would go into the motherboard POST and not see the Rocket set-up. I might note that the Rocket card is OOB functional as a drive controller card.
So going back to the initial forum posting:
http://www.tonymacx86.com/mountain-lion-desktop-guides/81854-software-fusion-raid-alternative.html
and found a hint to needing a motherboard BIOS update. I was running the F11 version and updated to the beta version F12e of the UEFI BIOS. Then with the new BIOS the Rocket card presents a boot time status screen, and entering Ctrl + M you can enter the Rocket 640L set-up utility.
I made up a mounting bracket for the two new SSDs hanging them above the 3.5" hard drive.
Before view.
And while I was in this area, I raised the 3.5" drive mounting by 1/4" for better clearance of the cabling below the drive. And relocated the front panel (actually the right panel) USB3 ports cable from the motherboard USB3-1 connector to the USB3-2 connector as it has been reported to give better performance.
Bench mark the two SSDs running on the Rocket 640L. Not what I had anticipated.
Then reconfigured the setup using the two white motherboard SATAIII ports, the OS X software RAID 0 set runs very well. I might note that the boot time is amusing. The white boot screen flashes up, the Apple logo is displayed and then the desktop is presented; maybe a 2 or 3 second boot!
As an aside, the pair of SSDs are SanDisk 6Gbs 128GB model SDSSDP-128G-G25 sourced from NCIX.com.
I am still exploring the capabilities of this awesome motherboard. I have had both HD 4000 and the HD 6870 working concurrently with three displays. And have used my Apple Thunderbolt to Gigabit Ethernet adapter on the first TB port to my Gig-E switch; works without issue or OOB.
I think that overclocking is up next and I will see how far I can push it without up grading my current CPU cooler.
Have fun hacking,
neil