I just did the drop down and chose S3 default, I saw S3+ voltage settings, but assume that won't work, especially I am only using 2 PCI-E in the miner.
OK, I fixed the 0Gh/s problem. No matter how many times I rebooted or what I did to my S3, I only got 0Gh/s. The fix was that I needed to physically reboot it. Now, its running fine on the 0103 firmware with the S3 voltage settings.
What voltage settings are you running?