Was there a driver installed on connecting the units by windows? Can you check device manager for that? You may need to install the ftdi driver before
I have direct USB connection. What driver do I need specifically? I've tried with FTDI and it causes problems.
If you mine at pps, it depends on when blocks are actually solved, I think. This can be a long process, current block runs over 4 days now, https://eclipsemc.com/
Are you using a hub? This is mostly caused by usb-, driver-, or pool connection problems.
1 http://www.butterflylabs.com/upload/...etup_guide.pdf, I'm running 1.4TH at 800W total, units rated between 400-475GH/s.