Ok, so I had three of my four B5's on 250 and they ran great but I felt like I might have been pushing my luck some so I put them on 243.75 and man, I must say, from philipma's expectations of what he said I should get. I'm doing pretty damn good.
The first image is the one machine that's never gone past 237.5.
http://www.eojmarket.com/NonForumStuff/images/bitcoin_stuff/820S30001.jpg
http://www.eojmarket.com/NonForumStuff/images/bitcoin_stuff/820S30002.jpg
http://www.eojmarket.com/NonForumStuff/images/bitcoin_stuff/820S30003.jpg
http://www.eojmarket.com/NonForumStuff/images/bitcoin_stuff/820S30004.jpg
The first image is the one machine that's never gone past 237.5.
http://www.eojmarket.com/NonForumStuff/images/bitcoin_stuff/820S30001.jpg
http://www.eojmarket.com/NonForumStuff/images/bitcoin_stuff/820S30002.jpg
http://www.eojmarket.com/NonForumStuff/images/bitcoin_stuff/820S30003.jpg
http://www.eojmarket.com/NonForumStuff/images/bitcoin_stuff/820S30004.jpg
Indeed. 243.75M is the new 250M; at least for me anyway. At 243.75M, my units draw less power at the wall (413W at 29C) with lower HWE% and better hash rates than at 250M. Go figure.
Thanks to philipma1957 for the additional frequency codes. Now, if he could only do something about my fan speed readings
...
To reiterate, each is only powered by a dedicated Corsair CX500 80 Plus "Bronze" PSU with only 2 PCIe power inputs:
