Reporting in with an odd problem.
One of my S5's went to hashing at half it's capable rate, despite all rows showing o's. A reboot resolved the issue.
Running stock firmware from B1.
People have reported that the newer firmware solves that issue.
I'm scared of upgrading

Guess I'll take the plunge. Thanks !
Edit: Updated CGMiner in latest firmware. Cool ! So far so good.
Edit2: Meant CGMiner was updated to 4.8.0 in the latest firmware vs 4.7.0 in the original firmware.
Edit3: Updated both my S5's. Latest firmware is solid
