Quote from: k2_1971 on January 09, 2014, 12:26:33 AM

I have a cube where one of the mini-blades does this also (OOOOOOOOXXXXXXXX). By restarting the cube through the web interface, I can sometimes get that card to display all O's, however one of the chips will read '999' and stay stuck at that value, and the entire cube will only run at about 10-15% efficiency and the hash rate suffers considerably, regardless of clock setting.
Ever seen that behavior before?

Common issues that can cause erratic behavior are loose heat sinks, unseated cards, and insufficient power.

I have not personally seen the behavior you describe but I think I saw something similar in this thread:
[Guide] Dogie's Comprehensive ASICMiner Cube Setup thread (https://bitcointalk.org/index.php?topic=352658.0)
(Print view is easier to digest and search in some cases: https://bitcointalk.org/index.php?action=printpage;topic=352658.0)