Ok, the first image is the unit I thought had high HW issues, and the second image is the unit with low HW.
Restore the stock frequency on the first one. You can even overclock it, these HW rates are nothing to worry about. Anything below 1% of DiffA is fine, and you're nowhere near that.
Edit: set up a real backup pool, you don't want downtime if btcguild goes down.
most likely you do not have an hw issue.
for a back up pool join bitminter very honest operator i used him since the summer of 2012.
list him third on your list.