Hey, I have just received my S5, powered it up (both hashing boards has a red LED light). But its only doing around 600GH/s. Any ideas why?

http://i.imgur.com/D7PJCrM.gif


Also getting a lot of these messages in cgminer:

[2015-03-31 11:46:01] BTM 0: invalid nonce - HW error
 [2015-03-31 11:46:01] BTM0: No matching work - HW error

Could it be power problems on one of the boards?

EDIT: Think I found the problem, its one of my PSUs.