Hello,
I have two V2 blades and a cube connected to Slush's stratum proxy. The hardware itself seems to be in good shape, all three devices achieve the desired hashrate but after about five minutes - they restart. Every time this happens they need a few moments to get back up to speed and in the process I lose tons of hashes. The blades average out at only about 7.5Gh/s (out of 10Gh/s) while the cube averages only 25Gh/s (out of 38Gh/s), I'm guessing since it takes longer to reach its target rate upon restart.
So far I've tried different pools and exchanged the power supply to see if those could be the problem, but the results were the same. Honestly any information would be greatly appreciated and I'll tip whoever can make this go away. I feel like a noob for not being able to figure this out, but I'm treading in the dark.
It's likely a heat issue, have you checked that? If the cubes get hot, it's likely to reboot to cool off... are you running it in High or Low mode? If High, does it change running in Low? If it's Low, is the air that's being sucked in cool or warm? You can try putting it a cooler area of your home or other cool location. Sucking in air isn't enough, it needs to suck in 'cool' air....
As a test, you can set one in your window (if it's cold where you are) and it's not wet outside... have it suck in the cold air and exhaust into your home. If it doesn't shutdown, then snap... you found the problem, heat. My $0.02.