I have two of the old style blades. one has been chugging along nicely at 10 Gh/s with the low clock. today i started the second one. They are both sharing a 490 watt supply. the second one came up with a bunch of Xs. powering on and off got it down to 4 Xs it was running at about 4Gh/s and after the last restart is running at 1Gh/s. is this a power supply issue? do i need to give each it's own Power supply? Both are using the same Slush proxy with unique workers. 
Make sure the blade is properly connected to power. You'll want 16gauge wiring at least, and make sure you have 2 grounds and 2 positive going to each connector, using each port on the green connector. Once you verify your wiring is proper and the connections are not loose, verify your 12V rail can support 110watts for each blade you have. I'm sure it does.
I use a 330watt AC to DC convertor (not a computer PSU) and it works perfectly for me, running each blade at 14GH. Cooling and proper power connection is critical for these tempermental things.
now i get the following error
Failure: stratum.custom_exceptions.TransportException Failure:
Failure: stratum.custom_exceptions.TransportException Failure:
Is slush's proxy x64 compatible?