You may want to reconsider a refund. With cheap BTC at the moment you can buy more bitcoins than you'll ever mine with these pieces of crap.
I'm an early Jan owner, got mine end of Feb. Already had to RMA it because I lost 1/2 the processors. I've made a whopping 5 btc
Refund requested today - kinda sad but cant be too emotional when on the path to ruin