I wish I could sell my X1. But it hashes only at 60% of it's specification and if I send my hashboard for RMA to BA I should pay the shipping costs. So I have the choice to run it at 60 GH/s although I purchased a 100 GH/s miner or to throw away even more money to get a miner running as specified, maybe...

http://ecointalk.net/topic/1433-x1-underperforming-at-60-70-ghs/