http://i.imgur.com/iX1DhLe.jpg

As you can see, one is running at stock (getting about 441 GH/s usually), and the other is running overclocked (getting about 500 GH/s usually).  Both are very stable. I tend to restart the overclocked one once every 3-4 weeks or so (you'll see in the image I just restarted it, and it is still ramping up). The other one I never restart.

Make me an offer. I'll ship next day after payment is received. I kept the original packaging.