@allinvain

Sorry for the delay. I know that "what if" doesn't interest anybody, I am just saying it works great without modification. Most of the chips work, I've listed 13 bad chips that are not dead so as sometimes they get back to work at normal average stats. The photo of the shifts I posted where it reached 900 GH/s was taken on ghash, and i shows the results for only this bitfury. What kind of demonstration would you like me to show ?

I dind't  wrote "that any bitfury kit is capable of reaching 800 GH", I just said that mine did.
13 BTC is definitly not the right price...