I would really like to know what they can reach, and with what wattage. Hopefully some will be in stock soon.

Better than disabling dead chips are remove it and short appropriate jumpers. You save energy for rest chips and can overclock little more.
If you haven't  appropriate equipment for that, go to any laptop repair service.

https://www.dropbox.com/s/xwl9p8pv1p0guh8/20131026_121407.jpg

I've some questions ... maybee some one has a good solution ...

I'm using a multi rail atx psu ... 1200 Watt ... at which 2 miners are connected.

So if I want to do some overclocking at the moment I've to shut down both miners ...

What solution do I have to only shut down the miner Im modding ....

1) just pull out the pcie ... one by one on the miner? dangerous? also is reinserting to have it on again ... a problem when connecting one pcie after the other when psu is on?
2) is there a switch for a pcie cable? ...
3) a second psu ... yep i got one but i would be happy to only use ... one ...

thanx or your help

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Anyone else: Thanks for the input Of course, any science is in English, so the report will be written in English as well. Luckily Indians with PhD's in English cost 5-10$ an hour, so they can fix all that spelling/grammar stuff! :-D

Thanks for your help. That really made a difference. (Oh yeah, and funny fact: most people on the forum is not born English speaker).

Slightly extreme article, seems like a reaction piece to the WU stock oscillations. And even if the US authorities end up imposing the more extreme outcomes, Bitcoin will still survive in the US without a doubt, and it will continue to get used for remittance. It'll just be a huge advertisement for Bitcoin's international transfer advantages ("So dangerous to WU they tried to shut it down" etc). I think we all know that it's not disappearing from TCP/IP traffic anytime soon, whether or not it needs to be secreted in an encrypted sub-layer of the internet in the authoritarian US.

WU investors are right to be concerned long term though, it's dead in the water before the end of the 2010's.

I have good heatsinks but perhaps could use slightly larger ones on the regulator/inductor. 0.865-0.87 is good for 40GH on my boards, but the pencil mod ramps up to maximum (or minimum?) resistance over a few days and its difficult to get the exact balance. once it climbs to >0.88v the boards become unstable and i see high error rates followed by entire boards or just some of the chips dropping to 0 every few hours and upkeep is a PITA.

i'm sure if i had cold air moving through the heatsinks (rather then the 21 C room temperature) I could reach 0.9V though, or at least achieve a stable 0.88v

   OC to .95V overkilled and must have heatsink + fan.

impressive. I cant get past 0.88v (39-41GH per board) without having chips or boards drop to 0 hashrate or produce massive3 error rates time to time

What is that monstrosity you have on the inductor?  Good gravy man, looks like a rhino ran it over.

Nice results, goxed.  What voltage are your boards at (once they're heated)?

In stock H boards ship immediately but they only work with the older M board.  I bought 4 of them and they are nice hashers right out of the box with no OC mods.  Averaging about 33GH/s per board.

what about if all the chips had parallel power, and the m-board (or an external PSU) simply provided 0.85V?

Well, I suspect someone experimented with stuff that even bitfury himself said isn't worth the try. The issue is how to provide the 0.6-0.9V VDD for the chip. On the melted boards I don't see a power regulator (the thing that most people used to "pencil mod").

The chip was designed to support "chained VDD" configuration - in this case if let's say you have 5V power supply and you want to feed that into 8 chips you can chain them one after another and presuming everything works fine each of the chips will get 0.625V (or 5V/8chips). It's the same as wiring a bunch of christmas lights in series.
Everything works fine until one of them shorts. Then instead of each chip having 0.625V they'll get 0.71V (or 5V/7) which will make them produce more heat. When the next one fails the voltage goes to 0.83V (5V/6 chips), and with the next one it goes to 1V per chip. Etc, etc. etc.

So basically things turn from bad to worse very very quickly.

If you're interested in the technical details - that's a good place to start:

I'm going to release V2 H boards at a new price - once we figure out how many we have available (so, after we ship all of October first, and may/may not be in November).  Yes, the boards currently in the store are for V1, however a number of people who ordered additional H-cards with their October starter kits will get the proper H-cards for their M-boards.