generally this is true. 2 of mine were originally given the wrong info and shipped with a delay though (ordered sunday and monday - shipped yesterday)

most of the time when i get a tracking number the miner is actually halfway to me. definitely not a scam

try 387.5 - its a good compromise between pushing the unit too far and good results.

the unit i just got has yellow/black power terminals and is actually running quite cool. 43/46 at 387.5MHz when my previous miners would have been in the 48-52 range for that.

disconnect ethernet, let it start beeping, turn off, wait 1-2 minutes, turn back on and connect ethernet

You are not considering the power efficiency. The antminers use about 3x as much power. 4.25BTC for 400GH would be fair IMO, and would expect a 6BTC return if delivered by the end of next week

i find it a joke that these are still going to be used for PCI-e ports. they will be far too massive, and it makes no sense in comparison to just using USB and having them external like the previous gear

add one to the list of machines with terrible fans.

no dust buildup like some of the other units people got, but the fan wont run at low speeds and needed a 'flick' to get it spinning once the miner was in operation, and is making a tremendous amount of 'clicking' noise.

I assume the blades are slightly nicking the hexscrews that hold the frame to the heatsink because i've had that issue with installing secondary fans before - though im not sure why this is the only unit out of 5 ive had where this is happening on the stock fan.

*for reference, my PCB is dated '2013/12/1' and has yellow/black power terminals and PCI connectors. I imagine that bitmain likely used it in their farm previously*

I loosened out the fan screws slightly to try and imporve the gap a bit but it doesnt seem to have eliminated the strange sound.

please, explain. The original monarch drawings all show it having roughly the form factor of a 7950 GPU. the most recent image shows a big card with ugly water blocks on it that is already much thicker than any GPU, and it doesnt even have a radiator or coolant resevoir on it yet, which would probably double its height again.

I mighr have more idea what im talking about if the monarch was actually on-time, properly prototyped, shown to those who had invested in it, and met specs (600GH air-cooled was the original promise'estimate', wasn't it?)

PLEASE, show us what BFL has now? as far as i can tell its ugly, late, and not nearly the promised specs. Additionally, the need for it to fit any PCI-card form-factor is no longer necessary for >90% of your customers since why would they want to add >150W of mobo/CPU to the power use of this thing when almost every other design available or coming out simply connects directly to the internet without a host computer?

grow up inaba. you have not made friends here, maybe its time your parents try moving you to a private school

If they deliver, thats pretty fantasic. They will probably mine less than you paid for the hubs, but Im sure you could find a resale market and get $7-15 each in bulk selling them when you are ready to upgrade

I would definitely snip the head off the ATX cable and use it for a blade on the antminer. you shouldnt run more than 300W on a PCI cable or you can have a lot of problems when it fails on you.

if your boards are 2.3, dont pencil mod. but a small tweak on the potentiometer will help you get those 30GH cards into the 33-37GH range if you do a tiny adjustment at a time

I guess it would be nice to see some pictures posted huh? First post is updated!

reviving this thread for its usefulness and to see what's changed.

I want to start a miner collective (co-op?) and expect that to do it on a larger scale will mean that tax records become a necessity.

any advice on how that would be done? can any costs be deducted (miner costs, electricity, etc) and would it fall under capital gains for [mining income-costs]-[hardware cost]?

additionally, if someone invested 10BTC with me to basically buy and host miners on thier behalf, how would that work? capital gains for them and then I am taxed on any profit I make? what about hardware costs or resale value?

'vi /etc/config/asic-freq'

pressing 'I' enters editing mode
pressing 'ESC' exits editing
':wq!' writes the file and exits back to the command line
reboot

some people really need to start by reading the first page of this thread

its a great setup, but why on earth are you buying/using USB miners? for whatever small amount of GHS you'll get from 42 USB sticks you could probably have bought a 200GH antminer

your opion includes several different BTC valuations. using today's rate, the math is MUCH different. and this still assumes that 1.25% of network hashrate is even a remote possibility.

no real difference. both methods just provide 12V power. If you have 2 seperate PCI leads from your PSU use them.

I have modified server PSUs, so I just run some nice thick 14AWG cable to the screw terminals and its both simple and cost effective

^this. its very simple to do. find a peice of scrap wire, trim it down to be about 0.5" long, strip 0.125" of the plastic sheathing at each end, pinch/fold it in the middle, and jam in into the 24-pin MOBO cable so that it creates a connection between the green and black wires.

if its snug on its own great. if not, a dab of glue, or a ziptie/electrical tape wrapped overtop to hold it in place is all you need. its not a high voltage or anthing, so dont put too much though into it.

at 7w/GH its a terrible idea and waste of money. for the power sonsumption of the 50Gh miner you could run a 200GH antminer - and the prices are not that different

IMO, too soon to sell an efficient machine like that.

that said, put it for sale in the local classifieds (craigslist, kijiji, etc) for 50% more than its capable of mining and see what happens. if it sells-great! if not-keep mining with it.

I sold some antminers this past week for far more than i expected. I sold 3 of them at $2750 each with power supplies and another for 3BTC with a power supply. More than enough money/bitcoins to order 6 more that deliver early next week (maybe 5.25 units if you consider the week or so of lost mining income)

+1. You can turn them off hot, its not like they will get hotter or anything.

however, i usually just unplug the ethernet, let it start beeping and wait a minute while the fan continues to cool down the heatsink a bit further. This is a bit overcool, and mostly  if i am moving the miner to a box or handling it in a way that it being 40C is not desirable