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3521  Bitcoin / Group buys / Re: [Closed]Avalon Chips - 0.081 BTC (Global+Escrow)-BATCH2 SECURED on: October 08, 2013, 09:45:50 PM
I still have no refund for my website order of a single K16. Ive sent a support ticket via the site over a week ago.
3522  Bitcoin / Hardware / Re: [ANN] US/North American Bitfury sales now open ***full prototype pics*** on: October 08, 2013, 08:40:46 PM
I've mentioned before that i would be especially interested in coloured PCBversions (black, red, blue, etc) to liven up the system

You can have any colour as long as it's green Wink

spiccioli


phooey! I like rainbows  Grin 


c'mon, even black would be really cool, more then basic 1990's green
3523  Bitcoin / Hardware / Re: [ANN] US/North American Bitfury sales now open ***full prototype pics*** on: October 08, 2013, 07:20:33 PM
Dave -

Makes sense not coming out with new kits.  But what about cards?  I can't be the only one who would jump at filling out my 25 GH/s kit with some reasonably priced cards.
Yes - I know there are 15 left on the site at $500, but those are not reasonably priced.  I know you have to make a profit, but I have to believe there is some middle ground on the pricing.

+1

im sure there are many of us with only 1 or 2 card systems, itching to fill them up. However, I would not pay more than:

Nov 1 delivery: $350
Nov 16 delivery: $275
Dec 1 delivery: $200
Dec 16 delivery: $150

considering that the boards are quite simple (4-layer PCB, 16 chips, and a few components for power conversion), it should not be difficult to produce them. I've mentioned before that i would be especially interested in coloured PCBversions (black, red, blue, etc) to liven up the system
3524  Bitcoin / Development & Technical Discussion / Re: Vanity Pool - vanity address generator pool on: October 08, 2013, 06:16:38 PM
How would i request:    1klondike......  ?
3525  Economy / Service Announcements / Re: [ANN] Bitfury ASIC sales in EU and Europe on: October 08, 2013, 05:57:41 PM
"All bids are made by sending 1% of your target BTC bid price to 1HzNCRi3Qq3xKj9hyumLG6hhaYwaTPB7dq"

200BTC bid in place now it looks like = 0.015BTC / chip = 0.007 BTC/GHS approx
asking price on the site = 0.33BTC/chip = 0.15BTC/GHS approx

there is over a magnitude of difference in price
3526  Bitcoin / Bitcoin Discussion / Re: If they do, when will the FBI announce to sell their alledged 600k BTC stash? on: October 08, 2013, 05:44:44 PM
All that the FBI has is 26,000 BTC and a HDD/computer with DPR's encrypted wallet.

1) the wallet is encrypted, so whatever it contains does not belong to them until they obtain the private key - hacking/decrypting is not a possibility
2) DPR almost certainly used some of his coins to pay for things or trade for USD. It is likely that the wallet holds <300,000 coins at the most
3) It is almost unconceivable that DPR did not create a backup of the private key, or some form of "dead man's switch" that makes it easy/automated for the FBI's precious wallet to drain anywhere else in the bitcoin network without them being able to stop it.

3527  Bitcoin / Mining support / Re: [GUIDE] BitFury Miner Support/Tuning on: October 08, 2013, 12:06:23 PM
Had to hard reset.

These things require so much babysitting it aint funny anymore/

I thought that, but then i backed off a bit on the tickering and let it do its thing. After about 6hrs to fully warm up and reach peak voltage, Ive been stable for 48hrs at 39.9GH/s average (+/- 2GH on the hourly reading)
3528  Bitcoin / Development & Technical Discussion / Re: Brute force private key tool? on: October 08, 2013, 12:50:18 AM
so  its *virtually* impossible to simply keep creating 30-character codes and checking to see if they are existing wallets with balances? I know the odds are slim, but what prevents making a million potential private keys, and checking them all to see if any "click"?
3529  Bitcoin / Bitcoin Discussion / Re: 600,000 coins gone!! DPR's personal wallet un crackable! on: October 07, 2013, 09:28:38 PM
What are you saying? It's actually possible to have more than one copy of a digital file?? Grin
You don't even need a copy of the wallet file, just a hand-written private key will do...
Maybe he just has a flyer for a concert lying around in his bedroom, with a QR code actually containing the private key.

He might even know it by heart, I know I would if I had an address with 600k BTC.
Isn't it even possible to generate a deterministic wallet with a seed phrase in some applications? He may be able to restore his wallet by simply recalling a short phrase.

Exactly. Is it possible to get internet access in prison? If so, its as easy as downloading electrum, remembering "ticket hat grasshopper magazine painter nose" and transferring all your coins to a new address. Then, no amount of noobing on the part of the FBI can get at the coins.

ahahahahahahah  Grin you haven't seen prison
3530  Bitcoin / Mining support / Re: [GUIDE] BitFury Miner Support/Tuning on: October 07, 2013, 05:58:56 PM
can someone explain the "coreOK" stat better for me? I sometimes see chips with this as 0 or <10, and other times they are all in the hundreds.

When i start the miner, all chips report 756. within 5 minutes they are all under 700

Each chip has 756 cores. The software tracks which cores have found good nonces. You can see the full details in /tmp/.core.log

The numbers you're looking at are actually how many cores have *not* yet found a good nonce. Over time, if all cores are good, that number will approach 0.

oh terrific, thanks. I was getting concerned to see some chips hitting '0' for this, and letting the crazy in my head associate it with temporary hashrate drops at the pool or chips switching off to 0 noncerates.

->  The chips turning off was fixed by a few more voltage tweaks - 0.825V across the caps seems to be the best, with tuning at 54 on 15 chips, and chip 1 at 53, I have a stable 38-42GH/s hourly rate (24hr average of ~39.85 GH/s).

At 0.840V i was getting about 41.5GH/s, but a chip turning off now and then bringing me down to 39GH. Not sure if this was a temp or voltage issue, but ive got some bigger 35x35x6mm heatsinks coming that i plan to strap 4 of on each board
3531  Bitcoin / Hardware / Re: [ANN] US/North American Bitfury sales now open ***full prototype pics*** on: October 02, 2013, 10:32:39 PM
can anyone enlighten me to the "coresOK" stat? (12th column of output in stat.log) - I see my chips range anywhere from 0-300 for this value, and it seems to have little or no correlation with the hashrate reported. hashrate at the pool is hard to judge, but i have the impression that low coresOK values result in slightly lower reported
3532  Bitcoin / Mining support / Re: [GUIDE] BitFury Miner Support/Tuning on: October 02, 2013, 10:27:25 PM
can someone explain the "coreOK" stat better for me? I sometimes see chips with this as 0 or <10, and other times they are all in the hundreds.

When i start the miner, all chips report 756. within 5 minutes they are all under 700
3533  Bitcoin / Mining support / Re: [GUIDE] BitFury Miner Support/Tuning on: October 02, 2013, 09:33:13 PM
I'm still totally uncertain if I want to use these guys or not: http://www.amazon.de/gp/product/B004BU6ITM/

I'm scared of heat congestion between the boards getting worse. Just blowing the heat away softly through the naked gaps will help the best I think.

id make sure to use a heatsink less than 10mm tall. 6mm would be better
3534  Bitcoin / Mining / Re: BitReturn.com - Introducing new Bitcoin mining forecast and ROI calculator on: October 02, 2013, 09:09:56 PM
someone needs to make a forecast like this that accounts for the point where the network tapers out slightly. at current BTC value there is no way any current/soon-coming miner would be profitable past february due to power consumption limitations, and this would create a ceiling to the exponential growth
3535  Bitcoin / Hardware / Re: [ Is This For Real????]Turbo USB Block Erupter on BitMit 460 MH/s on: October 02, 2013, 09:04:07 PM
I really am tempted to do this, but then yet, setting up a blade is difficult an dim not a expirienced tech guy.. Sad

avoid asicminer gen1 products. the reason isnt just for hashrate, but power use:

GPU: 200-400w/GHash
FPGA: 50w/Ghash
asicminer gen1 : 6-7w/GHash
BFL gen1 : 5-8w/GHash
KNC: 1.4w/GHash
bitfury: 0.8-1w/GHash
cointerra: 0.6w/GHash (claimed)

if you dont get under 2w/Ghash you'll be mining at a loss due to power consumption in the very near future

3536  Bitcoin / Mining support / Re: [GUIDE] BitFury Miner Support/Tuning on: October 02, 2013, 07:42:50 PM
what is the spacing on the heatsink mount holes of the h-board? It looks like they may be 37.5mm or so width&length
3537  Bitcoin / Hardware / Re: [ANN] US/North American Bitfury sales now open ***full prototype pics*** on: October 02, 2013, 07:41:56 PM
Well, 1st KnC's will be delivered to customers tomorrow.

Ugh.. waiting and watching,..lol

not looking forward to seeing the network break 2 peta / h. No not at all  Sad

If only it were just 2.  I bet by Nov 30th we are at 4-5 PH if KNC ships things on their current schedule.

whats the spacing on the heatsink mounting holes at the back? Ive seen some 37.4mm x 37.4mm heatsinks that seem very close (i measured about 37.5+/-2mm) but would hate to be off my half a millimeter and unusable
3538  Bitcoin / Mining / Re: Mining Contracts on: October 02, 2013, 05:38:01 PM
I looked at them when starting more because I could get XXXGhs going for much less startup.  After a while of research and reading into their hidden fees and the "reinvestment fees" and doing some math just doesn't make much sense to me.

Hidden fees and reinvestment fees? I haven't found these. Do go on!

cex.io is the cleanest ive seen, and right now has no fees other then electrical use. however, the price/GH is a bit high. 1GH is expected to produce 0.13-0.2 BTC in the forseeable future, and current price is around 0.24BTC

that said, this is an excellent way of pinning down a good market value for ASIC devices
3539  Bitcoin / Hardware / Re: Block Erupter Blade (Backplane +5 Blades) on: October 02, 2013, 03:12:31 PM
Hello!

I have just been delivered 1 Backplane + 5 BE Blade's

I have not got the "HP DPS 800GBA PSU"

And was wondering how you would wire a standard Corsair 850W PSU to the backplane that is provided.

Thanks to anyone who could help, I cannot find a guide anywhere for the backplane.

I am *guessing* that it would draw directly from your 12V line. however, your 850w PSU may only provide 650W over 12V, possible split between 2 rails. If 2 rails is the case, then you would need to wire both together or risk using more than the amperage provided to each individual rail.

Im assuming the backplane has an obvious spot to connect a +12V and GND lines
3540  Bitcoin / Mining support / Re: [GUIDE] BitFury Miner Support/Tuning on: October 02, 2013, 02:22:40 PM
Guys, I want to know who has the highest clock rates.   Does anyone have over 40GH/s per card or close to it?
 I was able to get about 43GH/s for 1 card.  Most cards run ~35-36GH/s though.  one runs 31 GH/s
Please post your epic results and if you have 35+ please post your resistor settings, if you used heatsinks and what other cooling you have.

It seems to be really board dependent but with a general resistor setting of about 1.15k I see anywhere from 30Gh/s up to 40. I am not using any heatsinks right now just 3x120mm fans blowing at them.

Cooling seems to be the factor for stability at the higher voltages as I have had stable boards start to lose hashrate and go to 0Gh/s and back again when temps go up, and even when they don't.  Wink

Hi All, which components seem to need the most cooling (obviously the chips need cooling, but are there other hotspots?) Is this loss of hashrate related to the voltage regulator overheating and shutting down (I think I remember reading somewhere that this could protect itself in this way)? If so, is the voltage regulator designed to loose heat through its top surface or through the board (as this will affect where we put a heatsink)?

I haven't been able to tell yet if the hashrate decreases because of the regulator or due to increased errors forcing the autotune to downclock the chips. I need to turn off autotune and see but considering the hardware cost I really don't play with it much.  Just keep hashing....just keep hashing. Grin

The regulator is very hot on the surface and not really hot at all on the backside. (finger test)  the chips are hot on both sides.

Great, thanks, so it sounds like it's worth us putting a heatsink on the top side of the regulator then (in addition to chip heatsinks). That's good to know.


I put 2 small heatsinks on my regulator and they get quite warm/hot weven with good airflow. chip voltage is around 0.834V once the resistor is up to temp (starts up from cold state at about 0.815V)

however, ive recently seen it go from 2-4hrs at 40+GH down to 20 for 5-15 minutes, then climb back again. autotune is off (most chips at 53/54) so i dont know if the board or the chips are behind the issue. voltage seems constant as far as i can tell
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