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1  Economy / Games and rounds / Re: The Bitcoin Limbo Game, 0.1 BTC REWARD on: October 02, 2014, 07:11:18 AM

Confirmed. Thanks BurtW!
2  Economy / Games and rounds / Re: The Bitcoin Limbo Game on: September 22, 2014, 12:31:03 PM
I'll just post it on his behalf...

11cea-1h

1HgwzAJdu8r5h1pviriV7KGnqc6fUHNqiq

Code:
Your MinAddress must be less than 11cea
HESUI6voO5mpQPRPYbZinqi/+Xl3nnszgVFxeItBZrdyvqkPWpIvqUg9x3HMD3hyBuVd1S1jA+tazkuDOI88zJU=

Balance 0.1 BTC:

https://blockchain.info/address/1HgwzAJdu8r5h1pviriV7KGnqc6fUHNqiq


Its done I think. But wow, an old address there!

I think BurtW will post when it's done. He said sometime Monday.
3  Economy / Games and rounds / Re: The Bitcoin Limbo Game on: September 22, 2014, 06:30:09 AM
I'll just post it on his behalf...

11cea-1h

1HgwzAJdu8r5h1pviriV7KGnqc6fUHNqiq

Code:
Your MinAddress must be less than 11cea
HESUI6voO5mpQPRPYbZinqi/+Xl3nnszgVFxeItBZrdyvqkPWpIvqUg9x3HMD3hyBuVd1S1jA+tazkuDOI88zJU=

Balance 0.1 BTC:

https://blockchain.info/address/1HgwzAJdu8r5h1pviriV7KGnqc6fUHNqiq
4  Economy / Games and rounds / Re: The Bitcoin Limbo Game, 0.1 BTC REWARD on: September 19, 2014, 02:45:06 PM
BurtW, can you give us an exact deadline (date/time in UTC)? I'll probably have an older address in a couple days. (Sorry dooglus!)
5  Bitcoin / Hardware / Re: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING*** on: March 10, 2014, 09:55:50 PM
What would be a fair asking price for 9 PCI Hash cards and M board?

1.75 btc

I'd offer 2.25 BTC for that, if I was looking to buy more hardware.
6  Economy / Scam Accusations / Re: Unofficial BITMINE CoinCraft series 28nm ASIC miners thread on: March 09, 2014, 12:39:00 PM
Definitely. It'd probably take them a couple weeks just to respond to my email with return directions. And then after spending lots of money to ship from US to CH, what's their incentive to not put me at the back of the line behind all the other customers clamoring for their late orders.

I pointed Bitmine management to your post for clarification and got following official feedback.

This is a transport damage and covered by related insurance.

If the damage is cosmetic or easy to fix (like re-plugging cables or tighten screws), customers might want to give a try. Otherwise, please contact customer service to get the issue resolved. Support currently has a backlog for around 3 working days. Also, please document the damages with photos and provide them with your request for handling the insurance and improving the shipping process.


Thanks and good luck.


Thanks zefir for looking into that for us! It's good to know the official recommendation for these situations. Is the ~3 working day backlog for email replies, or shipping out replacement parts after they receive damaged ones?

In my case, I still think I can resolve the issues quicker myself, if I can get some info. I did find a couple small components missing, probably because of the loose heatsinks, numbers C98 on one module and C45 on another. I found the C45, though it was a bit damaged, and soldered it back in place. That module seems to work fine now, though I only ran it for less than 30 secs since it's missing heatsinks and I didn't want to fry the chips. The C98 is too tiny to have hope of finding, but interestingly, that module seems to run fine without it. Do you know, or can you find out, whether it's a bad idea to continue running it without C98? If so, can you tell me its specs so I can order it from Digikey?

As for the damage to the connectors between the modules and bus board, I managed to repair it successfully. Sorry I didn't take pictures of anything I did. But I do want to highly recommend that Bitmine add a support bar on top of the modules to prevent them wobbling during transit and even afterward. Just a simple narrow strip of metal as long as the case is wide, with screws through it into the top of each module's main heatsink, should stabilize the modules and prevent the damage I found related to that.

I doubt that would solve the problem of the small heatsinks falling off though. Does the thermal adhesive they're using just not stick to aluminum (or whatever the heatsinks are made of) well? At this point, I think all I have left to do is find a suitable/better thermal adhesive to put these back on. What about this one?:
http://www.arcticsilver.com/arctic_alumina_thermal_adhesive.htm
How important is it to have high thermal conductivity on top of the chips, vs through the board?


Dear Keefe,

I'm sorry to hear that you had such heavy damages caused by the mishandling of the package by the courier, could you please tell me if it was delivered with FedEx or UPS? We're having a few reports of seriously damaged packages with one of the two so I just wanted to double check.

As per your damages you are for sure covered by insurance so please send to our support team a few pictures of the damages so that we can claim them back to the insurance.

Of course if you can fix them at your side it's much better so you won't loose precious mining time so I can definitely say you that yes you can run the board without C98, that is just one of the many decoupling caps and it won't affect operations.

As per the heat sink we use a thermal glue that is rated for 22 N/mm2 (!!) so it makes me scared to hear that they have actually detached from your board, anyway yes the front heatsinks are critical even when running at nominal speed, so the best solution would be to get any kind of thermal glue as for example the one you've linked to, clean a bit the area and put them back on.

Please let me know if you need further assistance!



FedEx delivered my unit. But I'm not sure they should be blamed for a vulnerable design. Securing heavy modules on only one one side is asking for trouble, in my opinion.

Since I will most likely not be requesting exchange or repair, and since I already repaired the internal connector damages myself, do you still want pictures of the detached heatsinks and the dent on the corner of the case? I don't think the heatsinks fell off because of shipping. Even with the modules wobbling there was enough of a gap between them to prevent them hitting each other. So I suspect the glue was just not good. Or maybe the heatsinks weren't clean, preventing the glue from sticking to them? The heatsinks that fell off have very little of the glue on them; most of the glue stayed on the chips.

Thanks for confirming that C98 isn't critical.

I hope Arctic Alumina Thermal Adhesive is thermally conductive enough, as I'll only get one chance. That stuff is permanent.

I do have one more question: Some of the chip-top heatsinks that didn't fall off completely, appear to have come loose from some of the chips. This is most noticeable on the long ones that cover 4 chips each. I'm able to push one end around slightly, showing that the glue is no longer holding onto the chips on that end. So there's probably a slight air gap which would reduce the thermal conduction. But I'm afraid to try to pull the heatsink off so I can redo the glue, because it might break the chips that are still holding on. What do you think?
7  Bitcoin / Hardware / Re: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING*** on: March 09, 2014, 10:09:03 AM
I wouldn't buy Bitfury H-cards for more than $150 each currently.
8  Bitcoin / Hardware / Re: Bitmine list of orders - December 2013 delivery (batch 1) on: March 09, 2014, 07:56:27 AM
Username                 Order Number        Payment Date         Payment Type           Product             Hashrate         Destination           Date Shipped         Date Received
Keefe220x13 OctoberBitcoinCoinCraft Desk600 GH/sUnited States

Position in shipping queue: 18x
Estimated delivery date: "last week of December" as of Nov 8


On Mar 7, I received a 1TH Desk for this order. It was shipped Mar 3, but was delayed 2 days because of import paperwork.

Nice to hear that you received the miner!
Actually funny... I have also order number #220X, paid same day 13 Oct / BTC... so maybe delivery is nearby also here...

They emailed me the tracking number the morning of Mar 3. If you didn't get that, you should contact them.
9  Bitcoin / Hardware / Re: Bitmine list of orders - December 2013 delivery (batch 1) on: March 09, 2014, 03:38:19 AM
Username                 Order Number        Payment Date         Payment Type           Product             Hashrate         Destination           Date Shipped         Date Received
Keefe220x13 OctoberBitcoinCoinCraft Desk600 GH/sUnited States

Position in shipping queue: 18x
Estimated delivery date: "last week of December" as of Nov 8


On Mar 7, I received a 1TH Desk for this order. It was shipped Mar 3, but was delayed 2 days because of import paperwork.
10  Economy / Scam Accusations / Re: Unofficial BITMINE CoinCraft series 28nm ASIC miners thread on: March 08, 2014, 02:18:15 PM
Definitely. It'd probably take them a couple weeks just to respond to my email with return directions. And then after spending lots of money to ship from US to CH, what's their incentive to not put me at the back of the line behind all the other customers clamoring for their late orders.

I pointed Bitmine management to your post for clarification and got following official feedback.

This is a transport damage and covered by related insurance.

If the damage is cosmetic or easy to fix (like re-plugging cables or tighten screws), customers might want to give a try. Otherwise, please contact customer service to get the issue resolved. Support currently has a backlog for around 3 working days. Also, please document the damages with photos and provide them with your request for handling the insurance and improving the shipping process.


Thanks and good luck.


Thanks zefir for looking into that for us! It's good to know the official recommendation for these situations. Is the ~3 working day backlog for email replies, or shipping out replacement parts after they receive damaged ones?

In my case, I still think I can resolve the issues quicker myself, if I can get some info. I did find a couple small components missing, probably because of the loose heatsinks, numbers C98 on one module and C45 on another. I found the C45, though it was a bit damaged, and soldered it back in place. That module seems to work fine now, though I only ran it for less than 30 secs since it's missing heatsinks and I didn't want to fry the chips. The C98 is too tiny to have hope of finding, but interestingly, that module seems to run fine without it. Do you know, or can you find out, whether it's a bad idea to continue running it without C98? If so, can you tell me its specs so I can order it from Digikey?

As for the damage to the connectors between the modules and bus board, I managed to repair it successfully. Sorry I didn't take pictures of anything I did. But I do want to highly recommend that Bitmine add a support bar on top of the modules to prevent them wobbling during transit and even afterward. Just a simple narrow strip of metal as long as the case is wide, with screws through it into the top of each module's main heatsink, should stabilize the modules and prevent the damage I found related to that.

I doubt that would solve the problem of the small heatsinks falling off though. Does the thermal adhesive they're using just not stick to aluminum (or whatever the heatsinks are made of) well? At this point, I think all I have left to do is find a suitable/better thermal adhesive to put these back on. What about this one?:
http://www.arcticsilver.com/arctic_alumina_thermal_adhesive.htm
How important is it to have high thermal conductivity on top of the chips, vs through the board?
11  Economy / Scam Accusations / Re: Unofficial BITMINE CoinCraft series 28nm ASIC miners thread on: March 08, 2014, 11:58:36 AM
Surely Bitmine should immediately collect the faulty equipment so they can resolve and ship it back to you? $6000 doesn't pay for any support of any kind?

J



Given their record so far, my guess is that Keefe trusts his skills more than theirs.

Definitely. It'd probably take them a couple weeks just to respond to my email with return directions. And then after spending lots of money to ship from US to CH, what's their incentive to not put me at the back of the line behind all the other customers clamoring for their late orders.
12  Economy / Scam Accusations / Re: Unofficial BITMINE CoinCraft series 28nm ASIC miners thread on: March 07, 2014, 11:53:17 PM
Also, does anyone have a recommendation for something like the kill-a-watt for 240v circuits in the US?
13  Economy / Scam Accusations / Re: Unofficial BITMINE CoinCraft series 28nm ASIC miners thread on: March 07, 2014, 11:36:14 PM
My 1TH Desk arrived today, but it's damaged:
* The back-right-top corner of the case is slightly crushed, which is no big deal by itself.
* The 5 modules inside were wobbling side to side, which damaged the headers on the red connector board that supplies the data lines from the mainboard. Many of those header pins are bent, but I can probably bend them back.
* The corresponding socket on one of the modules is half broken off. All the solder joints one one side of that socket are broken, but I can probably resolder them, as the pads weren't pulled off.
* Some of the small heatsinks for the tops of the chips had fallen off two of the modules and were banging around in the case. I haven't yet found damage caused by that yet though. But how do I reattach those heatsinks? It looks like they were attached by thermal adhesive.

I think I can fix most of the damage myself, but what should I buy for reattaching those heatsinks to the chips?
14  Economy / Scam Accusations / Re: Unofficial BITMINE CoinCraft series 28nm ASIC miners thread on: March 06, 2014, 01:36:59 AM
Now FedEx wants me to fill out some FCC form:


I'll probably choose #7, since I have no way of knowing whether these units actually comply with FCC requirements. But what about someone receiving more than 3 units?
15  Economy / Scam Accusations / Re: Unofficial BITMINE CoinCraft series 28nm ASIC miners thread on: March 05, 2014, 07:33:43 AM
Update:
I ordered a 600GH Desk in October to be shipped to California USA, ship queue #188. Bitmine informed me Monday morning (Mar 3) that my order would ship soon, with 400GH extra hash power, so I assume I'll get a 1TH Desk. They provided the FedEx tracking number a couple hours later. FedEx contacted me Tuesday morning, asking me to fill out an importer form (tax id, etc) and tell them what materials the "desk" is made of and its country of origin. I replied Tuesday evening with the filled out form and told them it's a computer, not a desk, and that I don't know the country of origin, just that it ships from Switzerland. Delivery was originally expected Wed morning, but we'll see if that gets delayed because I didn't return the form right away. I'll let you guys know if I have to pay any taxes, and how well a 1TH Desk runs in the warm weather here.
16  Economy / Exchanges / Re: CampBX Coin Withdrawals Lost on: March 03, 2014, 07:13:23 AM
Then it does seem that most or all of the failed bitcoin withdrawals occurred around Feb 10-12. There are at least 7 people complaining about this on CampBX's facebook page, and CampBX acknowledged at least ~20.

I just did a small deposit and withdraw as a test, and everything went quickly as it should.
17  Economy / Exchanges / Re: CampBX Coin Withdrawals Lost on: March 03, 2014, 06:56:12 AM
They finally broadcast the withdrawal transaction, only 18 days late.

Have bitcoin withdrawals from CampBX been processing quickly (i.e. in minutes) recently or is this an ongoing problem with CampBX?
18  Economy / Exchanges / Re: CampBX Coin Withdrawals Lost on: March 02, 2014, 02:18:46 AM
A friend of mine tried to withdraw ~6.5 BTC from his CampBX account 17 days ago. CampBX apparently never broadcast the transaction to the bitcoin network, since blockchain.info doesn't see even an unconfirmed transaction. He submitted a support ticket the next day, and it has now been 16 days with no response.
19  Bitcoin / Hardware / Re: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING*** on: February 16, 2014, 02:08:07 AM
Yeah that's clearly Bitmain - aka antminer.

MBP is 3x as expensive as Bitmain, at least at the nominal speeds. 2x as expensive when overclocked. The Bitfury guys are way out of touch with the mining market now.
20  Bitcoin / Hardware / Re: [ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING*** on: February 12, 2014, 10:42:31 AM
^what about price adjustments in the MBP store?
lulz

double lulz,

We have 3 pages of cost adjustment questions and we get a reply about where he is going/meeting. With the btc price low now, antminer is better choice by a huge margin. 400 for 35gh +controller or 750 for 180gh standalone machine, tough choice right?
Yes indeed Smiley

Aside: Hmm - so why does my BA fury board do 40.1GH/s paid to the pool?
What's up with the ones made by the guys here?
(or is that something to do with my cgminer driver?)
Yes these are real questions ... I've only had access to a small number of BA fury boards and basically no access at all to the boards listed here.
So I've no idea if my driver needs more work to support a lot of boards (yeah there really isn't much CPU power in an RPi) or if something else is going on.
I guess I need to spend some time on a large BA fury setup and work out what's going on with these crappy performance figures reported for the hardware here.
Then once I'm sure cgminer performs well with lots of boards, then the question here will be why on earth the boards here are rated so low.

What voltage do the BA boards run at? My best MBP boards can get just over 40GH when the weather's cool. But the main bottleneck seems to be the voltage regulator. Most of my boards are overvolted to around 0.86v, and the speeds are set just below where the regulator would cut out due to overcurrent/temp. At 0.86v, they could usually be clocked higher before getting too many errors, if it weren't for the current limit. I can determine that by turning off a couple chips and clocking higher until the errors start. Do the BA boards have a higher current limit than 30A?
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