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Also there are pictures of several different devices. Different PCB, different cooling - it looks like pictures randomly downloaded from the net.
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Despite delay in production process I must recommend marto74. I have ordered several units. All of them are of excellent quality, and fully working. Also contact was very good all the time (PM/mail response in max 24h).
Units came safely packaged with security tape all around the box. All of them exceed promised hashrate by +8-12%.
I am sure I will place another order.
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I have placed order #100000190 on 5th of December. I was hoping it will be shipped immediately (Xmas presents). When I should expect to get tracking number?
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makes no sense to order 30 GH for 850 EUR + VAT , it will never make ROI , unless BTC will double its value ...
the ugliest part here is, that WE KNOW these boards cand be sold for 250 EUR - 300 EUR, with profit included for manufacturer, and now they just added a extra 600 EUR for them ... dissapointed, if it this was BFL, i would understand ...
H-cards would also make good profit for manufacturer if sold for less than 50 EUR. But it this oldest law of market. Supply and demand. |
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You would have to find friend that runs business in EU with valid EU VAT number. He will then buy it without VAT, and can send it to you with lower value declared. But he might be in trouble if government tax department asks him where is his device.
Unless you will leave him with box of fans to show if anyone asks :-)
Best idea is to buy it as EU VAT registered company and let it mine here, in EU. But remember that our energy prices are large as hell.
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7950 MSI working on 690 Mhs  That is a good hashrate for a 7950, is it a twin frozr card? Although I think you would do a lot better on LTC, especially if you can maintain 690kh/s  No it is not twin frozr card that is the point I am mining LTC and it goes 690 + They are outside and i dont have a temperature problem They are this card then, the one fan model? Can you please share your settings? I can't get anything more than 600kh/s from these cards! yes this is a model. Tell me why would i share the settings so the other ppl can see my settings and automacly hash rate will gonna jump with theese card and difficulty also. I will share with you for 1 BTC and if you cant get 690 Mhs from each card i will give you back 1 BTC If not other people that shared their knowledge of BTC/LTC you would not even know that mining exist. You are probably one of those greedy bastards that would not give back lost wallet to older lady, saying: "Tell me why would I give it back, if she was so old and stupid to lose it?" |
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Minute ago I have received PM from "supernatural" with link to: http://bticointakl.my-board.org/1/Login.htmBe careful where you mine and exchange bitcoins for money. Most mining pools are a scam, bitcoin exchanges too(they will hold your money for months), look in the scammers section and see for yourself bitconitalk.org/index.php?board=83.0 I believe his account might be hacked. Probably many users received similar PM, sent to stated: (Undisclosed recipients). EDIT: Probably wrong board. Mod, please move it where it should be. I was in hurry to warn others. |
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How long does it currently take to verify an account?
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Also why would one sell so much when it could generate so much @ current rate.
Simple. He will sell only for more then he believe it will ever mine, You will buy only for less then you believe it will ever mine. |
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Do you think it's a good idea to do preorders on this new hardware or should I list it on the site when they're ready to ship?
Your shipping history is confirmed to be of very high standards. So I would not mind preorders. In fact it might even be a better option. It would allow me to be prepared for setting up the miners (calculating energy, space and cooling needed to run them). Few h-boards can be set up in no time, but even medium-large order takes some time to get online. Maybe half stock as preorders and other half as "off the shelf" shipping when ready? |
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Are there any confirmed information about Burnin selling his boards, or I should not wait for reply and place order somewhere else?
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Burnin, please check PM inbox.
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All ASIC for Bitcoin do a double SHA256 hash on an arbitrary 64 byte long string. But I believe it might be possible to design Bitcoin ASIC that allows also computing only single SHA256 hash.
Firmware would decide if ASIC is returning SHA256(SHA256(x)) or SHA256(x) value. It would allow to create much more versatile devices.
Question is, did any of current ASIC manufacturers done it already? Would such design be much less efficient (J/Gh) and have lower performance (Gh/s)?
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Can H-boards still be bought?
Hopefully in few days. |
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EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans!
Does the backside of the regulator even get hot? I have felt the top of the chip and its very hot but I don't feel much on the backside. Wouldn't putting a small heatsink on the chip do more? For the hashing chips those thermal vias work well as even touching the vias themselves gets hot, even better with a heatsink. Yes, it gets quite hot. I believe they are also constructed do dissipate the heat to the board, but I did not do any research in that matter. In my opinion the regulator heatsink is much more important than chip heatsinks. |
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At what voltage would the chips be ruined if not actually mining and producing heat, such as with the chainminer process shut down? Is .895v where it just gets too hot, or where stuff starts shorting internally?
Sometimes graphite changes resistance after several hours of hashing in high temps. When voltages gets over 0.880 (measured between caps) on regular H-cards, they start to slow down. After 0.900V they slow down even further (5-15 ghs per card), until they shutdown completely. In my setup cards shutdown immediately when fired up over 0.950V. At one time I was able to measure 1.028V! The card shut down but after "repenciling" it got back to hashing as always :-) Also there are differences between cards, I got one that runs ok. even at 0.930V. I've got one 12 cards to experiment on. Second rig runs currently untouched. EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans! |
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