10BTC coming your way.
TX 2b9f18fdf3aacc6ae37102f8f083cec941d766d38fe921a32f6febec1819da6b

I know its not possible to edit coin addresses once created, but is it possible to add addresses? For example can we add a groupcoin to our existing accounts?

Sorry if this was asked before, Ive been using this pool for awhile but never read this thread.

Id guess this will stay open atleast until after the first dividend payment from the Alalon Group Buy.

That does make sense. The faster your hardware the higher difficulty the software will run at, lowering your bandwidth usage.

Thanks!

CH, I'll probably invest some. Let me see what I can gather up, spreading the risk is a good idea!

I know there was talk in the past about internet bandwidth while mining, hence the reason for new protocols. How much bandwidth does, say 1TH/s require even with Stratum/GBT? 1MB/s enough? 5MB/s? 20MB/s? etc....

On a slightly different note, how much data is transferred on a monthly basis for say 1TH/s?

1TH/s is just because its a nice round number on the high end of most users. Basically the max a user would use at this point...

*reserved*

Hey all!

Im a share holder of Coinhoarder's 7 Avalon group buy and am trying to model this after his professional/transparent approach. (I Hope he doesnt mind ) After hearing about Bitfury's working prototype and seeing the August delivery machines sell out in 24 hours I decided to start this group buy and get on board!

Im putting this group buy together for the Bitfury 400GH/s mining hardware. The units for August delivery are already sold out so this buy will be for October delivery. As soon as enough is collected I will place an order. If there is enough interest/capital a second unit can be purchased and then a third and so forth until either there is not enough funds for a final unit or I decide the power/space requirements are too much for me to handle. Any left over funds will be refunded.

All units ordered will be hosted in my home/and or in a secondary location if need be, however this has its drawbacks as it is 30+min away. The advantage I have over some others is my electricity is cheaper (around $0.06-0.07/kw). I also live in an area that does not experience extreme summer heat. Today reached a high of 81F with last nights low being 53F. This means A/C will not be needed as much to keep temps under control which also means less electrical cost. I estimate electrical cost to be about $20/month per 400GH/s unit. (note: this also is calculated based on Bitfury's estimate of 400watts per unit)

Each Bitfury is currently listed at $8000 for October delivery (https://megabigpower.com/shop/index.php?route=product/product&path=59&product_id=53) so at the current rate of about $100/BTC we need about 80BTC for our first unit.

Terms
What you're buying:
You are buying shares of one or more 400GH/s Bitfury miners.
1 BTC invested = 1/X portion of the profits from all mining units combined
(X being the total amount invested on all units)
Minimum investment of 3BTC at this time. (I may lower this later.)

Electrical cost will be subtracted from the months end dividend payments using the latest Mt Gox rate. Electrical cost includes the cost to run any mining units bought by the group as well as the use of A/C and/or fans to regulate heat.

I will charge a 3% hosting fee that will be deducted at month end as well as a 2% pool fee, unless an alternative is decided on by the group (P2pool is an option)

I can not and will not be held responsible for things out of my control. This includes such things as difficulty increase, BTC prices, Bitfury delays or failing to produce anything at all, etc. I will do anything in my power to make this successful for all involved but realize that things can happen. I plan on being a share holder as well and want this to ROI as much as the rest of you. This is risky, there are lots of new and powerful ASIC devices coming on the market, its very hard to get a reading on them all and guess what the difficulty might be. Bitcoin price is also an unknown and can not be accurately predicted. Do your own calculations and invest appropriately.   

Dividends will be paid monthly but can possibly be done on a bi-weekly bases depending on the total number of investors. Realize that I have a full-time job outside of the Bitcoin world so my time must be split.

You have the option to sell your shares to anyone at anytime, however I reserve the right to remove this option and or modify it as needed.

Who am I?
Ive been a member of this community since July 2012. I might not post as much as some but I like to think my posts have some value rather than "I agree!", "BTC PWNS!!!!", etc. I do spend a lot of time reading and tweaking my mining rigs. I started out with a single HD4850 mining and quickly bought some 5850's to convert my existing HTPC and main desktop both to dedicated mining rigs. Those both paid for themselves in a few months time and allowed me to buy some FPGAs. From there my ASIC adventure started... I traded my FPGAs in for bASIC's which ended badly. I have since switched my two rigs over to Litecoin, built two additional Litecoin rigs, and ordered ASICMiner USB Block Erupters from groupbuys here in the forum as well as shares of some Avalons. I wanted to buy BitFury did not see many options and thought I might be able to do better. So here I am... Im willing to answer questions as I know this is my first group buy.

If you are interested in investing, please send Bitcoins to: 1HCk6841vmsY567wiThNzvcij5VPj9nZc8
A minimum of 3BTC is required for investing, anything less will be sent back to the sender.
Only send from an address you control, you will need to be able to sign a message from that address in the event of a dispute.
Please reply to this thread with the amount of Bitcoin you wish to invest as well as the sending address. Dividends will be paid to this address unless otherwise specified.

Here are the prototype pics:
https://megabigpower.com/images/01-M-CARD.gif

https://megabigpower.com/images/02-M-CARD.gif

https://megabigpower.com/images/03-M-CARD.gif

Lets get hashing!

Thanks,
AmDD

I didnt see this posted anywhere. How is the rpi powered? Wall wart USB? Directly from the PSU with some molex-to-USB adapter? Or is it powered by the GPIO pins?

Maybe he should list which Group Buys qualify? I bought in Group 7 at just over 1BTC each, and again in 16/17 at under .5 each.

Low power usage and probably the biggest reason..... you can actually get them! Any other ASIC device out there has a 4+ month (1 year in some cases  ) wait time. You can order a Block Eruptor and have it in a few days.

Info Ive been looking for is:

Number of total coins (seen in OP)
Block solve time
Reward per block
Does the reward drop after XX blocks?

I did not see any bad caps or burnt components anywhere. The AS5 if anything was a bit thin so I added a bit more (areas of the chip had none at all).

Im 45min away from my rigs and wont be able to try the card until next weekend.

AmDD; 15; 7.2; 1M4Tt33dSqbkfm7hAhe6jJFpVZtgToFEaK

I'll check for bad caps/etc this evening.

Ive never had an issue with AS5 before, it is the only thermal paste Ive ever used and have been using it for years. I'll double check that too tho.

thanks for the info

The cards will not work in 3 different systems. (2 mining rigs and one gaming system). Each mining rig had a total of 4 cards (powered risers) and one card from each has stopped working. Removing these cards allows the remaining cards to function without issue. WHen these two cards are put in a gaming system they will typically boot the desktop but as soon as a game is launched it locks up.

The issue did start not long after the AS5 was applied, but it seems to happen too fast to be a heat issue I would think.

Ive got two video cards that have stopped working correctly. They lock up the system nearly as soon as cgminer starts. The cards are only a few months old, whats the process to return them under warranty? Im sure others have been down this road, im just looking for advice. The cards are Sapphire and were purchased from newegg.com.

EDIT: cards are Sapphire 7950's. Also I have replaced the stock thermal paste with AS5, will this void the warranty?

I would say it was probably a connection issue. Maybe the connection to pool 1 was slowed ( due to an issue with the pool server, network traffic, etc) and as a result the mining software reported some shares to pool 2.

while I know nothing about how that would actually work, i still dont think it would make it worth while.

Assuming 20 pi's would give you a result 20x faster, 20x the mining power of a single pi isnt much... Let me see if I can find stats on it...

EDIT: looks like the rpi can mine at less than 200kh/s. So 200kh/s x 20 is 4MH/s at max. Not exactly worth it considering a single Block Erupter USB miner can mine at 330+MH/s and uses the same power as a single rpi.

It would be a neat project and look cool but it would never be profitable.



http://www.zdnet.com/build-your-own-supercomputer-out-of-raspberry-pi-boards-7000015831/