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Daily refund update: The following users still haven't provided any refund address to me or redphlegm. As always, if you've already contacted John K. then you should be ok, but you won't show up on my refund list. To show up on my refund list, please PM me with your preferred refund address. alle.sello
tromacca' *not real nick*
AmpEater
magixx
Hiroaki
shep80
ZeroPAiN
nebiz
456191
sun
strombom
bitrocket
The following users have provided addresses, but have not confirmed with me via PM. We've already discovered one fraudulent entry in redphlegm's form (since anyone can fill it out), so please verify that your address is indeed correct on my spreadsheet as an extra security measure. Egon
Kushedout
purplesquid
flowdab
CoinHoarder
wrenchmonkey
pierrejo
dancrn
Wesly
xbaby
davecoin
RayJay
ragmondo
BitHav
redphlegm
volosator
hugoooo
fmerli
tastycat
conv3rsion
Doomsby
salt
perseus
dgarrett
stannum
samurai1200
jordan314
zamazama
Also, anyone whose refund address I found on this thread in the last week were marked as "Posted" under the Confirm column. If you'd prefer to just post here, I'll pick that up too. Edit: Posting the URL to the refund sheet again just in case: https://docs.google.com/spreadsheet/ccc?key=0ApT7WUJuJCwMdEhFX2UxbF9Nd0xydmhnUUJiZVBLVlE&usp=drive_web#gid=3Edit2: Just went back a bit further and found some additional refund addresses posted in this thread. List updated. I just sent you a PM confirming my refund address |
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296 chips
Batch 5
9/12/2013
Not received
Chips only
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It's been 2 weeks since I requested a refund and have still received no communication or refund.
Same here I requested refund on the 12th and no sign of life from SB |
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Sent my request on the 12th. Still waiting for refund.
I have not received any confirmation of my request or notice to clarify anything (just in case of some bad or missing information).
....
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I see in last steamboat Post, that most of the refunds have been issued, but I have not received my refund.
I sent my request for refund on 09/12/2013 (Sent to: steamboat on: September 12, 2013, 07:18:11 PM).
Total amount of chips from Batch 5 to be refunded:
296 chips = BTC25.456 paid
Purchase (Paid) date June 5
Batch 5: Order #10553
How you have sent refund request? SB sent an google form for refund reqest where you need a sign an meassage with btc address what was used to transfer. If you did not do it asap. Find SB email in the inbox (check the spam folder too). You may pm me if you did not received it and I can send you the google form link. I sent my refund request following SB instructions and properly signed the email; Yes, I followed the instructions and filled the goggle form at the following address: https://docs.google.com/forms/d/1nT1HBU26UYQ_Ctev_mFLmBKKgYrtivLbcqWsabKpOGE/viewform In addition, I PM a copy of the information requested in the form and emailed to SB (twice). Still no answers. |
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I see in last steamboat Post, that most of the refunds have been issued, but I have not received my refund.
I sent my request for refund on 09/12/2013 (Sent to: steamboat on: September 12, 2013, 07:18:11 PM).
Total amount of chips from Batch 5 to be refunded:
296 chips = BTC25.456 paid
Purchase (Paid) date June 5
Batch 5: Order #10553
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I did not sell any chips I paid BTC3 for 37 chips (37.09 in the form) , my refund address is:
1NhSSrRW5Kqzki6TC2HVvHviEtQdxEBTeB
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Order update.
Chip amount: 296
Payment amount: 25.456
TX ID: 62aa52d60847496b1b05aa2ee4adb97552398017a6d6431fba87a15cd5386912
Email sent.
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Bithav, those are the Avalon blade boards, right? Is the microcontroller code available for those? I may just end up going that route...
Yes, they are. Code is available. |
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Bithav, those are the Avalon blade boards, right? Is the microcontroller code available for those? I may just end up going that route...
Yeah it is available. But if not, why going with a different board and writing your code? If I have to write the code, I would use a proven hardware.... |
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How can I get some sample chips? I need just a few to test the boards....
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Is that the size of the board including the psu part?, is it possible for you to measure the two parts separately?
There is an white line between the psu part, and the mining part, in my project I want to separate it there (I can't see the necessity of one for each 10 chips?)
PS: 37x48 mm Chips: 37x90 mm |
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Does anyone know the dimensions of the 10 chip Avalon ASIC module?
37 x 138 mm |
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Sounds nice. So you create one big board with 256 chips? How big would this pcb be? I guess you have a design where one broken chip doesnt take other down with it.
Only out of interest... if your design works would you sell it so that someone could create miners with it by making contracts with specialized companies?
The chips will be grouped on sets of 8, with independent power supplies. If 1 chip goes bad, that section will be shut down, without causing any additional problems. No, I will not sell the design. I will sell working units of 64 to 320 GHs/s. I am the specialized company.  |
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With 256 chips per board you can hash conservatively 64GHs/s per board. You can stack up to 5 of these boards together for over 320 Ghs/s per unit.
Worth to try...
And also each board could double as a pro grade waffle iron... Nah! We are talking here less than 2.5 KW (including PS losses). Currently I am wasting much more power in my mining rig and only achieving less than 3 GHs/s with 6 Radeon HD cards! I used to work for different companies as a design EE and I and used to handled power waste (heat losses) evacuation efficiently. So I know what I am talking about... |
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It seems nobody answered my question regarding a board with higher amount of chips so i will ask again.
Whats the best performance in regards to how many chips are on a pcb? I believ avalon is putting 16 on a pcb, burnin thinks about 20 chips. But i wonder wouldnt it be more efficient to make a big pcb with maybe 100 or 200 chips on it? Only one step to implement many chips, probably one power supply and so on.
I mean i see how many chips some people order. And i see the prices for "one board". I dont believe that a chip with 1000 chips would be cheaper at all because of the size that would drive the production cost into heights. But where is the optimum here? Burnin says 10 chips for 80€ and 20 for 100€. So its cheaper to build in more chips. Wheres the possible optimum?
I really think the one that develops this "cheapest" board will make a fortune. And the one that creates the biggest board will be friend of those that bought a batch on its own and dont want to have staying around 1000 miners with 10 chips each. The more units the more costs, the more needed connections and so on.
With such an order you might be better off asking one of the DIY PCB designers to work with you specifically for a larger board that would be more efficient in terms of components and power compared to smaller offerings if it is even possible. Can't see why it wouldn't. Or find someone to develop a design for you. There are sites where you can hire designers for this https://www.odesk.com/. With my design it will be possible to panellize multiple 10x10cm boards onto bigger ones. But it doesn't get much more economical to do that and you lose some modularity. A 20cm x 20cm board is quite reasonable and that would hold 4 modules with no extra design effort - just plunk the gerber files down 4x. And you end up with 64 chips / board. Or 20x30 would give you 80 chips, which is nice as it's about the same size as a sheet of paper, so still easy to work with. I should note if you panellize then you can leave off the usb connector except for one per big board. You would make an octopus PCIe power splitter joining one PSU lead to one big board, with 4 or 6 plugs. And a small 3 pin ribbon jumper to hop around the modules for I2C data. You guys are dead on the money. I am working my own design with 16X16 Avalon chips in a single board, using a PCI-ex4 interface, and the standard PCI-e 12V suplemental power as additional power source. If all the footprint is there (and much more powerfull) in an ATX motherboard, why bother building additional boards and interfaces as in the Avalon Design? With 256 chips per board you can hash conservatively 64GHs/s per board. You can stack up to 5 of these boards together for over 320 Ghs/s per unit. Worth to try... |
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PIN 20 of the board connector is 5 V input.
The complexity and cost of a Buck converter is too overwhelming for just a few miliwatts. Supposing 250 mA, times the voltage drop (5-3.3= 1.7 V) is a PD of .25*1.7 = 0.42W and I thing it is much less than that.
I just thought I'd throw a comment in here. In my case since I want to use PCIe power I won't have an easy 5V supply, without adding another cable. But also, the price difference between a buck and LDO isn't that significant for lower power use. With 12V input it's a better choice here. I was guessimating that each ASIC may use 25-50mA each. Probably it's just for I/O driving but it could also be used for something else (the PLL?, clock osc is 3.3V). Not being sure I went with the higher value. On a 10-16 chip board that would be 500-800 mA. At 12V we have (12-3.3) * 0.8 = 7W dissipated if using an linear reg. Now the one specified in Avalon is rated at 600mA AP7215 so we can guess he chose a suitable part for 10 chips. But that reg costs around $1.50 qty 10 @ Mouser. Using an MCP16321 we can have 12V input, rated 89% efficiency, gives 0.26W loss. An MCP16321 costs $1.55 qty 10, and you need a 4.7uH inductor that costs $0.27. So while at 5V it's feasible at 12V it's a bad idea even if you can get rid of the 7W heat. Of course, if you don't have 5V available, then the more efficient solution is what you are mentioning. The topology to get a solution is always an engineering decision, and you have good arguments. Here is a link to a possible solution that per TI webench cost only $1.32 (without PCB) in a pcb area of only 127 mm2. See details here: http://floridaposts.com/PDF/3.3V-1A-BuckConverter.pdfBitHav |
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@BitHav
Where you are getting 5V that is feeding the 3.3V LDO? USB?
If 3.3V is using any more than 250mA, I would consider using a buck regulator supplied by 12V as well. No need to create more heat with an LDO (however little in comparison).
PIN 20 of the board connector is 5 V input. The complexity and cost of a Buck converter is too overwhelming for just a few miliwatts. Supposing 250 mA, times the voltage drop (5-3.3= 1.7 V) is a PD of .25*1.7 = 0.42W and I thing it is much less than that. Ohh i see what youre saying... "the board" being the backplane of the avalon? Yeah, actually pin 20 in both boards... |
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@BitHav
Where you are getting 5V that is feeding the 3.3V LDO? USB?
If 3.3V is using any more than 250mA, I would consider using a buck regulator supplied by 12V as well. No need to create more heat with an LDO (however little in comparison).
PIN 20 of the board connector is 5 V input. The complexity and cost of a Buck converter is too overwhelming for just a few miliwatts. Supposing 250 mA, times the voltage drop (5-3.3= 1.7 V) is a PD of .25*1.7 = 0.42W and I thing it is much less than that. |
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