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jimrome
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July 17, 2013, 01:59:39 AM |
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For 0.65V you need exactly 1K resistor for R01F.
For 0.70V you need 1.5K.
With 1K resistor I get 1.26Amps @ 12.0 V, so 15Watts for an h-board.
[edit] Remember, with 16 chips, soldering that higher value resistor will quickly max out the amps that the regulator can handle.
Perfect. Thanks Dave! My heatsinks are ready |
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A Meteorite
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July 17, 2013, 02:06:25 AM |
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For 0.65V you need exactly 1K resistor for R01F.
For 0.70V you need 1.5K.
With 1K resistor I get 1.26Amps @ 12.0 V, so 15Watts for an h-board.
[edit] Remember, with 16 chips, soldering that higher value resistor will quickly max out the amps that the regulator can handle.
Perfect. Thanks Dave! My heatsinks are ready You should post a how to and the results of your mod after you've done it. I know I'll be interested.  |
BTC: 1MeTeorfxZNsY6gJDBtrF8JA8KEv6SKGUmLTC: Lejxgou6hUkjupF6RoruxJGG9AQ7t3ovYt |
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buzzdave (OP)
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Sr. Member
 Offline
Activity: 472
Merit: 250
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July 17, 2013, 02:14:23 AM |
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For 0.65V you need exactly 1K resistor for R01F.
For 0.70V you need 1.5K.
With 1K resistor I get 1.26Amps @ 12.0 V, so 15Watts for an h-board.
[edit] Remember, with 16 chips, soldering that higher value resistor will quickly max out the amps that the regulator can handle.
Perfect. Thanks Dave! My heatsinks are ready You should post a how to and the results of your mod after you've done it. I know I'll be interested. Its been done a few times with the single-chip test adapter. Someone got over 3Gh/s out of it. Not sure where that thread is now, but it involved a heatsink (on *top* of the chip) and a pretty aggro fan. I think we will start to see hotter M-board compatibles in the near future. |
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jspielberg
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July 17, 2013, 02:41:22 AM |
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For 0.65V you need exactly 1K resistor for R01F.
For 0.70V you need 1.5K.
With 1K resistor I get 1.26Amps @ 12.0 V, so 15Watts for an h-board.
[edit] Remember, with 16 chips, soldering that higher value resistor will quickly max out the amps that the regulator can handle.
Perfect. Thanks Dave! My heatsinks are ready You should post a how to and the results of your mod after you've done it. I know I'll be interested. Its been done a few times with the single-chip test adapter. Someone got over 3Gh/s out of it. Not sure where that thread is now, but it involved a heatsink (on *top* of the chip) and a pretty aggro fan. I think we will start to see hotter M-board compatibles in the near future. That is pretty great that just replacing the backplane allows for some overclocking potential. |
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LaserHorse
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July 17, 2013, 03:23:32 AM |
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For bare chip buyers, we provide design files for Bitfury's single chip test adapter, which has schematics and instructions, as well as the reference design for the M & H boards we sell.
Dave - Can you confirm the single chip test adapter requires no onboard microcontroller/firmware programming? Apologies if this has been mentioned prior … EDIT: aah nevermind - I can see now that the RPi is being used to directly handle all the SPI stuff. |
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buzzdave (OP)
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Sr. Member
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Activity: 472
Merit: 250
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July 17, 2013, 07:46:09 AM |
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For 0.65V you need exactly 1K resistor for R01F.
For 0.70V you need 1.5K.
With 1K resistor I get 1.26Amps @ 12.0 V, so 15Watts for an h-board.
[edit] Remember, with 16 chips, soldering that higher value resistor will quickly max out the amps that the regulator can handle.
Perfect. Thanks Dave! My heatsinks are ready You should post a how to and the results of your mod after you've done it. I know I'll be interested. Its been done a few times with the single-chip test adapter. Someone got over 3Gh/s out of it. Not sure where that thread is now, but it involved a heatsink (on *top* of the chip) and a pretty aggro fan. I think we will start to see hotter M-board compatibles in the near future. That is pretty great that just replacing the backplane allows for some overclocking potential. Not quite j - the regulator and input voltage resistor are on each H-card. These are the bits you would focus on. If its not obvious to everyone already, if you play around with OC and kill your boards, don't come cryin' ta me... |
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||bit
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July 17, 2013, 09:22:45 AM |
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Dave. When will you accept bitcoin payments?
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regular
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July 17, 2013, 12:08:49 PM |
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Hi Dave,
Any possibility of 400 GH being only the floor? I'm asking as October delivery is a long time away and with the other asic manufacturers out there (BFL, Avalon and their chip sales, ASICMINER and their petahash goal by the end of the year, KNC Miner expecting to ship in September, and of course your 100TH project), someone buying your full kit now is still an extremely large gamble. I was wondering if process improvements on the October batch will be made and allow faster speeds. Thanks!
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-Redacted-
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July 17, 2013, 12:57:52 PM |
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Dave. When will you accept bitcoin payments?
He already does. Select Bank Draft as method of payment and add a note that you want to pay in Bitcoins. They will send you a Bitcoin Bitpay invoice. |
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||bit
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July 17, 2013, 01:26:37 PM |
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Dave. When will you accept bitcoin payments?
He already does. Select Bank Draft as method of payment and add a note that you want to pay in Bitcoins. They will send you a Bitcoin Bitpay invoice. Thanks for the heads up on that. It sounds familiar... maybe I read that in this thread  Another question for Dave: On the megabigpower.com website, one image of the asic chip has print stamped on it that reads 5GHash. The 16 chip hashing board has a product code "BF-25GHB" - seems to indicate it is 25GHash board. The starter boards apparently w/ 16 chips are 25GH. 16 chips x 5GHash/chip = 80 GHash. Why is the product code indicating a 25GH board, and all the other boards are 25GH boards? What did I miss? ||bit |
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zurg
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July 17, 2013, 01:27:57 PM |
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Dave. When will you accept bitcoin payments?
He already does. Select Bank Draft as method of payment and add a note that you want to pay in Bitcoins. They will send you a Bitcoin Bitpay invoice. Thanks for the heads up on that. It sounds familiar... maybe I read that in this thread Another question for Dave: On the megabigpower.com website, one image of the asic chip has print stamped on it that reads 5GHash. The 16 chip hashing board has a product code "BF-25GHB" - seems to indicate it is 25GHash board. The starter boards apparently w/ 16 chips are 25GH. 16 chips x 5GHash/chip = 80 GHash. Why is the product code indicating a 25GH board, and all the other boards are 25GH boards? What did I miss? ||bit They already said that it's the name of the chip, not it's performance. |
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||bit
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July 17, 2013, 01:43:58 PM
Last edit: July 17, 2013, 01:54:40 PM by ||bit |
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Dave. When will you accept bitcoin payments?
He already does. Select Bank Draft as method of payment and add a note that you want to pay in Bitcoins. They will send you a Bitcoin Bitpay invoice. Thanks for the heads up on that. It sounds familiar... maybe I read that in this thread Another question for Dave: On the megabigpower.com website, one image of the asic chip has print stamped on it that reads 5GHash. The 16 chip hashing board has a product code "BF-25GHB" - seems to indicate it is 25GHash board. The starter boards apparently w/ 16 chips are 25GH. 16 chips x 5GHash/chip = 80 GHash. Why is the product code indicating a 25GH board, and all the other boards are 25GH boards? What did I miss? ||bit They already said that it's the name of the chip, not it's performance. That's odd. Wonder how that happened. Maybe, they pulled a BFL in their design plan :/ But no worries... as long as they have good performance to price, that's all that really matters. If they have better power efficiency than BFL, that will be a bonus. |
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flyboy
Member
Offline
Activity: 76
Merit: 10
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July 17, 2013, 02:52:41 PM |
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I just purchased 2 October full kits, Will one PSU be able to power both, and how do I get the PSU to turn on without being connected to a monther board?
thanks!
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tom99
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July 17, 2013, 03:30:16 PM |
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I just purchased 2 October full kits, Will one PSU be able to power both, and how do I get the PSU to turn on without being connected to a monther board?
thanks!
yes, you are going to buy 1kW or more for psu will do it or better get more then later you can OC on it. |
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-Redacted-
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July 17, 2013, 04:22:58 PM |
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... how do I get the PSU to turn on without being connected to a monther board?
thanks!
This was answered in depth back a couple of pages, complete with pictures. |
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-Redacted-
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July 17, 2013, 04:30:05 PM |
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That's a really cool link. Definite add-to-my-bookmarks kind of thing. |
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davecoin
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July 17, 2013, 11:39:22 PM |
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Dave, I sent an email to support and haven't received a reply yet, so I'll ask here as well.
My lease is up soon and I plan on moving the first week of October. Will you provide a process for changing the shipping address to accommodate this issue?
Thanks,
Dave
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jmaccoin
Newbie
Offline
Activity: 43
Merit: 0
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July 17, 2013, 11:45:03 PM |
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So there are chips that are still available to order and will be shipped this week?
Inconceivable.
Is the CAD file for the h-card available?
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buzzdave (OP)
VIP
Sr. Member
Offline
Activity: 472
Merit: 250
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July 17, 2013, 11:45:54 PM |
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Dave, I sent an email to support and haven't received a reply yet, so I'll ask here as well.
My lease is up soon and I plan on moving the first week of October. Will you provide a process for changing the shipping address to accommodate this issue?
Thanks,
Dave
As long as the request to change addresses comes from the email address of the account that owns the order. |
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