Bitcoin Forum
December 06, 2016, 12:15:41 PM *
News: Latest stable version of Bitcoin Core: 0.13.1  [Torrent].
 
   Home   Help Search Donate Login Register  
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 [33] 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 »
  Print  
Author Topic: X6500 Custom FPGA Miner  (Read 208058 times)
N.Olmos
Full Member
***
Offline Offline

Activity: 164



View Profile
February 27, 2012, 11:04:55 PM
 #641

This. I think.



http://www.newegg.com/Product/Product.aspx?Item=N82E16835999020

Refer friends and earn 25%!

http://offers.coinad.com/?r=3
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1481026541
Hero Member
*
Offline Offline

Posts: 1481026541

View Profile Personal Message (Offline)

Ignore
1481026541
Reply with quote  #2

1481026541
Report to moderator
tgmarks
Donator
Hero Member
*
Offline Offline

Activity: 490


View Profile
February 28, 2012, 01:00:12 AM
 #642

Those things are sweet, i'm totally trying a set of those out.

99Percent
Full Member
***
Offline Offline

Activity: 179



View Profile
February 29, 2012, 02:17:13 AM
 #643

I was able to drastically reduce the rate of invalids by removing the heatsinks, scrapping clean the white adhesive and using gasoline, and the apply thermal paste (I couldn't quickly find thermal epoxy here in Mexico) and then gently press the heatsinks back on.

I think TheSeven is right about the nasty plastic packaging of the FPGA, it is the major bottleneck for its heat to dissipate. Isn't this chip available with a metal top?
Vanderbleek
Full Member
***
Offline Offline

Activity: 227


View Profile WWW
February 29, 2012, 02:30:36 AM
 #644

I don't see one available on digikey -- Xilinx might be able to cook something up, but I'm willing to bet it would cost quite a bit.

If I helped, feel free to donate to:
BTC: 1DimPUBPnmZuWu5XrMa3xVnFgMz1iGBNdr
LTC: LLqQuvRZd4uZyenER2mE8d3ns1N1qBWQjD
ZodiacDragon84
Sr. Member
****
Offline Offline

Activity: 266


The king and the pawn go in the same box @ endgame


View Profile
February 29, 2012, 02:43:13 AM
 #645

I was able to drastically reduce the rate of invalids by removing the heatsinks, scrapping clean the white adhesive and using gasoline, and the apply thermal paste (I couldn't quickly find thermal epoxy here in Mexico) and then gently press the heatsinks back on.

I think TheSeven is right about the nasty plastic packaging of the FPGA, it is the major bottleneck for its heat to dissipate. Isn't this chip available with a metal top?

Liquid nitrogen bath for hashing...lol

Looking for a quick easy mining solution? Check out
www.bitminter.com

See my trader rep at Bitcoinfeedback.com
!
fizzisist
Hero Member
*****
Offline Offline

Activity: 720



View Profile WWW
February 29, 2012, 08:00:13 AM
 #646

I was able to drastically reduce the rate of invalids by removing the heatsinks, scrapping clean the white adhesive and using gasoline, and the apply thermal paste (I couldn't quickly find thermal epoxy here in Mexico) and then gently press the heatsinks back on.

I think TheSeven is right about the nasty plastic packaging of the FPGA, it is the major bottleneck for its heat to dissipate. Isn't this chip available with a metal top?

Glad to hear you got it working better! Is the heatsink then attached to the PCB in some way? I don't think the thermal grease will hold onto it very well (for long at least). Or maybe I misunderstood what you used...

Nope, no metal packages available for the Spartan 6 FPGAs, unfortunately. Looking at the published thermal specs for these FPGAs (UG385, page 341), though, I don't think the case is that bad. Obviously metal would be better, but we're just trying to move less than 10 W here. In rough numbers, keeping the thermal resistance from case to ambient under about 5 degC/W should be good enough. This is possible with the stock heatsinks and a good fan next to the board. The key then is that we have two parallel thermal paths: through the case and through the PCB. Adding those in parallel means that the total thermal resistance from junction to ambient is reduced a lot. This is why airflow over the board itself is very helpful! If you want to eliminate whole board airflow, you need to drastically reduce the thermal resistance of the heatsink.

allinvain
Legendary
*
Offline Offline

Activity: 1988



View Profile
February 29, 2012, 08:49:28 AM
 #647



Hi. Where did you get that enclosure, and what is it exactly, a hdd enclosure? (model number, etc) I'd like to get one too.

Edit: oops, did not realize someone that someone already asked the same question. Sorry for the redundancy. Maybe you missed his reply as well though.

Thanks.

c_k
Donator
Sr. Member
*
Offline Offline

Activity: 242



View Profile
March 01, 2012, 09:45:57 AM
 #648

They look like motherboard bus heatsink/fan combos from xilence, 40mm I think?

abbeytim
Sr. Member
****
Offline Offline

Activity: 333


View Profile
March 01, 2012, 12:15:45 PM
 #649

no offense but shouldnt this be in the mining hardware thread

or are you actually selling these cause when i checked cablesaurus they say sold out
abbeytim
Sr. Member
****
Offline Offline

Activity: 333


View Profile
March 01, 2012, 12:17:41 PM
 #650

http://cablesaurus.com/index.php?route=product/product&path=10&product_id=56 theres the link says out of stock
SamHa1n
Member
**
Offline Offline

Activity: 67


View Profile
March 01, 2012, 12:35:21 PM
 #651

Heatsink/fans are 40mm xilence that originally came stock on ztex fpga boards. Had to mount with epoxy. Removing the stock sinks was rather easy, considering that one just fell off by itself when the board was being lightly handled.

Standard 3.5" external 5 drive enclosure. Replaced the stock 120mm back fan with a variable speed liquid bearing fan. Each board is mounted to 2.5" -> 3.5" drive adapter tray.

PSU is 90W Pico unit

The digital readout is a 4 channel fan controller / temp sensor.

Around $100 of parts, give or take... 
tgmarks
Donator
Hero Member
*
Offline Offline

Activity: 490


View Profile
March 01, 2012, 06:06:43 PM
 #652

Well done, throw a panel on the front around your digital readout and thats a nice little unit.

fizzisist
Hero Member
*****
Offline Offline

Activity: 720



View Profile WWW
March 02, 2012, 12:20:01 AM
 #653

no offense but shouldnt this be in the mining hardware thread

or are you actually selling these cause when i checked cablesaurus they say sold out

Yes, we are actually selling these, but they are temporarily out of stock. I agree though, this doesn't really seem like the right place for this, along with all the old GPUs. Also, the thread has really become more of a place to discuss and get help, not a venue for buying and selling. Anyone object to a move to Bitcoin > Mining > Hardware?

Also, SamHa1n, very nice!

cypherdoc
Legendary
*
Offline Offline

Activity: 1764



View Profile
March 02, 2012, 12:59:34 AM
 #654

no offense but shouldnt this be in the mining hardware thread

or are you actually selling these cause when i checked cablesaurus they say sold out

Yes, we are actually selling these, but they are temporarily out of stock. I agree though, this doesn't really seem like the right place for this, along with all the old GPUs. Also, the thread has really become more of a place to discuss and get help, not a venue for buying and selling. Anyone object to a move to Bitcoin > Mining > Hardware?

Also, SamHa1n, very nice!

i've been thinking the same thing.  you need to move this to Hardware. 
TheSeven
Hero Member
*****
Offline Offline

Activity: 504


FPGA Mining LLC


View Profile WWW
March 02, 2012, 01:00:46 AM
 #655

i've been thinking the same thing.  you need to move this to Hardware. 

+1

My tip jar: 13kwqR7B4WcSAJCYJH1eXQcxG5vVUwKAqY
cypherdoc
Legendary
*
Offline Offline

Activity: 1764



View Profile
March 02, 2012, 01:02:53 AM
 #656

i've been thinking the same thing.  you need to move this to Hardware. 

+1

do you have a sense about how widely MPBM is being adopted?  are you pleased with its functionality?
TheSeven
Hero Member
*****
Offline Offline

Activity: 504


FPGA Mining LLC


View Profile WWW
March 02, 2012, 10:40:09 PM
 #657

i've been thinking the same thing.  you need to move this to Hardware. 

+1

do you have a sense about how widely MPBM is being adopted?  are you pleased with its functionality?
I'd estimate that there are around 10-30 installations right now, and no, I'm not really pleased with it's functionality yet.
It probably outperforms the standalone software solutions from the FPGA board vendors, but is nowhere near where I want it to be.
This is why I'm currently rewriting it from the ground up, for both better performance and greater flexibility. The new version won't have a configuration file any more, instead it will be configured through a web interface.

My tip jar: 13kwqR7B4WcSAJCYJH1eXQcxG5vVUwKAqY
cypherdoc
Legendary
*
Offline Offline

Activity: 1764



View Profile
March 02, 2012, 10:43:18 PM
 #658

i've been thinking the same thing.  you need to move this to Hardware. 

+1

do you have a sense about how widely MPBM is being adopted?  are you pleased with its functionality?
I'd estimate that there are around 10-30 installations right now, and no, I'm not really pleased with it's functionality yet.
It probably outperforms the standalone software solutions from the FPGA board vendors, but is nowhere near where I want it to be.
This is why I'm currently rewriting it from the ground up, for both better performance and greater flexibility. The new version won't have a configuration file any more, instead it will be configured through a web interface.

any estimate of when the rewrite might be ready?
TheSeven
Hero Member
*****
Offline Offline

Activity: 504


FPGA Mining LLC


View Profile WWW
March 02, 2012, 11:52:09 PM
 #659

any estimate of when the rewrite might be ready?

If things go well, this will be another couple of weeks of coding time until it is somewhat working, another couple of weeks until it works reasonably well.
I have exams coming up though, so I sadly won't have time to work on this full time. So if I don't manage to finish this really soon, it'll probably have to wait until after the exams, which means that it might take until around the end of May.

My tip jar: 13kwqR7B4WcSAJCYJH1eXQcxG5vVUwKAqY
kjlimo
Legendary
*
Offline Offline

Activity: 1498


View Profile WWW
March 03, 2012, 01:01:10 AM
 #660

any estimate of when the rewrite might be ready?

If things go well, this will be another couple of weeks of coding time until it is somewhat working, another couple of weeks until it works reasonably well.
I have exams coming up though, so I sadly won't have time to work on this full time. So if I don't manage to finish this really soon, it'll probably have to wait until after the exams, which means that it might take until around the end of May.
any estimate of when the rewrite might be ready?

If things go well, this will be another couple of weeks of coding time until it is somewhat working, another couple of weeks until it works reasonably well.
I have exams coming up though, so I sadly won't have time to work on this full time. So if I don't manage to finish this really soon, it'll probably have to wait until after the exams, which means that it might take until around the end of May.

What exams are you talking about?  College, CPA, actuary?

CampBX for buying BTCs, Coinbase for selling BTCs or Vircurex or Cryptsy for trading alternate cryptocurrencies like DOGEs

PM me with any questions on these sites!  Happy to help!

Bitcoin Poker at Seals                  Strike Sapphire Casino  Free games every hour & day!
  Get Free Bitcoins here.

Spondoolies-Tech or KnC Miner for the fastest mining hardware available!

Bitpay to help your business accept bitcoin payments!
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 [33] 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 »
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!