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Author Topic: Ultra-Low-Cost DIY FPGA Miner - 175MH/s @ $1/MH  (Read 121671 times)
rph
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November 10, 2011, 06:39:52 AM
 #121

Why not release the circuit diagram?

IMO open source hardware (of this complexity) doesn't work economically. To build qty 1 would cost probably
$400+ due to the low-volume PCB fabrication, low volume BGA assembly (unless you do this yourself),
2-3X higher pricing on low qty parts orders, shipping costs from 3-4 different distributors, etc.

To get good $/MH you really need a single entity building the design in high quantity --
either an individual building a large 10GH/s+ rig, or a company willing to invest the capital and
accept the risk and customer support issues/etc to resell them in lower qtys.

-rph

Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
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rph
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November 10, 2011, 06:43:46 AM
 #122

Sneak peak at the next carrier..



-rph

Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
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November 10, 2011, 07:05:39 AM
 #123

What program is that?

Also, is that 1, or 4 FPGAs?
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November 10, 2011, 07:16:03 AM
 #124

Also, is that 1, or 4 FPGAs?

kicad, and 4 sockets for the FPGA modules.

-rph

Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
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November 10, 2011, 07:43:18 AM
 #125

Also, is that 1, or 4 FPGAs?

kicad, and 4 sockets for the FPGA modules.

-rph


Hmm... never heard of it /me adds to growing list of circuit building software

And... wow /nerdgasm

I really, really wish I had more disposable income, because something like this would be awesome to be able to support
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November 10, 2011, 11:15:49 AM
 #126

Why not release the circuit diagram?

IMO open source hardware (of this complexity) doesn't work economically. To build qty 1 would cost probably
$400+ due to the low-volume PCB fabrication, low volume BGA assembly (unless you do this yourself),
2-3X higher pricing on low qty parts orders, shipping costs from 3-4 different distributors, etc.

To get good $/MH you really need a single entity building the design in high quantity --
either an individual building a large 10GH/s+ rig, or a company willing to invest the capital and
accept the risk and customer support issues/etc to resell them in lower qtys.

-rph


I do not think we understand each other, to begin forgiveness for my English translator ...

Releasing the diagram to the research staff member, not that any company produce it.
There are some ideas that we could certainly provide interesting, your idea of ​​making an adapter between the chip and the motherboard seems very good but not larger than 4 FPGAs would be interesting to reduce the number of pins? or if not possible, it would be better aligned horizontally or use a vertical slot type?

I say this because I love to participate in the development of an FPGA cluster but I see that everyone develops their own hardware and not much collaboration.
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November 11, 2011, 05:14:00 AM
 #127

I say this because I love to participate in the development of an FPGA cluster but I see that everyone develops their own hardware and not much collaboration.

There was an open source FPGA miner effort, but it pretty much stalled when some of the
most talented contributors left & started their own project.

-rph

Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
rph
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November 15, 2011, 04:07:32 AM
 #128

A couple people asked about the PCB vendors I've been using -
here are the two main ones:

DorkbotPDX
Seeedstudio

Dorkbot uses a US fab, with gold-plating, extremely high quality, 2 wk turn, and they
have a 4-layer service, but they are pretty expensive for large boards.
I'll be using Seeedstudio for the carriers.

It's awesome to have two options for low cost, low vol PCBs now.

-rph

Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
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November 15, 2011, 04:34:50 AM
 #129

After some quality time with the Xilinx build tools, I'm up to 192MH/s in -3.
I think this is the second-fastest published result (about 8MH/s behind ztex).

I'm on track to have the cluster built in around 3-4 weeks. Would have been
like late Oct, but the business/sales side of buying the FPGAs took foreeeeeever.

-rph

Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
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November 15, 2011, 04:37:10 AM
 #130

After some quality time with the Xilinx build tools, I'm up to 192MH/s in -3.
I think this is the second-fastest published result (about 8MHz behind ztex)

I'm on track to have the cluster built in around 3-4 weeks. Would have been
like late Oct, but the business/sales side of buying the FPGAs took foreeeeeever.

-rph


smartXplorer   Grin

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rph
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November 15, 2011, 04:38:45 AM
 #131

smartXplorer   Grin

Indeed. But that only removes the last 20-30k of the timing score. The rest is attempting random
VHDL tweaks until you magically trigger an efficient placement. It is very time consuming work.

-rph

Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
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November 15, 2011, 04:47:42 AM
 #132

smartXplorer   Grin

Indeed. But that only removes the last 20-30k of the timing score. The rest is attempting random
VHDL tweaks until you magically trigger an efficient placement. It is really time consuming work.

-rph


my experience is manually limit the running time to less than 2hr, i discovered when the "magically table" has been triggered, the P&R will finish very fast. so a i7-2600 with 16GB ram can finish 0-100 table in 1-2days.  Grin


ADD:

but be careful, when you run @ 190 Mhz, the chip will easily to get over heat, any heat dissipation method form chip's top is useless . particularly you are using a 2 layers PCB.

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rph
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November 15, 2011, 05:08:18 AM
 #133

but be careful, when you run @ 190 Mhz, the chip will easily to get over heat, any heat dissipation method form chip's top is useless . particularly you are using a 2 layers PCB.

Yup, that is good advice. xpa gave me a max ambient of -47.4C with no heatsink. 21.6W with 50% toggle rate.  Shocked

-rph

Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
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November 15, 2011, 06:13:14 AM
 #134

so a i7-2600 with 16GB ram can finish 0-100 table in 1-2days.  Grin
Did you run 4 smartXplorer iterations on a same CPU taking advantage of the quad-core? Or a single iteration took 16GB of RAM to implement a single Spartan-6 design?

Please comment, critique, criticize or ridicule BIP 2112: https://bitcointalk.org/index.php?topic=54382.0
Long-term mining prognosis: https://bitcointalk.org/index.php?topic=91101.0
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November 15, 2011, 06:26:34 AM
 #135

so a i7-2600 with 16GB ram can finish 0-100 table in 1-2days.  Grin
Did you run 4 smartXplorer iterations on a same CPU taking advantage of the quad-core? Or a single iteration took 16GB of RAM to implement a single Spartan-6 design?

i run 5 smartXplorer iterations one time, and each take 2~2.5GB of RAM

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November 15, 2011, 01:59:22 PM
 #136

have you decided to sell these yet?

ngzhang
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November 15, 2011, 02:24:30 PM
 #137

have you decided to sell these yet?

MR. heavyb looks like seek for a fpga mining system for quite a while.  Grin

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November 15, 2011, 05:16:17 PM
 #138

i run 5 smartXplorer iterations one time, and each take 2~2.5GB of RAM
Thank you for your input. I resolved to stop using my 4GB RAM machines for any serious future work. Because of my stupidity I installed the FPGA design software on a laptop that cannot be upgraded beyond 4GB. I need to re-think my planned computer purchases.

This is a link for future reference:

http://www.xilinx.com/ise/products/memory.htm

I wish I read and understood it before I rushed to install the Design Suite.

Please comment, critique, criticize or ridicule BIP 2112: https://bitcointalk.org/index.php?topic=54382.0
Long-term mining prognosis: https://bitcointalk.org/index.php?topic=91101.0
rph
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November 16, 2011, 06:14:09 AM
 #139

have you decided to sell these yet?

If you're interested in a 10GH/s+ cluster - that could start to make sense - PM me and we can discuss.
I don't want FPGAs to become too widely available.. I want to compete with 45nm GPUs forever   Grin

-rph

Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
rph
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November 25, 2011, 06:53:29 PM
 #140



FPGA mining has come a long way since September.
Arsbitcoin needs to fix their service  Tongue but with multi-pool support it's not a big issue.
Thanks again to TheSeven for his awesome miner SW.

-rph


Ultra-Low-Cost DIY FPGA Miner: https://bitcointalk.org/index.php?topic=44891
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