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Author Topic: Algorithmically placed FPGA miner: 255MH/s/chip, supports all known boards  (Read 109610 times)
Inspector 2211
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July 26, 2012, 07:17:55 AM
 #681

With lots and lots of $9 JTAG cables.   Roll Eyes

Inspector,

do you need some kind of jtag hub? I mean, on one side we have the jtag connector, but on the other side?

spiccioli

USB typically.
Back in the old days, they used to hook up JTAG controllers to the parallel printer port...
<wanders off into the distance, muttering about the old days when JTAG ports were still hooked up to LPT1: and a gallon of gasoline cost less than a buck>
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spiccioli
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July 26, 2012, 07:26:51 AM
 #682

With lots and lots of $9 JTAG cables.   Roll Eyes

Inspector,

do you need some kind of jtag hub? I mean, on one side we have the jtag connector, but on the other side?

spiccioli

USB typically.
Back in the old days, they used to hook up JTAG controllers to the parallel printer port...
<wanders off into the distance, muttering about the old days when JTAG ports were still hooked up to LPT1: and a gallon of gasoline cost less than a buck>

Thanks for clarifying, I've never used a jtag port Smiley

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July 26, 2012, 07:44:00 AM
 #683

How am I supposed to run a cluster over JTAG?

With a bunch of JTAG cables, of course!

Perhaps I misunderstood the question?

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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July 26, 2012, 07:56:23 AM
 #684

on the ztex singles the jtag pots needs to be soldered on at first. At least on my boards this jtag port is not populated Smiley

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July 26, 2012, 08:18:05 AM
 #685

on the ztex singles the jtag pots needs to be soldered on at first.

The 1.15y (four-chip) boards have it -- it's the black thing between the upper two chips in this image:



On the earlier boards I guess he forgot to solder it on.  You can order it from him; he calls it "the debug kit".

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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July 26, 2012, 08:21:32 AM
 #686

Yes they have one  (theres a second one i think too named CON 4)

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July 26, 2012, 08:27:22 AM
 #687

Has anyone actually managed to run TML on Ztex 1.15y (quad) board?

I already spent 100€ on fans, stacking pillars and underside heat sinks for my Ztex 1.15x cluster as required to achieve notable benefit from TML. So now I need to invest over 10€ per board (or more) to actually get it running? It'll take a loooong time (if ever) to pay back with the extra ~25 mhash/s per board that I will get. Half the time if I go through the hassle of SMD rework of the voltage controller resistors & ruin my warranty for extra ~25 mhash/s.

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July 26, 2012, 08:30:47 AM
 #688

I already spent 100€ on fans, stacking pillars and underside heat sinks for my Ztex 1.15x cluster as required to achieve notable benefit from TML. So now I need to invest over 10€ per board (or more) to actually get it running? It'll take a loooong time (if ever) to pay back with the extra ~25 mhash/s per board that I will get. Half the time if I go through the hassle of SMD rework of the voltage controller resistors & ruin my warranty for extra ~25 mhash/s.

Doesnt the ztex bitstream go up to 248mh/s now? or are you already using that?

Sorry to slightly hijack Elden...

kind regards

.,-._|\     Offgrid 1.7kW Solar and 3G wireless internet powering my mining rig.
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July 26, 2012, 08:40:20 AM
 #689

Doesnt the ztex bitstream go up to 248mh/s now?

No, the ztex bitstream gets  210MH/s.

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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July 26, 2012, 08:42:02 AM
 #690

So now I need to invest over 10€ per board (or more) to actually get it running?

Well, since 9 USD = 7.5 EUR my answer would be "no".

On the other hand, if you're unsatisfied with your ztex board, you probably want to talk to ztex about that.

By the way, I use one JTAG cable for every six Spartan chips -- works out to $1.50/chip.

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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July 26, 2012, 08:45:18 AM
 #691

Doesnt the ztex bitstream go up to 248mh/s now?

No, the ztex bitstream gets  210MH/s.

From kakobrekla's thread https://bitcointalk.org/index.php?topic=90370.msg997994#msg997994

This will be my last update or at least for a while, I have achieved maximum clock 248mhz at 1.41V, which is the ztex bitstream limit.
Still waiting for new releases of ET's TML release - maybe we will see some interesting numbers there.

Am I missing something?

kind regards


.,-._|\     Offgrid 1.7kW Solar and 3G wireless internet powering my mining rig.
/ .Oz. \
\_,--.x/     [219.5btc of successful trades total] with : rastapool, miernik, flatronw & OneFixt
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July 26, 2012, 08:48:14 AM
 #692

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Well, since 9 USD = 7.5 EUR my answer would be "no".

On the other hand, if you're unsatisfied with your ztex board, you probably want to talk to ztex about that.

By the way, I use one JTAG cable for every six Spartan chips -- works out to $1.50/chip.


How do you connect 6 Spartans to one Jtag cable?

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July 26, 2012, 08:55:13 AM
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By the way, I use one JTAG cable for every six Spartan chips -- works out to $1.50/chip.

How do you connect 6 Spartans to one Jtag cable?

JTAG is a daisy-chain protocol.

Imagine having six keyboards, each with a built-in USB hub -- you only need one USB port on your computer.

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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July 26, 2012, 08:57:05 AM
 #694

This will be my last update or at least for a while, I have achieved maximum clock 248mhz at 1.41V, which is the ztex bitstream limit.
Still waiting for new releases of ET's TML release - maybe we will see some interesting numbers there.

Am I missing something?

Yes, you did miss something: the overvolting.

My bitstream gets a hell of a lot more than 255MH/s at 1.41V.  But the convention is to post non-overvolted numbers to make comparison easy; otherwise things get silly very quickly.  I was easily able to get 283MH/s by overvolting, but I don't post those numbers in the topic title or use them for comparison (or anything else other than amusement with a big warning up front not to take them seriously).

Ergo, the ztex bitstream does not get anywhere near 248MH/s.

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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July 26, 2012, 09:02:08 AM
 #695

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JTAG is a daisy-chain protocol.

Imagine having six keyboards, each with a built-in USB hub -- you only need one USB port on your computer.

Ah didn't know that, thought it was on device per jtag only Smiley

My highest clock on Ztex 1.15y are 228MHZ aka 228MH/s with default board and news bitsream.

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July 26, 2012, 09:03:11 AM
 #696

My highest clock on Ztex 1.15y are 228MHZ aka 228MH/s with default board and news bitsream.

Very few of the boards get 228MH/s; the average is 210MH/s.

I have several boards that get more than 255MH/s, but again, I don't post those numbers -- I post the average.

The printing press heralded the end of the Dark Ages and made the Enlightenment possible, but it took another three centuries before any country managed to put freedom of the press beyond the reach of legislators.  So it may take a while before cryptocurrencies are free of the AML-NSA-KYC surveillance plague.
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July 26, 2012, 09:13:28 AM
 #697

yes you are right about that Smiley

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July 26, 2012, 09:14:31 AM
 #698

Yes, you did miss something: the overvolting.

My bitstream gets a hell of a lot more than 255MH/s at 1.41V.  But the convention is to post non-overvolted numbers to make comparison easy; otherwise things get silly very quickly.  I was easily able to get 283MH/s by overvolting, but I don't post those numbers in the topic title or use them for comparison (or anything else other than amusement with a big warning up front not to take them seriously).

Ergo, the ztex bitstream does not get anywhere near 248MH/s.

Ok, my apologies, I knew there was some middle ground I was missing.

kind regards

.,-._|\     Offgrid 1.7kW Solar and 3G wireless internet powering my mining rig.
/ .Oz. \
\_,--.x/     [219.5btc of successful trades total] with : rastapool, miernik, flatronw & OneFixt
       o
BR0KK
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July 26, 2012, 12:27:48 PM
 #699

i think he meant average of all boards (speaking all boards out there mining for different persons).

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July 27, 2012, 04:04:06 AM
 #700

ET, I could use some bitstream tech support when you get a chance.. C22 no worky..

-rph

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