ReUse of ZTEX FPGA 1.15y Boards - profitable LTC Mining (Guide)

[bitcoinminer42]

Hi Forum,

in the past I had some ZTEX FPGA Boards to mine BTC.
Now i reactivated them using LTC Mining. And hey... it's profitable ;-)
(approx. 64kHs/1.15y-board)

Step-by-step guide for Linux systems:
(<xxx> are placeholders ;-)

1. check out cgminer
   git clone https://github.com/ckolivas/cgminer.git

2. get version 3.1.1
   git checkout v3.1.1

3. checkout FPGA Litecoin Miner
   git clone https://github.com/kramble/FPGA-Litecoin-Miner.git

4. copy patch to cgminer
   cp experimental/Ztex-1-15y/cgminer-3.1.1/* <your cgminer base path>

5. copy binary to cgminer bitstreams (override original)
   cp experimental/Ztex-1-15y/ztex_ufm1_15y1-ltc-v04-1core-ucf-46-fmax-46.bit <your cgminer base path>/bitstreams/ztex_ufm1_15y1.bit

6. configure cgminer
   ./autogen.sh
   CFLAGS="-O2" ./configure --enable-ztex --enable-icarus --enable-scrypt --disable-opencl

7. compile and install cgminer
   make
   sudo make install

tested with ubuntu 12.04 and 2 original ZTEX 1.15y2 boards

WARNING: may damage your board... (i run it since 3 days without probs...)

more informations:
cgminer v3.1.1: https://github.com/ckolivas/cgminer/blob/v3.1.1/README
cgminer patch:  https://github.com/kramble/FPGA-Litecoin-Miner/blob/master/experimental/Ztex-1-15y/cgminer-3.1.1/README.txt

[bitcoinminer42]

now running a bunch of ZTEX 1.15y2 boards (hopefully) without problems.

each board takes approx. 24W/64kHs

edit: heatsinks remains cold. maybe i could try a fanless run :-)

[bitcoinminer42]

one of them will run this night without fans. tomorrow i'll see stats about hashing power and report them ;-)

[poohbah]

At 64kh, isn't it better to just ebay them? I'm showing a payback period of >290 days, assuming zero difficulty increases...

[tokyoghetto]

where can I buy these boards used?

[DAoneNonlyG]

where can I buy these boards used?

got 5 ztex quads (1 with only 3 cores working), 19 ztex singles and 10 enterpoint cm1...
located in germany... pn if intressted...

[bitcoinminer42]

one of them will run this night without fans. tomorrow i'll see stats about hashing power and report them ;-)

running fanless without any problems nor overheating

At 64kh, isn't it better to just ebay them? I'm showing a payback period of >290 days, assuming zero difficulty increases...

at this time it's not profitable to sell SPARTAN-6 boards as they are more worth than people are willing to pay.
if someone want to buy... PN me with your offer

[johnfox]

Hi,

I'm trying to get this running on my ztex 1.15y fpga boards and I'm getting following invalid nonce errors:

 [2014-04-01 17:42:23] ZTEX 0015-01-08-3: entering poll loop                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-1: entering poll loop                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-2: checkNonce failed for 0181301E hash7 1488598D                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-2: exit 0181301E                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-4: checkNonce failed for 0180D945 hash7 52440EE0                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-4: exit 0180D945                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-2: entering poll loop                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-3: checkNonce failed for 0180E45E hash7 683B6788                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-3: exit 0180E45E                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-4: entering poll loop                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-1: checkNonce failed for 0180EE33 hash7 9752A937                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-1: exit 0180EE33                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-3: entering poll loop                   
 [2014-04-01 17:42:23] ZTEX 0015-01-08-1: entering poll loop   

I have forced the frequency to 100MHz (lowest setting possible) and still getting this.
Anyone have and idea where to look?

thx a lot

[gtraah]

now running a bunch of ZTEX 1.15y2 boards (hopefully) without problems.

each board takes approx. 24W/64kHs

edit: heatsinks remains cold. maybe i could try a fanless run :-)

64KH? hmmmm

I think its more profitable to by those AUD-$45 : LTC/BTC Usb Dual miners 70KHs and it uses much less power than 24w Even that it will probably make u 2 cents a day << Just a guesstimate lol