Bitcoin
BTC ATM
We have an Bitcoin ATM from GeneralBytes (first model of its kind) at the space where you can buy bitcoins. You can check it's status here
Bitcoin seminars
Next session
Do you want to organize some? Have some topics to present? Do You mine? Do you sell your stuff for Bitcoins? Do you trade? Tell us your story!
Past sessions
#1 - 20.6.2011 20:00
#2 - 14.11.2011 20:00
#3 - 28.11.2011 20:00
#4 - 2.4.2012 20:00
#5 - 28.1.2013 20:00
#6 - 11.4.2013 20:00
was a huge success according to number of visitors counted
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DDoSes on bitcoin services, MtGox fails and lags, ongoing price fall and many other topics
special guest: slush (actually he is regular visitor :))
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Resources
Mining
CPU | khash/sec | software |
Intel(R) Pentium(R) D CPU 3.40GHz | 2x 1337 | jgarzik's cpuminer |
Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz | 4x 2500 | jgarzik's cpuminer |
AMD Athlon™ 64 X2 Dual Core Processor 4800+ @ 2.5GHz | 2x 1168 | jgarzik's cpuminer |
Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (HT on) | 8x 1450 | jgarzik's cpuminer |
GPU | khash/sec | software |
nVidia GT216 [GeForce GT220] (rev a2) | 10550 | DiabloMiner,
poclbm |
nVidia Quadro FX 570M | 5000 | DiabloMiner |
nVidia G84 [GeForce 8600 GT] | 6300 | poclbm |
nVidia G92 [GeForce 8800 GT] (rev a2) | 28000 | poclbm |
nVidia G94 [GeForce 9600 GT] (rev a1) | 16000 | DiabloMiner |
nVidia GF104 [GeForce GTX 460] (rev a1) | 48000 | poclbm |
nVidia GF108 [GeForce GT 430] (rev a1) | 12000 | poclbm |
nVidia GF110 [GeForce GTX 580] | 120000 | DiabloMiner |
ATI Technologies Inc Radeon HD 5830
(Cypress LE) | 261000 | phoenix+phatk |
ATI Technologies Inc Radeon HD 5830
(Cypress LE) | 271500 | phoenix+phatk (900/900) |
ATI Technologies Inc Radeon HD 5830
(Cypress LE) | 278000 | phoenix+phatk (900/300) |
ATI Technologies Inc Radeon HD 5830
(Cypress LE) | 318000 | phoenix+phatk (1035/300) |
ATI Technologies Inc Radeon HD 5870
(Cypress LE) | 406000 | phoenix+phatk (900/300) |
Mining Notes
How to run?
./DiabloMiner-Linux.sh -u <user> -p <pass> -o api.bitcoin.cz -r 8332
./poclbm.py -d 0 -u <user> --pass=<pass> -o api.bitcoin.cz -p 8332
./minerd --userpass <user>:<pass> --url http://api.bitcoin.cz:8332
./phoenix.py -u http://<user>:<pass>@api.bitcoin.cz:8332/ -k phatk DEVICE=0 AGGRESSION=12 -v FASTLOOP=false WORKSIZE=128 BFI_INT VECTORS
ATI Overclocking
aticonfig --od-enable
aticonfig --odsc=900,900 # was 800,1000 by default
aticonfig --odcc
Problem compiling jgarzik's cpuminer
Makefile.am: installing `./INSTALL'
configure.ac:96: error: possibly undefined macro: AC_MSG_ERROR
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
libcurl.m4 is missing in your OS (i.e. apt-get install libcurl4-gnutls-dev)
Autorun phoenix after boot (Linux)
configure gdm autologin (you cannot use ~/.xinitrc and ~/.xsession)
in your Window manager add to “Startup applications” “xterm -e screen -c /home/brm/.screenrc-phoenix”
~/.screenrc-phoenix
autodetach on
startup_message off
screen -t phoenix 0 bash /home/brm/BITCOIN/phoenix-1.4/miner.sh
~/BITCOIN/phoenix-1.4/miner.sh
#!/bin/bash
. ~/.bashrc
export "DISPLAY=:0"
export LD_LIBRARY_PATH="/opt/AMD-APP-SDK-v2.4-lnx32/lib/x86/:$LD_LIBRARY_PATH"
ADRESAR="${HOME}/BITCOIN/phoenix-1.4/"
cd ${ADRESAR}
${ADRESAR}/phoenix.py -u http://brm@brmlab.cz_ati:zlatokopi@api.mining.cz:8332/ -k phatk DEVICE=0 VECTORS AGGRESSION=6 -v FASTLOOP WORKSIZE=128 BFI_INT
/etc/ld.so.conf.d/ati.conf (must be named *.conf)
/opt/AMD-APP-SDK-v2.4-lnx32/lib/x86/
run ldconfig
set 5830 to 900MHz core, 300MHz memory
Only GUI .deb tool for setting: http://sourceforge.net/projects/amdovdrvctrl/
generate own settings, save it.
Mine:
~/a.ovdr
<?xml version="1.0" encoding="utf-8"?>
<OVERDRIVE_PROFILE>
<PERFORMANCE_LEVEL level="2" gpu="90000" mem="30000" voltage="1163"/>
<PERFORMANCE_LEVEL level="1" gpu="60000" mem="30000" voltage="1063"/>
<PERFORMANCE_LEVEL level="0" gpu="15700" mem="30000" voltage="950"/>
<FAN_SETTING percentage="100"/>
<FAN_CTRL enabled="no"/>
<FAN_CTRL_CURVE type="0"/>
<FAN_CTRL_POINT nr="0" temperature="2000" percentage="0"/>
<FAN_CTRL_POINT nr="1" temperature="4000" percentage="2500"/>
<FAN_CTRL_POINT nr="2" temperature="6000" percentage="5000"/>
<FAN_CTRL_POINT nr="3" temperature="8000" percentage="7500"/>
<FAN_CTRL_POINT nr="4" temperature="10000" percentage="10000"/>
<MONITOR_SAMPLE_TIME interval="10"/>
<COLOR_PROFILE enabled="no" longitude="-13.000000" latitude="52.000000" color_temp_day="0" color_temp_night="0" transition="30"/>
</OVERDRIVE_PROFILE>
How to use setting batch mode (three card rig):
~/minuj.sh
#!/bin/bash
AMDOverdriveCtrl -i 0 -b a.ovdr
sleep 1
AMDOverdriveCtrl -i 3 -b a.ovdr
sleep 1
AMDOverdriveCtrl -i 6 -b a.ovdr
sleep 1
cd /home/kiki/phoenix
export DISPLAY=:0.0; aticonfig --pplib-cmd "set fanspeed 0 100"
export DISPLAY=:0.1; aticonfig --pplib-cmd "set fanspeed 0 100"
export DISPLAY=:0.2; aticonfig --pplib-cmd "set fanspeed 0 100"
aticonfig --od-enable
#aticonfig --od-setclocks=300,900 --adapter=all
sleep 2
./phoenix.py -u http://name:password@api.bitcoin.cz:8332/ -k phatk DEVICE=1 BFI_INT VECTORS AGGRESSION=12 &
sleep 2
./phoenix.py -u http://name2:password2@api.bitcoin.cz:8332/ -k phatk DEVICE=2 BFI_INT VECTORS AGGRESSION=12 &
sleep 2
./phoenix.py -u http://name3:password3@api.bitcoin.cz:8332/ -k phatk DEVICE=3 BFI_INT VECTORS AGGRESSION=12 &
Verification
aticonfig --odgc --adapter=all
aticonfig --odgt --adapter=all
DANGER !
Bios modification to unlock high frequency.
prereq:
dos boot disc,
atiflash http://www.techpowerup.com/downloads/1968/ATIFlash%203.86.html
radeon bios editor (rbe) http://www.techpowerup.com/downloads/Utilities/RBE/
tutorial http://www.techpowerup.com/downloads/Utilities/RBE/
example, not working on all, watch ^^^tutorial,:
tested: http://www.alza.cz/sapphire-hd-5830-xtreme-d237936.htm
boot to dos
card listing:
atiflash -i
acquire bios from first card:
atiflash -s 0 bios0.rom
on some windows machine (maybe under wine) run rbe,
load bios file, under "additional features" set upper limit GPU" (I set 1050)
save modified bios
go back to minning machine
atiflash -p 0 modbios.rom
then reboot to linux,
modify ^^^ a.ovdr,
set <PERFORMANCE_LEVEL level="2" gpu="100000" mem="30000" voltage="1125"/>
test for stability, watch for temperatures
my stable settings is gpu=103000, voltage 1163 (stock voltage)
MtGox YubiKey
YubiKey II is an USB device provided and used by MtGox as an OTP device to login into their webpage.
Using Yubikey on Linux
No driver needed. Plug-in your Yubikey.
kernel: usb 5-2: new low speed USB device using uhci_hcd and address 4
kernel: input: Yubico Yubico Yubikey II as /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/input/input13
kernel: generic-usb 0003:1050:0010.0003: input,hidraw0: USB HID v1.11 Keyboard [Yubico Yubico Yubikey II] on usb-0000:00:1d.0-2/input0
YubiKey serial num
It is not a QR code. It is
Data_Matrix in
ASCII encoding containing 6digits number printed under. You can generate your own
here.
One Time Password