A few weeks ago I posted a how-to on building a Linux GPU miner for Claymore.Well, at least as of right now, the Optiminer 1.5 Zcash miner is faster than Claymore.I have set up my mining rigs to run both Claymore and Optiminer now.I recommend you run Optiminer 1.5 on Ubuntu Linux.It’s much easier to SSH into a remote linux miner and change what it is running than to do the same thing with Windows.No VPN connection required, just SSH to my $10/month VPS box running Linux, SSH from there to the Linux box at my small office that my firewall forwards TCP port 22 to, and from there SSH to my GPU-miners.Copy the files from one miner to another with SCP, reboot remotely if the mining application hangs, and otherwise do complete management remotely.Linux is great for system administration!Here’s the speed of Optiminer 1.5 on a six GPU mining rig running Sapphire Nitro R9 Fury cards – about 2620 H/s: And on a miner with six XFX RX480-8G GPU’s.It’s around 1730 H/s The improvement over the Claymore application is enough to make the switch.

By the way, this is with stock, unmodified BIOS on the GPU’s.Equipment list – Links are to Newegg or Amazon or Parallel Mining product page Total Cost for Bill of Materials – $2270 I used an MSI board in the video, and the Biostar on a different build.I like the Biostar better because it does not require any messing around with BIOS.bitcoin loi franceAnd it costs less.mine litecoin macBuy twice as many PCI-E risers as you think you will need.ethereum earning calculatorI’ve tried 3 different brands, and usually half of the risers will be bad and won’t work.litecoin mining time calculatorMost of the time the GPU card will stop working due to a bad risers after a few hours or a day.bitcoin raw block data

This latest batch had some that had electric shorts that prevented the PC from starting!You may want to buy two of the HP power supplies also.I always forget something when I build the machine.Here’s some basic instructions for the most efficient order of operations.The idea is to get a basic computer built, troubleshoot any potential issues, install the operating system and application, then build the rest of the machine.is bitcoin mining bad for gpuIf it doesn’t boot, this is the time to do basic troubleshooting.Don’t add any more graphics cards until later after the operating system is installed.The motherboard has a VGA connector if you want to connect a monitor directly to it.Just make sure there are no graphics cards plugged in if you use the onboard video.Install Ubuntu 16.04 LTS Server Do a standard install using all the defaults , include OpenSSH on installation After install, login with your username and password Get ip address with Go to your PC, ssh to the Ubuntu machine, and do the rest of the setup from your PC so you can copy and paste the commands.

I prefer to SSH from Bash shell, but Putty is a good client also.If you are using a Bash shell from Windows or a Linux machine, or terminal from a Mac, make your logins easier in the future by creating a key on your own computer, then placing it on the miner.Do this on your own computer, at the shell prompt: ssh-keygen -t rsa -b 4096 ssh-copy-id [email protected] Type the password for the miner, and that should be it.Now you can login without using a password because your trusted key is installed.Change colors in the VIM editor.If you don’t like VIM, use nano instead.Add in new file .vimrc In the file .bashrc change #force_color_prompt=yes to add this at the end: Upgrade the operating systems in a screen: Not sure why Ubuntu locks one IP address into itself when it first gets an IP address.So that needs to be changed.Step 1: Disable the default Firmware inherited names.Edit your /etc/default/grub les as root and fill them.Paste this into the new file you just created: Change device names to eth0 so it reads: Look up your hardware device name (MAC address) with Go to your DHCP server and map your preferred IP address to the hardware address.

You’re on your own for that one.Note that this is entirely optional!You can leave the IP address that was assigned and not change it if you prefer.Check in the screen to make sure the update is finished When the update is finished REBOOT SSH to box using the new IP address you assigned in your DHCP server!If you didn’t change it, then it should be at the same address as before.If you can’t find it, login to the terminal at the computer, type if you only have a loopback address of 127.0.0.1 then run the DHCP client to get an ip address you can ssh to and redo the network fix.Copy 2 files from PC to server somehow.I like to use scp, but sftp works also.Install AMD driver Install AMD SDK (optional – some application need this, others don’t) Add user to video group Edit the config file for xorg-legacy: delete the last line: allowed_users=console insert at end of file: Create a new file for operating without a monitor connected to box: Make sure X works for user on login Add the following at end of .bashrc Change /etc/profile to make it work # add the following at end of /etc/profile: Set variables when user calls X /Optiminer/OptiminerZcash by typing change the mine.sh file to make the first three lines look like this: Change the t address you are mining to in the mine.sh file, and make sure you are connecting to your local flypool server, then start mining.

Watch and see if anything breaks.This could be an error code, hardware freeze, or something else.If it goes well, great!Go on to the next step.To exit the screen and keep the miner running when you log out of your session, type a Ctrl-a, followed by just the key d. Then exit your ssh session with If there is a problem, it is usually: Add one riser and  GPU at a time, boot, and make sure it works.First power 3 of the cards from the Antec power supply.Then power the other 3 cards with the HP power supply.Quick way to see if Ubuntu recognizes the board is with This box is going to pull 15 amps at 110 VAC.Be careful with your breakers.The power supplies run more efficiently at 200+ volts.If you have the option to supply your miner with more than 200VAC, do it.Finally, if everything is working, turn up the intensity.In the mine.sh file, add -i 7 to the optiminer start command, so it looks like this: Best of luck – let me know if you have comments or questions on this build.