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Monero CPU mining.

We currently have a couple of CPU miners running.  First off no they are not profitable however the mining does help recoup some of the cost of the machine running 24/7 anyway.  We’ve tried a couple of CPU miners for cryptonight algorithm and the hash rates don’t really vary that much one way or the other.  The is one thing that makes one better than any of the others we have tried to date.  Stability.  XMRIG without question is the most stable that we have used.

Mining on Nicehash

We have almost completely switched from Minergate and nanopool to NiceHash.  Minergate has a nice interface but their software just does not produce good hash rates and is windows based.  Mining XMR sgminer produces double the hash rate that Minergate software produces.  Windows based software tends to be much less stable than linux based systems and one thing you want for your mining operation is stability and performance.  So from Minergate we shifted to nanopool XMR.  Running sgminer there was alright but you have to mine 1 full XMR to see any payout.  At this point in the operation my miners are profitable but until we get a little bigger a more frequent payout is desirable.  So this brings us to Nicehash.  Great thing is you get paid in bitcoin regardless of what currency you are mining and payouts are every .001-.002 bitcoin to my external wallet.  So far the only real issue again is their software is windows based.  Running on windows 10 was horrible because its constantly updating…rebooting and screwing up the video drivers.  After a while of this nasty behavior we switched back to 7 and disabled updates….why not do that on 10 you ask?  Try disabling windows update on 10.  We even tested with an unregistered install and could not get it to stop updating…so without hacking windows update….its just easier to use 7 for the RX 550 and RX 560.  The RX 460 are happily mining on Ubuntu 16.04….yes a little more difficult to get up and running…but once they are…they just run.  Last night I switched the equihash mining over from sgminer at a hash rate of about 70-75sol/s per gpu to claymore zcash miner 12.6 because its producing 125-130sol/s per card so yes its worth paying his dev fee of 1%.

Supposedly the RX 5xx series does work with the linux drivers now so we will be revisiting that in the near future.  I am thinking there are a couple of steps that AMD left out of the instructions in the newer versions was my problem…but we shall see.

EBay far too greedy for our good.

In recent months myself and others have been noticing plummeting sales on ebay.  So I’ve done some investigating as to why this is happening.

As it is ebay gets paid twice for every listing that sells once when you list the item or pay your store subscription and a second time when the item sells in final value fees.   Now ebay is wanting sellers to pay them to promote search results.  Why should sellers pay ebay a third time???  In addition to this ebay pays no attention to the seller return policy and does whatever they want to thus enabling scammers to run rampant.

Back to search results to further encourage sellers to promote listings ebay is blocking outside search engines as much as they are able to.  So in order to maybe find anything on ebay you have to first goto ebay and search from there.  This is NOT how most internet users shop.  Most internet users start shopping by going to their search engine of choice and searching for whatever they want to buy.  So if you sell on ebay you’re being left out.  Myself and others have searched for example on google for our exact listing titles and have been on most occasions unable to find listings we know do exist.  Give it a shot yourself….see if your listings show up when you search.

At this point in time if there were a marketplace to sell on that was fair to both buyers and sellers it sure seems like plenty of people would be willing to make the switch.  Check the ebay forums among other places for many many complaints along these lines.

CPU Mining XMR – Monero revisited

We’ll be revisiting this topic because I just discovered that the wolf miner apparently is no longer or has been absorbed into something else.  So here’s another quick way to get started.  XMRIG has both support for linux and windows.  I’m using this primarily on ubuntu machines.

Download

Usage

Basic example

xmrig.exe -o pool.monero.hashvault.pro:5555 -u YOUR_WALLET -p x -k

Failover

xmrig.exe -o pool.monero.hashvault.pro:5555 -u YOUR_WALLET1 -p x -k -o pool.supportxmr.com:5555 -u YOUR_WALLET2 -p x -k

For failover you can add multiple pools, maximum count not limited.

Options

  -a, --algo=ALGO          cryptonight (default) or cryptonight-lite
  -o, --url=URL            URL of mining server
  -O, --userpass=U:P       username:password pair for mining server
  -u, --user=USERNAME      username for mining server
  -p, --pass=PASSWORD      password for mining server
  -t, --threads=N          number of miner threads
  -v, --av=N               algorithm variation, 0 auto select
  -k, --keepalive          send keepalived for prevent timeout (need pool support)
  -r, --retries=N          number of times to retry before switch to backup server (default: 5)
  -R, --retry-pause=N      time to pause between retries (default: 5)
      --cpu-affinity       set process affinity to CPU core(s), mask 0x3 for cores 0 and 1
      --cpu-priority       set process priority (0 idle, 2 normal to 5 highest)
      --no-huge-pages      disable huge pages support
      --no-color           disable colored output
      --donate-level=N     donate level, default 5% (5 minutes in 100 minutes)
      --user-agent         set custom user-agent string for pool
  -B, --background         run the miner in the background
  -c, --config=FILE        load a JSON-format configuration file
  -l, --log-file=FILE      log all output to a file
      --max-cpu-usage=N    maximum CPU usage for automatic threads mode (default 75)
      --safe               safe adjust threads and av settings for current CPU
      --nicehash           enable nicehash/xmrig-proxy support
      --print-time=N       print hashrate report every N seconds
      --api-port=N         port for the miner API
      --api-access-token=T access token for API
      --api-worker-id=ID   custom worker-id for API
  -h, --help               display this help and exit
  -V, --version            output version information and exit

Also you can use configuration via config file, default config.json. You can load multiple config files and combine it with command line options.

Algorithm variations

Since version 0.8.0.

  • --av=1 For CPUs with hardware AES.
  • --av=2 Lower power mode (double hash) of 1.
  • --av=3 Software AES implementation.
  • --av=4 Lower power mode (double hash) of 3.

Common Issues

HUGE PAGES unavailable

  • Run XMRig as Administrator.
  • Since version 0.8.0 XMRig automatically enables SeLockMemoryPrivilege for current user, but reboot or sign out still required. Manual instruction.

Other information

  • No HTTP support, only stratum protocol support.
  • No TLS support.
  • Default donation 5% (5 minutes in 100 minutes) can be reduced to 1% via command line option --donate-level.

CPU mining performance

  • Intel i7-7700 – 307 H/s (4 threads)
  • AMD Ryzen 7 1700X – 560 H/s (8 threads)

Please note performance is highly dependent on system load. The numbers above are obtained on an idle system. Tasks heavily using a processor cache, such as video playback, can greatly degrade hashrate. Optimal number of threads depends on the size of the L3 cache of a processor, 1 thread requires 2 MB of cache.

Maximum performance checklist

  • Idle operating system.
  • Do not exceed optimal thread count.
  • Use modern CPUs with AES-NI instruction set.
  • Try setup optimal cpu affinity.
  • Enable fast memory (Large/Huge pages).

Mining on Windows 10

We currently have one full time miner that is running windows 10.  While I much prefer a Linux system to mine with. Until I get the device drivers for the RX 550 and RX 560 to work I’m stuck with windows.  The windows 10 miner in question currently has 3 RX 550 and 1 RX 560 mining with SG Miner 5.5.5.  With its current settings its averaging 1.15x H/s.  I think there is probably still some room for improvement without overclocking/flashing bios etc.  Using Minergate software to mine with it worked but was pretty unstable.  Every few hours would randomly drop a GPU sometimes two.  Yes a reboot brought everything back.  Its the lost productivity I have a problem with and that’s where we switched over to SG Miner 5.5.5.  It is more stable but doesn’t seem like its going to be as stable as the linux systems have been thus far.  On another note on some GPUs I have observed that Minergate while very easy to get going may only hash at half the rate I get with SG Miner on a linux system.

HitBtc Exchange – Be wary.

I have been using HITBTC for a few months now to but/sell XDN.  The exchange itself seems to function well.  Then I had a question and contacted support.  Weeks go by with 0 response.  Then finally I get an email saying please resubmit your request using their new trouble ticket system.  By then I’ve figured out the answer on my own.

Then there was a problem which they acknowledge that users are unable to deposit XDN….weeks go by problem still not fixed.  This caused me to miss out on being able to sell XDN at the highest prices that I personally have ever seen XDN reach.

Later I enable 2FA authentication which works fine until I have to wipe my phone.  There is a backup code that you are supposed to use which was also on my phone when it was wiped….my fault completely.  Contact support for assistance…..weeks go by….NOTHING.  No response whatsoever.   So now I am unable to access my account.

Conclusion HITBTC when it works is great.  If you ever run into an issue then you are on your own.  If the issue is their problem it may be weeks or months being fixed.  Kinda makes me think they are more interested in taking your $$ than providing a fully usable service.  As for me I will be looking at other exchanges to trade crypto currency on.

AMD RX 460 XMR Mining on Ubuntu 16.04 with SGMiner-GM

Last night got the software installed and started mining XMR using SGMiner.  base settings produced an average rate of approximately 268H/s.  Still trying to optimize settings but am now averaging about 301H/s.  At current market prices etc this translates to $35-40/month for this GPU.  Later I will try to post a guide of how I got it to work.  On paper anyway it is easier to be profitable with the RX series because they use less power than other cards.