Re: Building Cheap Miners : My "Secret"

Quote from: EnglishGentleman on November 14, 2019, 05:38:11 PM

Quote from: MinersRus on November 13, 2019, 09:00:24 PM

17 days until Monero forks to RandomX.

I am pumped.

I am currently in the process of wiring another 20 AMP 240 VAC circuit to attach my third 16 AMP PDU.
This is needed for my third set of four Dell R815 Servers.

My garage mining setup will contain twelve Dell R815 Servers with a mixture of quad 6348 & 6378 Opterons.
Also a single SuperMicro Server with dual 6376 Opterons overclocked to 3 GHz.

This is what I have measured for four Dell R815 Servers on one PDU.
Two with quad 6348 and two with quad 6378 Opterons.

On the current CN/R algorithm:

6866.8 H/s
2880 watts (12 Amps * 240 VAC) avg of 720 watts per server measured at the panel.
9.2c per KWH

This setup would be mining for a loss of $4.18 a day which is why these have been powered off and will stay off until the November 30th fork.

https://www.cryptocompare.com/mining/calculator/xmr?HashingPower=6866.8&HashingUnit=H%2Fs&PowerConsumption=2880&CostPerkWh=0.092&MiningPoolFee=1.0

The same same four servers produce 43890 H/s for RandomX.

I will post the RandomX numbers, Hash Rate, Power, and hopefully Profit for this setup after the fork.

Good luck everyone.

FYI: I am using XMRig for my RandomX miner. You can set it to 1% donation or 0% if you compile from the source

https://github.com/xmrig/xmrig/releases/tag/v5.0.0

XMRig 5.0.0, stable release, unified 3 in 1 miner, CPU+OpenCL+CUDA
https://www.reddit.com/r/MoneroMining/comments/dvv637/xmrig_500_stable_release_unified_3_in_1_miner

Thanks for the update. Lets hope RandomX is as profitable as expected.

I have two HP DL580 G7 Quad E7-8837 and have 5 R815 coming on Friday.

What I did not expect is that Windows 10 has a limit of 2 CPU! So do CPU go unused.

How do you get around this problem? Which OS are you using?

Obviously Windows Server is expensive.

Thanks for your support.

I use Ubuntu 16.04 Desktop which is FREE.

I will follow up this post with detailed instructions for Ubuntu 16.04 Desktop installation.

On the Dell R815's I put in a 16GB USB stick installed inside at the front left side where there is an internal USB port.
On the HP DL580's I use a cheap 60GB 2.5" SSD installed inside.

I also install an inexpensive ($10) Quadro 600 graphics card in each server because the built-in Server GPU has a limit of 1024x768 resolution which is painful to my eyes.

See here for cheap reliable and fast 16GB USB sticks:
https://bitcointalk.org/index.php?topic=1955358.msg51847827#msg51847827