Building Cheap Miners : My "Secret"

[MinersRus]

New Numbers using XMRig 5.1.0:


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

    47318 H/s for RandomX

    3483 watts (14.1 Amps * 247 VAC) avg of 871 watts per server measured at the panel.9.0c per KWH

30000 * 47318 * 2.1 * 53.39 / (3483  * 0.090) = 507.7 MH/s


So with the current Monero World Hash Rate at 790 MH/s these servers are unprofitable.

https://2miners.com/xmr-network-hashrate


I will be mining on them for about 12 more hours because I need 17% more to get one more coin.

Then they will be powered off until Monero price recovers for them to become profitable. If that doesn't happen I will sell them off.

[1714016712]

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[EnglishGentleman]

New Numbers using XMRig 5.1.0:


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

    47318 H/s for RandomX

    3483 watts (14.1 Amps * 247 VAC) avg of 871 watts per server measured at the panel.9.0c per KWH

30000 * 47318 * 2.1 * 53.39 / (3483  * 0.090) = 507.7 MH/s


So with the current Monero World Hash Rate at 790 MH/s these servers are unprofitable.

https://2miners.com/xmr-network-hashrate


I will be mining on them for about 12 more hours because I need 17% more to get one more coin.

Then they will be powered off until Monero price recovers for them to become profitable. If that doesn't happen I will sell them off.

Yes. Very disappointing. My power cost is $0.062.   My Dell R815 generates 9.8 KS with XMRIG 5.01 for about 720 Watts of power. Four Opteron 6236 per machine. I plan to sell these servers.  At my power cost the servers are at breakeven but I expect it will get worse and there is no point running them.

Mine seem to be using a bit less power than yours. Not sure why. May be due to lower CPU clock speed.

[ozaudio]

running 4 x 16c opterons, ES chips... with hugepages 9600 and ps max 1  ( max 2.2 )  i was getting 10000 h/s. after i installed turion power control i simply typed this into the terminal and am upto 12200 h/s


sudo tpc -psmax 6
sleep 1
sudo tpc -fo 1
sudo tpc -set ps 1 freq 3000 vcore 1.1850
sudo tpc -set ps 0 freq 3000 vcore 1.1850
sleep 1
sudo tpc -fo 0
sleep 1
sudo tpc -psmax 1

* ABOUT        XMRig/5.1.0 gcc/5.4.0
 * LIBS         libuv/1.8.0 OpenSSL/1.0.2g hwloc/1.11.2
 * CPU          AMD Eng Sample, ZS222445TGG44_32/22/2_2/16 (4) x64 AES
                L2:64.0 MB L3:48.0 MB 64C/64T NUMA:8
 * MEMORY       20.7/31.4 GB (66%)
 * DONATE       1%
 * ASSEMBLY     auto:bulldozer
 * POOL #1      randomxmonero.eu.nicehash.com:3380 algo rx/0


does anybody think i can manage more than 3000 from these cpus ? given im already up from 2.2 to 3 i consider this a good overclock but i see people doing 3.4 / 3.6 at VCore:1.3125 . cooling isn't an issue, its fully water cooled and here in the UK in my shed its cold.  but will my 1000w cooler master pro   keep up!

https://ibb.co/Y2BZ253

[PharmEcis]

Sundownz how is the farm going?  Are your R815's powered off like mine?

I'm mostly running FPGAs now but still have a few GPUs going.

[jakkwb]

Hello, been following this thread for a while now. Could not find an answer to this if someone could clue me in:

do the Xeon E7-4830s not perform like they should for hashrates? It has enough L3 cache.

[MinersRus]

Hello, been following this thread for a while now. Could not find an answer to this if someone could clue me in:

do the Xeon E7-4830s not perform like they should for hashrates? It has enough L3 cache.

I am going to assume that these are the original Westmere Microarchitecture from 2011 as you didn't state V2, V3 or V4.

Intel Xeon E7-4830 specifications
http://www.cpu-world.com/CPUs/Xeon/Intel-Xeon%20E7-4830%20AT80615007089AA%20(BX80615E74830).html

Also assuming that you are looking to mine RandomX (and variants).

The L2 cache on the Xeon E7-4830 limits it to the maximum of 8 threads.

RandomX needs 256kb of L2 cache and 2mb L3 cache per mining thread.

Xeon E7-4830 has:
Level 2 cache size: 8 x 256 KB <-- this limits the Xeon E7-4830 to only 8 threads
Level 3 cache size: 24 MB

You might want to look at upgrading to better (more cores) or faster ones for more performance.

The best way to judge performance differences between processors is to note the Maximum turbo frequency while using all the cores:

So using the Xeon E7-4830 is: 8 (cores) times 2.267 GHz equals 18.136 which will be the BASE for reference

now comparing  to:

Xeon E7-4850: 10 (cores) times 2.133 GHz equals 21.33 or 17.6% faster
Xeon E7-4860: 10 (cores) times 2.400 GHz equals 24 or 32.3% faster
Xeon E7-4870: 10 (cores) times 2.533 GHz equals 25.33 or 39.7% faster

Intel Xeon E7-4800 microprocessor family
http://www.cpu-world.com/CPUs/Xeon/TYPE-Xeon%20E7-4800.html

You may also want to consider the E7-8800 series as they are plug compatible with the E7-4800 series, The HP DL580 servers can use the 8800 processors. Be sure to check if your system can use the 8800 processors.

Intel Xeon E7-8800 microprocessor family
http://www.cpu-world.com/CPUs/Xeon/TYPE-Xeon%20E7-8800.html

Xeon E7-8837: 8 (cores) times 2.800 GHz equals 22.4 or 23.5% faster
Xeon E7-8867L: 10 (cores) times 2.267 GHz equals 22.67 or 25% faster
Xeon E7-8870: 10 (cores) times 2.533 GHz equals 25.33 or 39.7% faster

[jakkwb]

Ok, looking for the best ways to get heat out of my mining room...

8 x 10 room with 9ft ceilings, single window, single inside door. Generating a lot of heat.

I don't know anything about thermal stuff. Would it be best to:

1. Use a vent hood like apparatus with fan to get heat into the attic?

2. Use an attic fan for the same affect?

3. Put a fan or air conditioner in window for fresh/cool air?

[Zorg33]

Ok, looking for the best ways to get heat out of my mining room...

8 x 10 room with 9ft ceilings, single window, single inside door. Generating a lot of heat.

I don't know anything about thermal stuff. Would it be best to:

1. Use a vent hood like apparatus with fan to get heat into the attic?

2. Use an attic fan for the same affect?

3. Put a fan or air conditioner in window for fresh/cool air?

That is not closely related to the topic?

There are at least two options.

1. open a hole on the opposite side of the room and cover it with a grill or something and put an axial fan on the window that blows the warm air OUT.
2. divide the room in the middle in a U shape so you can use the window for both intake and outtake. This also works well, I tried this.

http://www.kepfeltoltes.eu/view.php?filename=295U_shape.jpg

[CryptoPr0t0]

GTX 1060 is pretty good in performance and price. But the problem with 3GB cards is they don't work on many algorithms. I want to which coins are you mining with 1060?

[sundownz06]

Have been down for about 9-months since I moved warehouses. Kind of a bummer! Hoping to get at least partially running again for winter to heat up the new warehouse a bit, haha!

Decided to sell my Dell R815s if anyone is interested:

https://bitcointalk.org/index.php?topic=5278003.0

[jimleeucf]

To save money for miners, we can buy used computer components or recycle the used or bad computer components. There are many such online sellers such as eBay, BuySellRam.com, to whom you can sell graphics card, sell cpu, sell memory, sell ssd.....
even more, sell network equipment, sell test equipment...

[MinersRus]

Hopefully no one here is mining in Texas on a non-fixed electric contract.

With the freeze and blackouts hopefully no one is on Griddy or any other variable rate electric plan.

Griddy customers face $5,000 electric bills for 5 freezing days in Texas
https://www.dallasnews.com/business/2021/02/20/griddy-customers-face-5000-bills-for-5-freezing-days-in-texas

Some Texans are facing yet another crisis: how to pay enormous electric bills.

The Texas power supplier Griddy, which sells unusual plans with prices tied to the spot price of power on the Texas grid, warned its customers over the weekend that their bills would rise significantly during the storm and that they should switch providers.

Some quickly looked into doing that but found the actual changeover of service wouldn’t happen for days.

Now customers say they never dreamed they’d be billed in the four figures for five days of service.

Karen Cosby said her cost is $5,000 for usage since Saturday at her 2,700-square-foot house in Rockwall.

DeAndre Upshaw of Dallas said the electric bill for his 900-square-foot, two-story townhouse was also $5,000

Some Texas Residents See Electric Charges Jump as Much as $14K After Winter Storm
https://www.msn.com/en-us/news/us/some-texas-residents-see-electric-charges-jump-as-much-as-dollar14k-after-winter-storm/ar-BB1dRmGD

I am on New Power's 36 month fixed price plan at a total rate (all costs) of 9c per KWh. I also have my bill charged to a USbank Visa card that gives me back 5%. I pay the card in full so no interest or fees are ever paid. So that 9c turns into 8.55c per KWh.