For those interested in mining with GTX 750's here is an eBay link to what I am currently purchasing.
https://www.ebay.com/itm/ZOTAC-NVIDIA-GeForce-GTX-750-1-GB-GTX750-1GD5-Video-Card-128bit-DVI-HDMI-VGA/142732559955
These GTX 750's are Zotac branded, have the full double wide bracket (easier to attach to mining frames) and can be easily overclocked. I am getting around 245 H/s at 38.5 watts on these.
Another good thing is that these need no additional power cables as they get all their power from the PCIe slot. With the power draw being so low you can use risers that are powered with SATA to 6-pin cables.
Topic: Building Cheap Miners : My "Secret" - page 13. (Read 60235 times)
I'm quite interested in this if you decide you want to sell your software.
I've reached out to you a couple of times thinking you might have some interest in being pitched. But I don't plan on releasing any firmwares or selling devices.
Damn... must be in my PMs... I almost never look there. Will check it =)
I'm considering possibly building boards to take the profit out of it for bittware. I'm unhappy that they're going to screw the community. See sig.
Yes some people here do have very large budgets but their ideas like using the HP Z400, or the HP DL580 G7's with Xeon E7-8837's, or the Dell R815's with AMD 6200/6300 Opterons are very good ideas in how to build a farm at a much lower cost. My primary GPUs that I mine with are GTX 750's (Nvidia Maxwell) that I buy for less than $40.
Whoa how are 750's profitable? I guess at that low price it would make sense, but seems like it would take forever for ROI just the computer costs.
edit: don't mean to challenge or disagree, i am actually very intrigued by low cost mining options and just curious how you make it profitable.
I have 37 GTX 750's installed in my various systems. On Monero using XMR-Stak they hash 230 H/s on average. Low of 220 H/s high of 250 H/s if they can overclock.
That gives me 8510 H/s for just those 37 GTX 750's.
They use about 38 watts each while mining. Power usage is 1406 watts internally. With 85% efficient power supplies that means 1654 watts at the wall.
Monero Mining Profitability for the above cards
https://www.cryptocompare.com/mining/calculator/xmr?HashingPower=8510&HashingUnit=H%2Fs&PowerConsumption=1654&CostPerkWh=0.071&MiningPoolFee=1
Yearly I will mine about 24 XMR with a profit of about $4500 after power costs on those 37 GTX 750's.
Also realize that the systems I purchased, like the HP DL580 G7's that have 11 PCIe slots, are also mining on the processors which adds 1560 H/s to each system.
-------------------------------
If you just look at a single GTX 750 purchased at $38.50 (current eBay price) and use these numbers:
220 H/s - lowest that they do
38 watts = 44.7 watts at the wall
7.1 cents per KWh - my rate
No mining fee - I set donation level to 0.0% in XMR-Stak
1% Pool Fee
https://www.cryptocompare.com/mining/calculator/xmr?HashingPower=220&HashingUnit=H%2Fs&PowerConsumption=44.7&CostPerkWh=0.071&MiningPoolFee=1
Shows a profit of $115 yearly so at $38.50 each one is paid for in four months.
-------------------------------
On the subject of ROI on computer costs here is a breakdown on the three HP DL580 G7's with 20 GTX 750's running in them.
Costs: HP DL580 G7 one at $330, two at $487 for a total of $1304. Twenty GTX 750's at an average cost of $40 totals an additional $800 for a Grand Total of $2104.
There are some other miscellaneous costs (Mining rack, 60GB SSD drives, Power Cables, Xeon E7-8837's) but these will be offset by selling the extra 1200 Watt Power supplies, 192 GB of PC3-10600R Memory, Xeon Processors and Memory Cartridges that came with the DL580's that are not needed. Selling these will actually lower my overall cost.
These three systems are on the Free HiveOS mining Monero at a rate of 9.34 KH/s using 2.49 KW at the wall.
https://www.cryptocompare.com/mining/calculator/xmr?HashingPower=9340&HashingUnit=H%2Fs&PowerConsumption=2490&CostPerkWh=0.071&MiningPoolFee=1
That results in a profit of $4631 yearly so these systems will be paid for in 5.5 months. I have been mining with them for about a month so 4.5 more months to pure profit.
whoa that is awesome
thanks!! Just found this thread. I've got two DL580 G7's with E7-4870's. I'm currently mining with 30 GPU's on standard mobo's. Never could get GPU's to work in these. Is it still profitable to set these up and eliminate the "small" rigs? I am currently running ZEC, but would switch out to something else if profitability is there. Would definitely want to swap CPU's to 8837's.
It all depends i would say. The DL580's are power-hoggers. What is nice is H/s per $ on the initial costs, but running them worth profit requires cheap electricity since there is a lot of overhead power drain on these systems.
One easy way to save power on the DL580 G7's is only run with the minimum number of memory cartridges. Each cartridge uses 30 watts.
Also mining doesn't really need much in the amount of memory.
This is from a PM on the subject of saving power:
Quote
I have now gotten three DL580 G7's up and running with HiveOS. I am always looking for ways to save power on the DL580's and this is a way to save an addition 90 watts per system with very little hit to the processor hash rate.
From my previous post(s) I have found that each memory cartridge uses 30 watts. So the first thing I did was to remove four of the eight cartridges and have only one per processor. That saved 120 watts per system.
With further thought, since XMR-Stak running on processor cores should only use the internal L3 cache, what if I only had one cartridge on processor 0. The other processors if they need to get to memory would hop from processor to processor.
Doing that XMR Stak only took a 1-2% hit to hash rate from 1618 to 1587 on one DL580 and 1617 to 1599 on another. Booting up the DL580 with only one cartridge is fine as is booting HiveOS. The only thing you will see in the when XMR-Stak starts up that it will say "hwloc can't bind memory" but as seen above it really doesn't effect hash rates much at all.
One physical issue I need to address is that without memory cartridges installed the metal flap closes the vent to the front which does restrict air flow. I either need to remove those flaps or install a wooden spacer bar that would hold them open.
From my previous post(s) I have found that each memory cartridge uses 30 watts. So the first thing I did was to remove four of the eight cartridges and have only one per processor. That saved 120 watts per system.
With further thought, since XMR-Stak running on processor cores should only use the internal L3 cache, what if I only had one cartridge on processor 0. The other processors if they need to get to memory would hop from processor to processor.
Doing that XMR Stak only took a 1-2% hit to hash rate from 1618 to 1587 on one DL580 and 1617 to 1599 on another. Booting up the DL580 with only one cartridge is fine as is booting HiveOS. The only thing you will see in the when XMR-Stak starts up that it will say "hwloc can't bind memory" but as seen above it really doesn't effect hash rates much at all.
One physical issue I need to address is that without memory cartridges installed the metal flap closes the vent to the front which does restrict air flow. I either need to remove those flaps or install a wooden spacer bar that would hold them open.
Follow-up:
Quote
I have a solution for holding open the flaps.
I am using one of these small clips for each flap that I want to force open:
https://www.amazon.com/Staples-Metal-Binder-Clips-10667-CC/dp/B01LYTURRW
When they are attached holding the flap open flip down the metal loop on the inside of the case and on the metal loop on the outside squeeze it to remove it. Keep at least one metal loop if you want to easily remove the clip again. The metal shield over the memory and CPUs attaches fine with these clips installed and the whole processor/memory assembly fits into the unit without issue.
I now have three openings for air, one into the single memory cartridge and the other three in front of processors 2, 3 and 4.
I am using one of these small clips for each flap that I want to force open:
https://www.amazon.com/Staples-Metal-Binder-Clips-10667-CC/dp/B01LYTURRW
When they are attached holding the flap open flip down the metal loop on the inside of the case and on the metal loop on the outside squeeze it to remove it. Keep at least one metal loop if you want to easily remove the clip again. The metal shield over the memory and CPUs attaches fine with these clips installed and the whole processor/memory assembly fits into the unit without issue.
I now have three openings for air, one into the single memory cartridge and the other three in front of processors 2, 3 and 4.
Another solution:
Quote
I ended up using a 2" wide piece of cardboard cut the width of the proc/mem case with 3 slots the flaps to keep them open, I also ended up with one slot open per CPU.
Final Follow-up:
Quote
In case the cardboard doesn't last I need to point out a few updates to my solution. I have only one memory cartridge installed in the top slot (I'll call it #1). The other three flaps I have open is #2, #5 and #7. The clips are also positioned to the left end of the flaps that way they don't block the 4 metal tabs on the top plate so that it can cleanly be installed. The reason I do flap #2 and not #3 is if I did #3 it does not allow the front handle to close properly. Even with not doing #3 the handle will close but not latch unless you give the blue latch some downward pressure.
Also I feel comfortable in that the clips will stay in place because of their strength and that the top metal plate holds them down.
Also I feel comfortable in that the clips will stay in place because of their strength and that the top metal plate holds them down.
I had 748287-B21's : https://www.hpe.com/us/en/product-catalog/servers/power-supplies/pip.hpe-1200w-common-slot-platinum-hot-plug-power-supply-kit.6458603.html
Interesting.
My HP DL580 G7's which came with either quad X7560 or quad E7-4850 processors only had the Silver rated power supplies. I wonder if the power supplies were an option when originally ordered or if the better ones (Gold/Platinum) came with the more expensive systems.
Just found this thread. I've got two DL580 G7's with E7-4870's. I'm currently mining with 30 GPU's on standard mobo's. Never could get GPU's to work in these. Is it still profitable to set these up and eliminate the "small" rigs? I am currently running ZEC, but would switch out to something else if profitability is there. Would definitely want to swap CPU's to 8837's.
It all depends i would say. The DL580's are power-hoggers. What is nice is H/s per $ on the initial costs, but running them worth profit requires cheap electricity since there is a lot of overhead power drain on these systems. If your electricity is not cheap, i wouldn't mind moving my cards from the standard mobos. Perhaps you could take 1-2 PSU's from them switch to, since they are 90-95% platinum rated. Then you need breakout boards.
The power supplies that came with my five HP DL580 G7's are only Silver Rated. Efficiency ( % ) is 87% at 120 VAC and 89% at 240 VAC.
The following is found in the "HP Common Slot Power Supplies QuickSpecs - DA - 14209 Worldwide — Version 1 — March 6, 2012" PDF that I found somewhere on the internet. It is the only manual that had the exact part number match 490594-001 and 498152-001 for the HP DL580 G7 Power Supplies.
HP 1200W Common Slot Silver Hot Plug Power
Supply Kit (500172-B21)
HP's Generic Part Number 490594-001
HP's Spares Part Number 498152-001
Input Voltage Range ( V rms ) 100-240
Frequency Range (Nominal) ( Hz ) 50 / 60
Nominal Input Voltage ( Vrms ) 100 120 200 208 220 230 240
Maximum Rated Output Wattage Rating 800 900 1200 1200 1200 1200 1200
Nominal Input Current ( A rms ) 9.7 9.0 7.0 6.8 6.4 6.1 5.9
Maximum Rated Input Wattage Rating ( Watts ) 930 1034 1348 1348 1348 1348 1348
Maximum Rated VA ( Volt-Amp ) 970 1079 1406 1406 1406 1406 1406
Efficiency ( % ) 86 87 89 89 89 89 89
Power Factor 0.97
Leakage Current ( mA ) 0.42 0.50 0.83 0.87 0.92 0.96 1.00
Maximum Inrush Current ( A peak ) 30
Maximum Inrush Current duration ( mS ) 20
Maximum British Thermal Unit Rating ( BTU-Hr ) 3174 3530 4600 4600 4600 4600 4600
Just found this thread. I've got two DL580 G7's with E7-4870's. I'm currently mining with 30 GPU's on standard mobo's. Never could get GPU's to work in these. Is it still profitable to set these up and eliminate the "small" rigs? I am currently running ZEC, but would switch out to something else if profitability is there. Would definitely want to swap CPU's to 8837's.
It all depends i would say. The DL580's are power-hoggers. What is nice is H/s per $ on the initial costs, but running them worth profit requires cheap electricity since there is a lot of overhead power drain on these systems. If your electricity is not cheap, i wouldn't mind moving my cards from the standard mobos. Perhaps you could take 1-2 PSU's from them switch to, since they are 90-95% platinum rated. Then you need breakout boards.
Just found this thread. I've got two DL580 G7's with E7-4870's. I'm currently mining with 30 GPU's on standard mobo's. Never could get GPU's to work in these. Is it still profitable to set these up and eliminate the "small" rigs? I am currently running ZEC, but would switch out to something else if profitability is there. Would definitely want to swap CPU's to 8837's.
The only problem you will have is that a lot of the things you want to sell, won't. I've had cartridges on Ebay for months now at the CHEAPEST price of all listed, and I've sold ZERO. 
Well I do know the 320 GB (80x 4GB) PC3-10660R memory that I got in those five DL580's will sell.
Memory will be the first to go. Resellers will send you lowball offers.
The only problem you will have is that a lot of the things you want to sell, won't. I've had cartridges on Ebay for months now at the CHEAPEST price of all listed, and I've sold ZERO.
Well I do know the 320 GB (80x 4GB) PC3-10600R memory that I got in those five DL580's will sell.
Tried reading through the whole thread...but it's really long
Has anyone found any "cheap" 4U+ rack mount systems that can run 4-7 cards internally?
Has anyone found any "cheap" 4U+ rack mount systems that can run 4-7 cards internally?
The HP DL580 G7 can be found for less than 500$: https://h20195.www2.hpe.com/v2/getpdf.aspx/c04123267.pdf?ver=19+
+ 591205-001 HP DL580 G7 PCI EXPRESS RISER CARD
+ https://www.ebay.com/itm/10pin-to-6-6pin-Power-Adapter-Cable-for-HP-ProLiant-DL580-G7-and-GPU-50cm/141964325336
The only problem you will have is that a lot of the things you want to sell, won't. I've had cartridges on Ebay for months now at the CHEAPEST price of all listed, and I've sold ZERO.
Damn, wish I'd gone that route. Energy wise that is the second most energy efficient monero stat I've seen (affordably, anyway).
Yes some people here do have very large budgets but their ideas like using the HP Z400, or the HP DL580 G7's with Xeon E7-8837's, or the Dell R815's with AMD 6200/6300 Opterons are very good ideas in how to build a farm at a much lower cost. My primary GPUs that I mine with are GTX 750's (Nvidia Maxwell) that I buy for less than $40.
Whoa how are 750's profitable? I guess at that low price it would make sense, but seems like it would take forever for ROI just the computer costs.
edit: don't mean to challenge or disagree, i am actually very intrigued by low cost mining options and just curious how you make it profitable.
I have 37 GTX 750's installed in my various systems. On Monero using XMR-Stak they hash 230 H/s on average. Low of 220 H/s high of 250 H/s if they can overclock.
That gives me 8510 H/s for just those 37 GTX 750's.
They use about 38 watts each while mining. Power usage is 1406 watts internally. With 85% efficient power supplies that means 1654 watts at the wall.
Monero Mining Profitability for the above cards
https://www.cryptocompare.com/mining/calculator/xmr?HashingPower=8510&HashingUnit=H%2Fs&PowerConsumption=1654&CostPerkWh=0.071&MiningPoolFee=1
Yearly I will mine about 24 XMR with a profit of about $4500 after power costs on those 37 GTX 750's.
Also realize that the systems I purchased, like the HP DL580 G7's that have 11 PCIe slots, are also mining on the processors which adds 1560 H/s to each system.
-------------------------------
If you just look at a single GTX 750 purchased at $38.50 (current eBay price) and use these numbers:
220 H/s - lowest that they do
38 watts = 44.7 watts at the wall
7.1 cents per KWh - my rate
No mining fee - I set donation level to 0.0% in XMR-Stak
1% Pool Fee
https://www.cryptocompare.com/mining/calculator/xmr?HashingPower=220&HashingUnit=H%2Fs&PowerConsumption=44.7&CostPerkWh=0.071&MiningPoolFee=1
Shows a profit of $115 yearly so at $38.50 each one is paid for in four months.
-------------------------------
On the subject of ROI on computer costs here is a breakdown on the three HP DL580 G7's with 20 GTX 750's running in them.
Costs: HP DL580 G7 one at $330, two at $487 for a total of $1304. Twenty GTX 750's at an average cost of $40 totals an additional $800 for a Grand Total of $2104.
There are some other miscellaneous costs (Mining rack, 60GB SSD drives, Power Cables, Xeon E7-8837's) but these will be offset by selling the extra 1200 Watt Power supplies, 192 GB of PC3-10600R Memory, Xeon Processors and Memory Cartridges that came with the DL580's that are not needed. Selling these will actually lower my overall cost.
These three systems are on the Free HiveOS mining Monero at a rate of 9.34 KH/s using 2.49 KW at the wall.
https://www.cryptocompare.com/mining/calculator/xmr?HashingPower=9340&HashingUnit=H%2Fs&PowerConsumption=2490&CostPerkWh=0.071&MiningPoolFee=1
That results in a profit of $4631 yearly so these systems will be paid for in 5.5 months. I have been mining with them for about a month so 4.5 more months to pure profit.
I had to do the following:
1) Type "sudo sysctl -w vm.nr_hugepages=128"
2) Edit "/etc/security/limits.conf"
3) Add "* soft memlock 262144" and "* hard memlock 262144"
4) Change in XMR-STAK "config.txt" to "use_slow_memory : never"
This resolved the issue.
1) Type "sudo sysctl -w vm.nr_hugepages=128"
2) Edit "/etc/security/limits.conf"
3) Add "* soft memlock 262144" and "* hard memlock 262144"
4) Change in XMR-STAK "config.txt" to "use_slow_memory : never"
This resolved the issue.
So... it seems I have to do #1 every time I re-boot as well now.
The other steps are saved but it seems to forget #1 upon re-boot.
SOLVED:
Replace Step #1 as follows:
1) In console go to "/etc" -- type "sudo gedit sysctl.conf" -- add "vm.nr_hugepages=128"
This saves it permanently.
So... not a huge fan of Linux over here, haha... such a PITA.
Thank you for this. I made sure that these steps were done for my R815 Ubuntu miners.
Tried reading through the whole thread...but it's really long
Has anyone found any "cheap" 4U+ rack mount systems that can run 4-7 cards internally?
Has anyone found any "cheap" 4U+ rack mount systems that can run 4-7 cards internally?
Not sure what your idea of cheap is but my idea of cheap is the following:
I would recommend the HP DL580 G7 with the PCIe expansion board installed. Make sure you get it with the PCIe expansion board since that adds six more PCIe slots two of which are x16 slots. Two x16 slots are on the main board. I was lucky enough to purchase one for $330 and the other four at $487.
One of these systems currently has four double slot sized GPUs installed inside. These systems can take full size GPUs.
Purchase the least expensive HP DL580 G7 and replace the processors with four Xeon E7-8837's ($44 on eBay). With these processors you can get about 1560 H/s mining Monero on the CPUs alone.
To power the GPUs you will need some of these cables as the power connectors in the DL580 G7 are proprietary.
See this post: https://bitcointalksearch.org/topic/m.33071070
---------------------------------
I recommend that you go back to page 31 and start reading from there as much more details about the HP DL580 G7 are provided.
---------------------------------
EDIT: 6/2/2018
Be sure to first update the BIOS to the latest version before upgrading the processors to the E7-8837's
Here is the latest BIOS for the DL580 G7 2018.02.22(A)(22 Mar 2018)
https://support.hpe.com/hpsc/swd/public/detail?sp4ts.oid=4142793&swItemId=MTX_0b8f3842a4cd4835b6dd193ee9&swEnvOid=4184
I'm quite interested in this if you decide you want to sell your software.
I've reached out to you a couple of times thinking you might have some interest in being pitched. But I don't plan on releasing any firmwares or selling devices.
Damn... must be in my PMs... I almost never look there. Will check it =)
Yes some people here do have very large budgets but their ideas like using the HP Z400, or the HP DL580 G7's with Xeon E7-8837's, or the Dell R815's with AMD 6200/6300 Opterons are very good ideas in how to build a farm at a much lower cost. My primary GPUs that I mine with are GTX 750's (Nvidia Maxwell) that I buy for less than $40.
Whoa how are 750's profitable? I guess at that low price it would make sense, but seems like it would take forever for ROI just the computer costs.
edit: don't mean to challenge or disagree, i am actually very intrigued by low cost mining options and just curious how you make it profitable.
Tried reading through the whole thread...but it's really long
Has anyone found any "cheap" 4U+ rack mount systems that can run 4-7 cards internally?
Has anyone found any "cheap" 4U+ rack mount systems that can run 4-7 cards internally?
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