Topic: Building Cheap Miners : My "Secret" - page 22. (Read 60235 times)

Also, MinersRus, you might toss those CPUs in and the box won't boot.  If that's the case, you need to go snag a torrent or two.  All HP's BIOS stuff is locked behind a paywall but the firmware DVD and SPP DVD's are available via torrent.

Default BIOS setting is with HT Assist on, which explains your 12MB L3.

Are you still using 64T?  At 12MB, my boxes are running 56T with some at 2x memory.  64T was significantly slower.

I've gutted all my boxes to 16gb of udimms.  This has saved 50w at a performance penalty of about 30-40H/s.  It also allowed me to sell the bigger more expensive memory.

Minerus:  Protip:  Best CPU's you can get for the 580 series is the 8837.  I had a set of the E7-4870s and they performed worse than the 8837's and I tried EVERYTHING.  You won't be happy w/ the 4830's, I think you'll top out around 1000H/s.  I hope you are going to be adding GPUs to the box or it will just barely pay for it's own electricity.  The X series of CPUs aren't even worth trying to resell, they have become targets for practice at 100y.  

Download Ubuntu 16.04.  Install, it's a no brainer.  Then just search xmr-stak install ubuntu and you'll find several guides that walk you through it.  By now I have it memorized and should have just used a docker...

I racked out for another 20 R815's but I'm going to HODL at the 8 I've got going for now.  Their ROI has taken a big shit ATM and they cost me $1.25 each a day to run basically even w/ my energy costs at .08/kwh.

I'm sure Sundownz has done something similar to what I did and bought an X3 or in his case, ten...

I have not checked that setting directly but I do believe my CPUs are reporting 12 MB.

I like to use CPU World (http://www.cpu-world.com) to check on both Intel and AMD processors specs and features.

I like the family major features. The following link clearly shows that the E7-4800 family has the AES instruction and it also has links to all of the Production microprocessors which you can filter by values like number of cores:

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

The Detailed side-by-side comparison feature is also cool:

http://www.cpu-world.com/Compare/935/Intel_Xeon_E7-4830_vs_Intel_Xeon_X7560.html

I just purchased a HP DL 580 G7 system with quad Xeon X7560 processors. I will be swapping out the four X7560 Xeons with four E7-4830 Xeons that have the AES instruction.

However I need help with a suggested Linux install and with getting XMR-Stak (for both CPU and GPU) to run on Linux.

All of my miners to date have been Windows 7 & 10 installs.

PharmEcis and Sundownz I see that you have Dell 815's mining on quad processors any help or advice is appreciated.

Thank you much. I didn't even know this was a thing!

Sundownz,

Are you running the R815's with HT Assist turned on or off in the bios?  With it on, the cpu's only report 12mb of L3 and with it off they report 16mb.  I've seen better speeds with the lower l3.  How about you?

https://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_nkw=GENUINE+WINDOWS+10+PRO+PROFESSIONAL&_sop=15

Interesting build.


Where are you finding this price?

For those who have picked up Z400's this may be another option.

I picked up four of the following servers on eBay

SuperMicro Storage Server 24 Bay 2026TT-DLRF 2x X8DTT-HEF+ CSE-217
https://www.ebay.com/itm/192395848816?ViewItem=&item=192395848816

I paid $274 total for all four or $68.50 each.

These do not come with processors, memory, heat sinks or power supplies.

These systems have two independent dual processor servers in one case. Each of those independent servers can take dual Xeon 5600 series processors. So each SuperMicro Storage Server 2026TT-DLRF will have four processors.

I purchased a set of six heat sinks for $48.71 or $34.47 for set of four for one of the SuperMicro Storage Servers.
https://www.ebay.com/itm/312081078444

That raised the price for one server to $102.97.

I am picking up locally four other complete "SuperMicro Storage Server 24 Bay 2026TT-DLRF" that have dual 1400 watt power supplies. Since they will run with only one installed (the 2nd is for redundancy) I will use the spare ones to power the four above servers.

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The following items are zero cost to me as they were leftovers from me buying and selling parts stripped from computer workstations and servers. I made a profit on selling those parts:

a bunch of PC3-10600R 4GB memory
four Xeon E5645 hex core processors

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The current price is $8.30 for two Windows 10 Pro digital licenses.

So my total price for one of these servers is $111.27.

These servers also come with the "Dual Slot PCIe x8 Riser Card PN:RSC-R2UT-2E8R" so I can install four single slot (or two dual slot) GPUs for additional hashing in each system.

A feature on Supermicro servers is that you can set the fans to economy mode and they are much quieter than traditional servers.

Over time I will purchase faster processors and more heat sinks to fill out the remaining systems.

I will post results when I get these systems running.

You know we could be working together on things like this, I don't have the power you have, but I'm pulling over 13kwh now so that should gives you a rough idea of what I can bring to the table.

I'm still not sure why you choose to ignore me.  I'm a team player!

Still messing around with the Dell R815 systems  -- getting a bit more creative since the whole market is crap right now.

I had taken them off ITNS and switched to Cryptonight on NiceHash for a bit as alts fell hard... now that isn't really worth it so my next stage...

YescryptR16 on ZergPool seems like my best bet at this  moment... 4  kH per system... assuming 0.100 mBTC/kH/Day that makes $3.32 / Day at $8315 Bitcoin... but I figure on average ~$2.50 / Day compared with $1.86 on NiceHash right now for CryptoNight.

When I add my hash power, though, I will be tripling (or more) the hashrate of YescryptR16 on Zergpool so I hope for a bit more / towards the higher end.

Thank you, I found it in my local store 

Just upgraded my Z400 mining rig's CPU to X5650, mining IntenseCoin at 250H/s 

Thanks for all the answers to the gen1 pci-e question.

Knowing that is possible to run 4, even 6 gpu's on the z400, I will do more tests to find what is the cause that makes the system to crash after some hours.

Thanks.

I have used two types -- this type I've had in operation the longest:

https://www.amazon.com/gp/product/B073W9KCFC/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

I use the bottom PCI-E slot for a video card -- just like the 4 card systems -- and the top two slots for one splitter each (two cards per splitter) -- and the third slot down has the riser plugged right into it.

I can get a few pics if you need.

What splitters are you using on that system? and link to buy  

Mine are 4x GTX 1070, all 4 risers, no problems  

https://image.ibb.co/dfSG4c/IMG_6725.jpg

I have not had any issues using all four slots on the Z400s with GPUs.

A large portion of my systems are 4x Geforce 1060 -- with one card in the bottom x16 slot and risers on the other three. As pictured:





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The splitters also do seem to work fine as I have a few systems with 6x 1060 or 1x 1060 / 5x 1050Ti using splitters.

Hi All.

I would like to ask a question about Z400, I have two rigs based on the z400, the first one is a 3x1070 the second one is a 3x1060. I've started with 3 gpu's per rig because just 3 pci-e slots are gen2. Now I want to use the 4th pci-e slot whch is a gen1 pci-e, but I'm getting problems.

The tow rigs on a setup of 3xgpus were mining rock solid for 1 month. Now I've tested to add a 4th card on the 1070gtx rig, the rig crashes after 2-3 hours of mining activity, I've reinstalled nvidia drivers and almost all the software, tested with different miners, and I'm always getting the same problem.

At the beginning of my build I get problems also when I was using the gen1 pci-e so I would like to ask for help because with all the profits going down I want to increase density on this two rigs, so any one found this problems in Z400 workstations and have you found a solution?. Or maybe is better to buy a 4x or 2x pcie multiplier to connect 2 gpu's on every pci-e gen2 slot?

The psu is a 900w modular psu, with enough cabling to wire the gpus and the risers, so I've discard also a problem with the psu. Any help will be appreciated.

Thanks in advance.

The currently proposed PoW changes wont break this miner if it's FPGA based. It'll require a slight change and recompile of the code. that's it. Same if it's movidius VPU based.

Those miners have been in use for months now by Baikal themselves...  They know the forks are coming so they are dumping the HW to recoup costs and all the mining is profit.  If you've been paying attention to things in the Cryptonight world, there has been a lot of complaints of "nicehash" pumping coins...  10:1 says that all the massive network spikes on various coins wasn't Nicehash but these miners.