Yes garlandcomputers is where I purchased my DL580's. I am local also. The last auction that sold for $305 was me I guess your bid was the $300 one just below me. 

I guess me asking the same thing to buy five of them at $300 each along with you asking before and only having two auctions sell for higher price than what I paid must have ticked them off which is why they canceled the auction.

This is their exact words:

I'll have to think about that, but probably no.
We are losing money on all of these and we can sell the parts for way more than the units are selling for.
So I have taken these down.

This response was on the $449 BIN auction and I interpreted that to mean that they may be also taking down the $449 BIN auction which is why I bought two of them at that price. I need somewhere to put those E7-8837's I picked up. These ended up costing me $107 more each vs the $305 on the first one since I did snag the $100 in eBay Bucks.

I really seems strange that they have five HP DL580 G7's at BIN prices of $450, $795, $1040, $1050 and $1270 and the only differences is that some have E7-4870 processors, 300GB drives instead of 146GB and more memory. The price increases seem unjustified for what was added or changed.

https://www.ebay.com/sch/garlandcomputer/m.html?item=372242649073&ssPageName=STRK%3AMEBIDX%3AIT&_from=R40&_sacat=0&_sop=15&Product%2520Line=ProLiant%2520DL&_nkw=dl580%20g7&rt=nc&_trksid=p2046732.m1684

You northern DFW or southern DFW?

The biggest difference I saw in their boxes was amount of memory for the price changes.

If you want the R815's, I've secured a very good deal from the same Co that Sundownz got them from who is also local to both of us.  DM me for info, I'm not going to put everything out there anymore. 

Super Weird issue I would like to share...

I use Rosewill PSUs in all my stuff... very happy with them, especially QUARK series.

I ran into a strange incompatibility... the QUARK-850 will *NOT* work with more than one Gigabyte Aorus 1080Ti.

THREE separate yet otherwise identical Z400 systems... 1x 1060 2x 1080Ti Aorus -- three different Quark-850 PSUs... system will run for like 5 minutes and re-boot. I replaced with Rosewill PHOTON-850 and all three systems are flawless for ~2 weeks so far.

My fourth Z400 with this type setup... just MSI 1080Ti (every other part the same)... totally stable with a QUARK-850 in place.

I figured... maybe a bad run of luck and I had three DOA supplies. Nope. I put those three QUARK-850 PSUs into other systems and they all perform perfectly even using the same or more wattage.

In case anyone else may be trying this & pulling their hair out, haha... figured I would share.

An 850w PSU with 6x 6+2pin connectors, 2 on each cable.  1080Ti has a 250tdp... are you running neoscrypt perchance?  That would definitely run well over 250 per card.
Must be overloading either the PCI-e power cables or something internal. As it heats up, a conductor won't conduct as well, so it draws more current to compensate, heats up more, etc, and that is when it stops.

I generally try not to put more than 80% load on a PSU... can get away with using Bronze 80+ PSUs that way.  (still need quality brands)
I am very impressed with the Rosewill Hive 1000w bronze 80+ PSUs I have. I was running 3x Vega FE (tdp=300w) on one machine, in the winter, before I realized it was running at just over 100% load!!  It would run for 2 or 3 days, but no way a PSU at 100% load can be stable for long, it just takes a little rise in ambient temperature and it will flake out.  But I have to give Rosewill credit, those $78 PSUs work like champs!
Just my personal preference, I like Antec, EVGA, FSP, and Corsair PSUs. Rosewill is my new favorite Value brand, but they started getting pricey too recently. Thermaltake is rubbish in my experience.  

Great discussions and info in this thread!

Just wanted to share my DL580 G7 build, wanted to run 11 cards, but settled with 9 after hours and hours of struggle.

Mining etherium at ~ 255MH/s. Ran Cryptonight at 1650H/s with 4x E7-8837, but stopped since i switch to SimpleMiner from hiveOS (had to prioritize gpu stability).

More pics here: https://imgur.com/a/NzYLC

Nice system.

I am trying Hive OS on my DL580 G7 with 4x E7-4830's and 4x GTX 750. It is up and running but something must be wrong with my configuration for the CPUs. I am getting some affinity errors on a few CPU cores and those cores only produce 11 H/s instead of the 33 H/s on cores where affinity works. I have disabled hyper-threading in the BIOS so the 32 cores shown are real CPU cores.

Could you post the CPU configuration that you used with Hive OS. Hopefully that will fix my problem.

Also is the rack that the DL580 and GPUs are mounted in a commercial rack or home made?

If home made can you provide assembly instructions.

Thanks

Thanks for the link. Your settings and mine were the same so after further investigation I found what the major problem that was causing the affinity errors and lower than expected hash rates.

Hive OS (and probably Linux in general) assigns 10 cores to each processor from the E7-4800 and E7-8800 family. So Processor #0 has cores 0 - 9, Processor #1 has Cores 10 - 19, Processor #2 has Cores 20 - 29, and Processor #3 has Cores 10 - 39. I was very confused in why mpstat -P ALL showed 40 cores even though the 4x E7-4830 (with HT disabled) only had 32 (4x 8 cores). It turns out that Linux disables two of the cores in each set of 10 for the 8-core processors. The two cores disabled are not at the end but core #4 & #5 from each group. If you have 6-core processors two more cores would be disabled.

So your configuration from the link above and what I was using would try to use non-existent cores (which caused the affinity errors) and would run more threads on some processors than what we thought and less on other processors. That is why I saw hashes of 11.5 instead of 33.5 that I was expecting.

This is the correct CPU threads table for 8-core E7-4800's and E7-8800's (including the E7-8837):

"cpu_threads_conf" :
   [
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 1  },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 2  },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 3  },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 6  },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 7  },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 8  },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 9  },

        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 10 },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 11 },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 12 },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 13 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 16 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 17 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 18 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 19 },

        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 20 },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 21 },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 22 },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 23 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 26 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 27 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 28 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 29 },

        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 30 },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 31 },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 32 },
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 33 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 36 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 37 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 38 },
        { "low_power_mode" : true,  "no_prefetch" : true, "affine_to_cpu" : 39 },
   ],

Using this the "affinity errors" went away and my overall CPU hash rate went from 1038 H/s to 1358 Hs for the processors. A 31% increase with no additional power used.

With 4x GTX 750's I am now hashing at 2250 H/s.

NOTE: the above configuration does not use Processor #0 Core #0 because I have that affined to from the Nvidia configuration file. If you have no GPU's then you can add this:
        { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 0  },
to the top of the config file for extra hashes.

--------------------------

EDIT: 04/08/2018

Well the above worked on Rig #1 but when I brought up Rig #2 I again had affinity errors on 4 of the cores.

Can I say Linux really really sucks because it really really does.

Even though both Rigs are EXACTLY the same Linux disables different 2 cores out of the 10 that it uses on each of the 8 physical cores of the E7-8837.

On Rig #1 of the 40 cores Linux defines it disables core # 4, 5 on Processor #0, cores #14, 15 on Processor #1, cores #24, 25 on Processor #2 and cores #34, 35 On Processor #3

But on Rig #2 it does this: disables core # 1, 8 on Processor #0, cores #11, 18 on Processor #1, cores #24, 25 on Processor #2 and cores #34, 35 On Processor #3

That means that the custom XMR CPU configuration that I set in HiveOS cannot be used because what worked on Rig #1 fails on Rig #2 and more that likely on my future Rig #3.

So those who are using HiveOS and XMR-Stak do not use any overrides in the XMR CPU configuration in HiveOS just let XMR-Stak auto-generate it.

EDIT: 04/26/2018

The above issues of dummy cores has been solved with HiveOS going to Linux Kernel 4.13. mpstat -P ALL now shows the correct 32 cores.

So what is the hash rate you are getting for the 4x E7-8837's?

Also on the DL580 G7 I removed four of the memory cartridges and now only run with one cartridge per processor. I also changed the two 4GB PC3-10600R memory to two 2GB PC3-8500R memory in each of those four cartridges.

The system now has 16GB total memory and generates the same hash rate. However the system now uses 120 watts less. So that means that each memory cartridge uses 30 watts.

You can also use regular 8 pin modular PSU cables (or even cheaper breakout board harnesses, I got 50 for $89 shipped) as well if you have them laying around, you just have to swap two pins.  They still lock, you just leave the two 3.3v pins unused.  I have one box on 2 internal PSU's that is running 3x1080 and a 1060 6gb all off the 4 internal power ports (repurposed SAS connector as well) and crunching 1650H/s on all 4 cpu's.  2 of the cards are installed inside and two of them are on risers.

One GPU power header on the 580 can drive TWO 1060s.

If you want to run a regular HDD but eliminate the SAS array, just use a 12v to 5v converter on one of the 12v lines from the SAS connector so you can power a regular drive.