It's pretty easy.  The SAS power connector has 10 pins.  5 commons / grounds (black).  3 12V (red) and 2 3V (yellow). 

Assuming your cards only need 1 power connector, you are talking a total of 13 power connectors if 3 cars are installed in the system and 5 are on risers.  If the GPU connectors have 2 each on 3 cables that's 6.  You'll get another two out of the SAS connector.  Leaves you short 5 power connectors unless you are going to use splitters.

I've been successful increasing density on my breakout boards by using molex powered risers that I can power three off one pcie power header.  The pcie power header has 3 + and 3 negative at 12V.  Each gets a 12v to 5v step down and then are passed to a molex plug.  In essence I've turned one of the breakout board power connectors into 3 functioning molex connectors that will drive 3 risers saving 2 of pcie power connectors.


Since it's quad CPU the DL580s are running Server 2016.  However, the 4 GPU limitation I have experienced on both Server 2016 AND Win10.  The DL360s and 380s run 10 since they are only dual proc.

Under Linux, I have 6 Nvidia cards working.  Not sure what is up with the Proliant G7 series.  I have tried a DL360, DL380 and the DL580 and none of these will boot with more than 4 GPUs installed.  Windows will lock up at loading screen.

Slap a USB stick with HiveOS on it and 6 get recognized easily.

I have a ML350P G8 that has taken 6 GPUs in windows easily.  

Edit* Make that 9 1060s in one 580 in HiveOS.

I'm using Sandisk USB 3.0 16MB sticks with no problems so far.  I did have a few issues early on with some cheap no name sticks.

The R815's, while power hogs are work horses.  They just plug away like nothing is wrong and require minimal baby sitting.

I'm having an issue getting more than 4 cards working on the 580s under Windows.  Two separate boxes lock up with 5 Nvidia cards connected.  I will try hive OS next.

http://www.cointainer.life/2018/02/22/density-electrical-101/

That should answer all your electrical questions.

If the funds were already sent, you are screwed.  If the funds are pending and not yet initiated, he "could" maybe help you.

And as profitability goes up, the diff will too as everyone floods it.  It's exactly what happened to Haven.  For a moment in time there, 1KH/s was $20/day on Haven!

Hrm seemed to have missed a question back there.  It's been a crazy last week.

The 8837's are doing anywhere from 1500-1650H/s depending on how loaded with GPUs the box is.  I've found I'm getting consistently better hash rates on GPUs and CPUs by killing a thread or two on the CPU side.

I'll have to check the SAS firmware, maybe I just turned off the OSD for it.

Haven was real sweet for about a day after their hard fork.  Now not so much.  The ASIC wars are going to be interesting in the cryptonight space.

Pool shouldn't matter.  I have only used the xmr-stak-haven and I've compiled it myself under linux.

Working for me.

I've been able to optimize my quad Opterons.  Hit is JUST over 50%.  2120H/s down to 1045H/s.

Heavy is basically 2x memory over CN so now L2/L3 is divisible by FOUR for max efficiency. 

It's "losing" when device A got B and device X got Y.  When the ratio between B and Y is not equal, it's a loss is it not?  CPUs have become less efficient and have LOST to GPUs even more so than they already had with the new algo in place.

Also, the auto config for CPU is no longer optimal in xmr-stak, at least not for quad Opterons.  It will get me 500H/s and my old config does ~900H/s.  I will try to hand tune to see if there is any other gains to me made.

Has anyone noticed that the majority of the hashrate is from devices not on the listed pools?  Add up all the hashrate from the various listed pools and it doesn't even account for 25% of the overall network currently.  

There is a reason it's called cryptonight heavy.  If you are only losing 33% be glad.  MY quad Opteron servers went from over 2100H/s to under 900!  Almost a 60% loss!

You can turn of the P410i controller in the firmware and it will decrease boot time.

You technically don't need the micro SATA adapter.  If your box came w/ the optical drive and cable, you can actually cut the connector in half to separate the data from the power.  That was my solution on box #1 due to THIS BOX MUST RUN NOW syndrome...

I've stopped spending money at this moment in time.  I'm pushing harder to learn trading.  More reward for less effort.  I have plenty of chassis' to add GPUs so I will continue to do that but no more CPU rigs for me at this time. 

Eventually all my rigs will turn to speculation only.

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.

I never had a problem w/ linux and XMR-Stak w/ the 8837's.  The default auto config for me worked right out the box.  I do think hwloc ends up putting the double memory ones up first though.

I've had a hell of a time with XMRig and that's because it doesn't support NUMA.

Looks great Spinx!

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. 

I did a lot of wiring modification for the 580s.  First, I've only got 4 GPUs running per box at the moment.  I haven't tried more because all my 580s are powering cards from the onboard supplies.  I did learn how to rewire things to make use of the 10 pin ATX connectors.  At first I was using 8 pin connectors from some modular PSU's but I ended up buying connectors and making them proper.

I never noticed an additional header for an SSD drive but I have modified the SATA connector cable for the optical drive to run either SSD or regular drive.  The connector on the board is called a micro SATA connector.  The data part is the same but the power portion is smaller and only provides 5V.  It's fine for SSD's or optical drives but not sufficient for a regular HDD.  If you don't have the blue cable for the optical drive that you can modify, you can pick what you need here: https://www.frys.com/product/6245160?source=google&gclid=CjwKCAjw7tfVBRB0EiwAiSYGM_I81IahE32ryxjsklOTzYfuJuGTa3UX-TpjxvYdzcIjislS1UaiLhoCP3AQAvD_BwE

HOWEVER, I HAVE SINCE MOVED TO JUST USING THE OEM DRIVES.  The power savings is not even 10w when you convert to SSD.  It's not worth the expense.  If the hot swap 10k SAS drives are there, just use them.  (This will rob you of an additional power connector you could use for GPUs)  I repurporsed the SAS power connector to drive GPUs on the first two boxes, but not on any others.

DL580 prices are starting to rise.  I was scoring them for under $300 each.  I should shut my mouth.    This is probably why Sundownz doesn't wanna talk to me, sees me as competition when I just wanna be fwiends and work together!

I'll probably add some tech write ups on DL580 conversions and add them to my site.  I rather add content there than here.  

Almost all PSU's, as long as they aren't junk, can operate between 100v-240v.  Yes I'm currently running all those HP supplies at 240v, in fact, anything that CAN run at 240v IS.  Read my article about being electrically dense on my site to understand why I am, and why I think Sundownz's electrical guys didn't do him any favors when they but in that big electrical panel with all those 110v circuits for all his R815's.

MinerRus, would that ebay vendor be garlandcomputers?  They are local to me I tried to pickup everything they had for $300 a piece but they wouldn't do it.  I see they just canceled an auction they had for another that should have ended in a day or two and have put everything on buy it nows for much more money.  Greedy bastards... lol

Someone just bought a set of 10 8837 CPUs.  I bet they read this thread. 

I wrote a lengthy article about my journey into the E7 world of xeon's here:

http://www.cointainer.life/2018/03/10/say-l3-cache-king/