Topic: CCminer(SP-MOD) Modded NVIDIA Maxwell / Pascal kernels. - page 690. (Read 2347641 times)

ON MY 2X  2 CORE RIGS  NEVER ON MY 2X 4 CORE.

PROS AND CONS OF LINUX--

Linux is a more difficult OS for some, normally you must learn the compilation process for a piece of mining software.  Windows generally is easier to operate, but often does things "on its own"; there is less control at times.  The code author sp_ writes software for Windows, and his private mining software is generally released pre-compiled for Windows.  He has his critics, but produces fast mining software.

All my rigs are Linux, save one single-card working rig that I do work on besides mining.  It is Win 7 x64 (recommended).  I like to compile and run from source code.  Linux is very stable when properly set up and maintained.  I have several Linux rigs that run for a month at a time unattended.  Ubuntu 14.04.xx is recommended for Linux, and Lubuntu 14.04.xx is recommended for very small (16-32GB) drives.  Lubuntu is my choice for a stable, unattended, headless rig.  A miner can run Lubuntu on a 8-16GB USB stick or SSD drive.  There is no licence fee for Linux.  I compile sp_ 's public releases on Linux and it is relatively easy.  

If you want to mine ETH with a 750ti, you need Linux, because of memory problems on Windows.  There are 4GB 750ti cards out there, but not many mining reports regarding their use with ETH.  On Linux, a 2GB 750ti will mine at 4MH/s and that is only 50% efficiency. Personally, I wish someone would put together a 4GB 750ti rig, mine ETH at 8MH/s, and report it.  Actually, most miners will not mine ETH with a 750ti.  I currently miine FeatherCoin (FTC) with my 750ti rig.  Ethminer software for CUDA is maintained by Genoil.

A 6-card 750ti rig can run with no problem on a 750W Bronze or better quality PSU.  This gives ample extra power.  A 600W Gold PSU is good enough, but may be pressed by the most powerful 750ti cards (6 of them).

That is the simple start.       --scryptr

Thanks Scrypter,  I am building a 6 gpu 750ti rig myself.  Sounds like you have that running well on Linux?  Which miner are you using?  I have a Asrock Intel mobo, i3 cpu and trying to figure out the best way to get the most out of these 750ti's that I just bought for this rig.  Any feedback would be awesome.  I was looking at the SP-MOD's and it looked like SP_ is getting some of the best hash rates out of the Maxwell cards.  So that is why I posted here looking for input.  Are there any pros or cons to Linux vs Windows for these rigs?  Thanks again!

DUAL PSU MAY CAUSE POWER BACKFEED--

Which will lead to crashing on high-power rigs.  I have also heard that an Intel motherboard is better for 6 GPUs than an AMD motherboard.  The 6 GPU rig is possible, but there are more experienced minds than mine.  My 6 750ti rig is rock solid, but more powerful rigs may be difficult.  My 6 750ti cards run on linux, with a dual core bargain AMD CPU.  With an identical set of hardware, 5 GTX 960 cards + 1 750ti were never stable, even with a bigger 1000W PSU.  I tried Win 7 and Linux, and now run linux with 5 GTX 960 cards with the same single 1000W PSU.

Wish I could help more.       --scryptr

Thanks for the info SP_,  I thought I read somewhere that there was an issue with Win 7 and 6 gpu rigs?  Are you aware of such a limitation?  So Win 7 or Win 8?  You have a preference as far as getting these rigs running?  Thanks.

I forgot something. Version #4 is faster on the 750ti since it has 2 exe files. One tuned for compute 5.0 and one for 5.2

What hashrates are you getting?

@sp could u send me private 5 again. All algo's at least %10 worser then this in my miner.

It could be a riser problem. What motherboard do you have? It could be a fuse/cable problem how many rigs are connected to the same fuse.It could be a faulthy card. It could be a driver problem.( old drivers can crash on newer cards, and some of the newest drivers have issues too)

This has been going on since the first time you started saying, set intensity, on the thread 5 months ago.

1x 750ti 2 980ti  1x 970 gtx soon to be 2x 970gtx

And I went through all that for a whole day. The only thing that works 90% of the time is  no oc'ing no intensities no nothing but stock.
I found the intensity that seemed to work cut my hashrate in half.

16gig is Enough..
 Can you try with  lower intensities? Use -X 10 , -X 11, -X 12... What is the highest that works?

Ccminer -a qubit --benchmark -X 10

Its at 16 gig should I add more... set that a long time ago.

Are you using gtx 950 or gtx 960 cards?

Defauls intensity qubit:

Gtx 970,980,980ti: -X 24
Gtx 750 ti: -X 12
Gtx 750: -X 10
Gtx 950,960: -X 23


                if (strstr(props.name, "970"))
      {
         intensity = 256 * 256 * 24;
      }
      else if (strstr(props.name, "980"))
      {
         intensity = 256 * 256 * 24;
      }
      else if (strstr(props.name, "750 Ti"))
      {
         intensity = 256 * 256 * 12;
      }
      else if (strstr(props.name, "750"))
      {
         intensity = 256 * 256 * 10;
      }
      else if (strstr(props.name, "960"))
      {
         intensity = 256 * 256 * 23;
      }
      else if (strstr(props.name, "950"))
      {
         intensity = 256 * 256 * 23;
      }
      throughput = device_intensity(device_map[thr_id], __func__, intensity);

K reading thanks.
EDIT:I already did that but looking again.
ps lower the intensity on the next build...

Google it

http://www.tech-recipes.com/rx/36092/windows-7-and-8-change-the-size-of-virtual-memory/

I have them maxed out with Hyperx 16 gig.... what exactly do you mean by adding virtual memory and how to do it plz?

Compute 6.0 will probobly need some re-tuning. A new instructionset? Or just the maxwell shrinked to 16nm..

750ti cards have a coreclock of around 1100-1400 and the hashrate depends on the clock.

Optimal settings(oc) (core of around 1390)

Quark: 7mhash
Qubit: 5mhash
Lyra2v2: 5.3 mhash
X11: 3.45mhash
X13:2.6mhash
X15:2.4Mhash
Lyra2re: 1.2mhash
Neoscrypt: 240mhash (cuda 6.5 build)
Decred: 640mhash
Vcash: 1000mhash
Pentablake:32 mhash

The algos use from 40-60 watt per card if you have a platinum powersupply. You can run a 6x 750ti rig on a 500w psu, but I recomend 700+. To get the best hashrates you need to increase the tdp of your card from 38w to 65w. In the Bios or use the nvsmi tool


I normally don't release linux versions, only windows. But the decred and vcash sourcecode is available for a extra fee

I am in the process of building a 6 gpu rig with some 750ti's.  SP_ can you tell me what your hash rates are for the various algo's with your private builds?  I would love to get an idea where I can get the best bang for my buck with these 750ti's and CCminer.  The current plan is to use Linux, but looking for recommendations on the OS.  Is there a preference on which Linux distro works best for CCminer?  I see in the last few posts something about going with more memory for the 6 gpu rigs.  I bought 8gb, but sounds like I should get 8gb more?  Anything else I need to optimize the rig?  It will be running an i3 Haswell cpu, 128gb SSD, 1000w EVGA Platinum P2 psu, 6 Gigabyte GTX 750ti's.  Thoughts and feedback would be great on how to make these cards sing in this rig.  I am leaning toward Neoscrypt at the moment for this rig, but I would love to have some hash rates, and power consumption figures so I can do the comparisons.  Thanks!