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    Changing the hashing algorithm

    Technical Development
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    • T
      tmuir12 Regular Member last edited by

      Try dropping the intensity I am using 11 on my 7870, on I 12 it drops performance by half, and on 14 I would probably only get around 8 too.

      For normal Scrypt I 12 is the sweet spot for me but 11 is required for Neoscrypt

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      • kris_davison
        kris_davison last edited by

        Is there anything special you needed to do to get cgminer working with nvidia?

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        • D
          daimyo last edited by

          Is there anything special you needed to do to get cgminer working with nvidia?

          absolutely nothing… works right outta the box. I am curious to see what a decent desktop nvidia could do

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          • L
            Lukey_p last edited by

            i have a GTX780Ti clocked at 1Ghz i could give a bash?

            Anywhere i should get all the files from? Thanks

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            • kris_davison
              kris_davison last edited by

              ive got three 750ti cards in a rig at home I may have a try and get this miner up and running with them.

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              • Wellenreiter
                Wellenreiter Moderators last edited by

                I have one 750Ti and get about 35khash reported by the miner with default settings, just I=10
                If I set intensity to a higher value, hw errors increase.
                By the way, the pool reports about 24 khash only, but no errors.

                Some hashes ‘lost in transit’? ;)

                Feathercoin development donation address: 6p8u3wtct7uxRGmvWr2xvPxqRzbpbcd82A
                Openpgp key: 0x385C34E77F0D74D7 (at keyserver.ubuntu.com)/fingerprint: C7B4 E9EA 17E1 3D12 07AB 1FDB 385C 34E7 7F0D 74D7

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                • D
                  daimyo last edited by

                  Wellenreiter, do we need external help with the stratum? Do you think it would increase productivity?

                  I can get my 550M to work up to I-13 without HW. -I 12 and -I 13 make little difference tho.

                  I hate to say it but it seems the 7850 has the edge over 750ti productivty wise while at same price… :( Tho I am not sure if lizhi had aggressive overclock or its just too hot in China :D - 86C

                  What temps are you getting with the 750ti ? Have you tried I-13 ?

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                  • lizhi
                    lizhi last edited by

                    I gave it a try last night on my nVidia 550M, Win7 and I got max 8 khs. Mostly default settings, --worksize 256 -I 13, no overclock. Driver version 294.10 - a bit old

                    76C gpu temp -> not bad

                    I think it can reach up to 10 khs with some tweakin

                    This is what i get with -I 14

                    Clipboard01.jpg

                    Limitation of the gpu?

                    And whats the logic 7850 to perform 3 times faster than 7970?

                    Do you guys expect the stratum implementation to raise the productivity significantly?

                    cgminer say “Maximun buffer memory device 0 supports says 536870912”

                    Please reduce the thread-concurrency

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                    • kris_davison
                      kris_davison last edited by

                      750ti are less power hungry tho?

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                      • F
                        Flobdeth Regular Member last edited by

                        does -g 3 -I 17 work, or throwing back HW errors, anyone tried those settings?

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                        • lizhi
                          lizhi last edited by

                          does -g 3 -I 17 work, or throwing back HW errors, anyone tried those settings?

                          -g 1 -I 13

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                          • D
                            daimyo last edited by

                            -g 2, 3 crashes the miner here

                            lizhi, you are correct. High tread concurrency was the cause

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                            • Wellenreiter
                              Wellenreiter Moderators last edited by

                              Wellenreiter, do we need external help with the stratum? Do you think it would increase productivity?

                              I can get my 550M to work up to I-13 without HW. -I 12 and -I 13 make little difference tho.

                              I hate to say it but it seems the 7850 has the edge over 750ti productivty wise while at same price… :( Tho I am not sure if lizhi had aggressive overclock or its just too hot in China :D - 86C

                              What temps are you getting with the 750ti ? Have you tried I-13 ?

                              Help with stratum would be really appreciated. My actual code is on github: https://github.com/wellenreiter01/p2pool-neoscrypt

                              I can add anybody to the repository who want to help.

                              I tested with minerd from Ghostlander and the hash calculated by the pool is always 2 byte too long when using stratum. Longpoll works fine.

                              Didn’t check my GPU temp, as the fans are running low speed it can’t be too high.

                              The NVIDIA cards are slower than the AMD card with opencl based miners.

                              I hope for Cudaminer to be adapted.

                              That should boost the performance of the cards.

                              Feathercoin development donation address: 6p8u3wtct7uxRGmvWr2xvPxqRzbpbcd82A
                              Openpgp key: 0x385C34E77F0D74D7 (at keyserver.ubuntu.com)/fingerprint: C7B4 E9EA 17E1 3D12 07AB 1FDB 385C 34E7 7F0D 74D7

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                              • AmDD
                                AmDD Regular Member last edited by

                                You all keep mentioning Nvidia cards. Is neo better run on those or is AMD still dominant? I ask because I have 3 rigs full of 7950’s that Im holding off on selling to mine feather once the algo is changed. :)

                                I want to setup one on the test pool this weekend if I have time.

                                P2Pool Node: http://104.236.34.9:19327/ 0.5% fee

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                                • kris_davison
                                  kris_davison last edited by

                                  The openCl gpu miner seems to run better on nvidia cards but if/when there is a cudaminer (nvidia specific) they should be pretty even. Nvidia cards generally use less power and are not as hot but you don’t get as high a hashrate so its swings and roundabouts really.

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                                  • D
                                    daimyo last edited by

                                    folks, check this out https://github.com/ahmedbodi/stratum-mining-multialgo it claims to support stratum for neoscrypt

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                                    • Wellenreiter
                                      Wellenreiter Moderators last edited by

                                      unfortunately this can’t be adapted easily to p2pool.

                                      Feathercoin development donation address: 6p8u3wtct7uxRGmvWr2xvPxqRzbpbcd82A
                                      Openpgp key: 0x385C34E77F0D74D7 (at keyserver.ubuntu.com)/fingerprint: C7B4 E9EA 17E1 3D12 07AB 1FDB 385C 34E7 7F0D 74D7

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                                      • E
                                        Edosterman last edited by

                                        Where is the source for this. Love to help.

                                        I have a bunch of GPS’s i can throw at this.

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                                        • E
                                          Edosterman last edited by

                                          that would be GPUs not GPSs

                                          sigh

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                                          • E
                                            Edosterman last edited by

                                            folks, check this out https://github.com/ahmedbodi/stratum-mining-multialgo it claims to support stratum for neoscrypt

                                            this has not been modified in months

                                            only looks like cpu neoscyrpt at best.

                                            other cpu miners available if wanted .

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