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    Burned out molex -\> PCIe cable

    Mining
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    • M
      Myerss last edited by

      Dammit, my Molex cable melted that was connected to PCIe adapters… machine offline… How do you guys manage to run five cards in a rig? Do you use Dual PSUs or some 14-1600watt ? In case of duals how do you make them work together in one rig?

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      • S
        svennand Regular Member last edited by

        [quote name=“Myerss” post=“30811” timestamp=“1381355165”]
        Dammit, my Molex cable melted that was connected to PCIe adapters… machine offline… How do you guys manage to run five cards in a rig? Do you use Dual PSUs or some 14-1600watt ? In case of duals how do you make them work together in one rig?
        [/quote]

        I just keep it at 4x card pr rig=)
        And i have experienced the same with 4x 7970. dont quite know why it has happen though. guess theres to much powerdraw on a single lead or something.

        I just lick my wounds and replace that cable ;)

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        • N
          Nutnut Regular Member last edited by

          [quote name=“Myerss” post=“30811” timestamp=“1381355165”]
          Dammit, my Molex cable melted that was connected to PCIe adapters… machine offline… How do you guys manage to run five cards in a rig? Do you use Dual PSUs or some 14-1600watt ? In case of duals how do you make them work together in one rig?
          [/quote]

          With those adapter you MUST make sure that you connect each connector to a completely separate cable from the PSU. 300Watt on a single molex will defo melt it.

          1 Reply Last reply Reply Quote 0
          • M
            Myerss last edited by

            ;D It sure did :) well well … btw how do you get past 730Kh/s on xubuntu with them Gigabytes 7970

            With these settings i get 730 and can´t get engine above 1040 or the hashrate drops.
            Ran the same cards on windows 7 before and they where upp to 770Kh/s stable with eng/mem 1100/1500

            TC is scrypt130511Tahitiglg2tc10240w256l8.bin

            Ignore the first card, runs to hot so i found a sweet spot @ 963/1220 = 680Kh/s and 863/1220 = 610Kh/s

            [code]“intensity” : “13,13,13,13”,
            “vectors” : “1,1,1,1”,
            “worksize” : “256,256,256,256”,
            “kernel” : “scrypt,scrypt,scrypt,scrypt”,
            “lookup-gap” : “2,2,2,2”,
            “thread-concurrency” : “0,0,0,0”,
            “shaders” : “2048,2048,2048,2048”,
            “gpu-engine” : “863,1040,1040,1040”,
            “gpu-fan” : “85-95,85-95,85-95,85-95”,
            “gpu-memclock” : “1220,1500,1500,1500”,
            “gpu-memdiff” : “0,0,0,0”,
            “gpu-powertune” : “0,0,0,0”,
            “gpu-vddc” : “0.000,0.000,0.000,0.000”,
            “temp-cutoff” : “95”,
            “temp-overheat” : “85,85,85,85”,
            “temp-target” : “75,75,75,75”,
            “auto-fan” : true,
            “api-mcast-port” : “4028”,
            “api-port” : “4028”,
            “expiry” : “120”,
            “gpu-dyninterval” : “7”,
            “gpu-platform” : “0”,
            “gpu-threads” : “2”,
            “failover-only” : true,
            “hotplug” : “5”,
            “log” : “5”,
            “no-pool-disable” : true,
            “queue” : “0”,
            “scan-time” : “30”,
            “scrypt” : true,
            “temp-hysteresis” : “3”,
            “shares” : “0”,
            “kernel-path” : “/usr/local/bin”
            [/code]

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            • N
              Nutnut Regular Member last edited by

              [quote name=“Myerss” post=“30818” timestamp=“1381360100”]
              ;D It sure did :) well well … btw how do you get past 730Kh/s on xubuntu with them Gigabytes 7970

              With these settings i get 730 and can´t get engine above 1040 or the hashrate drops.
              Ran the same cards on windows 7 before and they where upp to 770Kh/s stable with eng/mem 1100/1500

              TC is scrypt130511Tahitiglg2tc10240w256l8.bin

              Ignore the first card, runs to hot so i found a sweet spot @ 963/1220 = 680Kh/s and 863/1220 = 610Kh/s

              [code]“intensity” : “13,13,13,13”,
              “vectors” : “1,1,1,1”,
              “worksize” : “256,256,256,256”,
              “kernel” : “scrypt,scrypt,scrypt,scrypt”,
              “lookup-gap” : “2,2,2,2”,
              “thread-concurrency” : “0,0,0,0”,
              “shaders” : “2048,2048,2048,2048”,
              “gpu-engine” : “863,1040,1040,1040”,
              “gpu-fan” : “85-95,85-95,85-95,85-95”,
              “gpu-memclock” : “1220,1500,1500,1500”,
              “gpu-memdiff” : “0,0,0,0”,
              “gpu-powertune” : “0,0,0,0”,
              “gpu-vddc” : “0.000,0.000,0.000,0.000”,
              “temp-cutoff” : “95”,
              “temp-overheat” : “85,85,85,85”,
              “temp-target” : “75,75,75,75”,
              “auto-fan” : true,
              “api-mcast-port” : “4028”,
              “api-port” : “4028”,
              “expiry” : “120”,
              “gpu-dyninterval” : “7”,
              “gpu-platform” : “0”,
              “gpu-threads” : “2”,
              “failover-only” : true,
              “hotplug” : “5”,
              “log” : “5”,
              “no-pool-disable” : true,
              “queue” : “0”,
              “scan-time” : “30”,
              “scrypt” : true,
              “temp-hysteresis” : “3”,
              “shares” : “0”,
              “kernel-path” : “/usr/local/bin”
              [/code]
              [/quote]

              tc 8192. sometimes more is less! ;)

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              • M
                Myerss last edited by

                Thank you, but no joy, 8192 gives me 720@1040/1500 and everything above makes it drop. Xubuntu 13.4, AMD 13.4, cgminer 3.5.0

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                • S
                  svennand Regular Member last edited by

                  The ratio of gpu/memory speed seems a bit of.

                  1500mhz is perfect for 1080 processor core speed. maybe try to go down on the memspeed?

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                  • N
                    Nutnut Regular Member last edited by

                    yeah - i run 1080/1500. If it’s a particularly cool day an i’m feeling a bit rebelious i’ll push 1100/1500 which pushes me to ~765.

                    Stability not an issue at 1080/1500 either - i grabbed the below screen shot just now… Miner started on the 29th September (i do zero the counter after a block find though)…

                    here’s my startup…

                    [code]screen -dmS cgminer ./cgminer --scrypt -o stratum+tcp://ftcpps.nut2pools.com:5565 -u nutnut.2 -p x --gpu-vddc 1.175 --shaders 2048 --thread-concurrency 8192 --intensity 13 -g 2 --worksize 256 --lookup-gap 2 --gpu-engine 1080 --gpu-memclock 1500
                    [/code]

                    It’s also worth noting that if i run with the screen connected, it drops the hash significantly…

                    [attachment deleted by admin]

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                    • M
                      Myerss last edited by

                      This is what i get with those settings :'(

                      [attachment deleted by admin]

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                      • M
                        Myerss last edited by

                        Do you guys use amds 13.4 or 13.1 drivers? Gonna try downgrading cgminer from 3.5.0 it would be a shame to waste such potential extra hashing power :)

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                        • R
                          RIPPEDDRAGON Regular Member last edited by

                          [quote name=“Myerss” post=“30879” timestamp=“1381444478”]
                          This is what i get with those settings :'(
                          [/quote]

                          That’s about what I got when running those settings a while back. My MSI 7970s just don’t like standard mining settings, they are at something like 21150 TC and running happily at just over 740KH/s and I can’t get them higher.

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                          • N
                            Nutnut Regular Member last edited by

                            [quote name=“Myerss” post=“30944” timestamp=“1381500902”]
                            Do you guys use amds 13.4 or 13.1 drivers? Gonna try downgrading cgminer from 3.5.0 it would be a shame to waste such potential extra hashing power :)
                            [/quote]

                            Well, if i told everyone i was running i was running 12.11 (coz the 13.x seem to be crap) then i wouldn’t have the advantage would I? Oh wait… Dammit! ;)

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                            • S
                              svennand Regular Member last edited by

                              [quote name=“Nutnut” post=“31007” timestamp=“1381565673”]
                              [quote author=Myerss link=topic=3968.msg30944#msg30944 date=1381500902]
                              Do you guys use amds 13.4 or 13.1 drivers? Gonna try downgrading cgminer from 3.5.0 it would be a shame to waste such potential extra hashing power :)
                              [/quote]

                              Well, if i told everyone i was running i was running 12.11 (coz the 13.x seem to be crap) then i wouldn’t have the advantage would I? Oh wait… Dammit! ;)
                              [/quote]

                              +1, 13.11 and especially 13.4 is crap drivers. random crash and will not work FTW! I use 13.8 beta drivers now on my windows rig. works like a charm.
                              Never crashed, and i can start stop cgminer like i choose without needing the reboot at times due to bad cgminer shutdown…

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                              • M
                                Myerss last edited by

                                Dear (whatever lord you believe in) I shall henceforth never install a 13.4 driver upon a rig again
                                this I swear to thy.

                                Newest beta worked like a charm! :)
                                And after the cryptobadger article I managed to get em down to
                                1.110 volt stable as long as you run them below engine 1090 8)

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                                • ghostlander
                                  ghostlander Regular Member last edited by

                                  [quote name=“Myerss” post=“30944” timestamp=“1381500902”]
                                  Do you guys use amds 13.4 or 13.1 drivers? Gonna try downgrading cgminer from 3.5.0 it would be a shame to waste such potential extra hashing power :)
                                  [/quote]

                                  13.1 is a must have for HD5870 and HD5970 cards. Excellent performance and stability. Tried 13.4 and 13.8 beta 2, uninstalled the same day. I’m talking about Linux of course.

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