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    • D
      DeadZebra Regular Member last edited by

      List updated. I’m sure after a while we will have a great list for people to have a look at.

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      • S
        sheepson Regular Member last edited by

        Yeah :)

        In case anyone wants to know, my parameters are:
        –worksize 256 --lookup-gap 2 --thread-concurrency 5824 -g 1 --intensity 19

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        • D
          digiworx last edited by

          Hi!

          I am running a rig with two 6990s getting an average hash of 1750 kh/s in total at 85 - 90°C per card and besides this system, I also have a 5970 in my work computer, which is hashing at an average rate of 675 kh/s at 75°C.

          Both systems use standard air cooling.

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          • P
            pyxis last edited by

            Card 1 7950 615Khash 54°C
            Card 2 7950 615Khash 69°C
            Card 3 7950 615Khash 69°C
            Card 4 7950 615Khash 69°C
            (No overclocking, All 4 cards cooled with a single 150mm 20Watt Fan, Speed Average over 1 week)

            (In Overclocking tests I can get cards up over 700Khash each, but I have done no long duration runs)

            Card 1 7950 665Khash 61°C
            Card 2 7950 666Khash 72°C
            Card 3 7950 664Khash 71°C
            Card 4 7950 664Khash 73°C
            (All 4 cards cooled with a single 150mm 20Watt Fan, Speed Average over 1 day, temp is max reported over a day, temp average is lower, about 66°C for the 3 hotter cards, less again for the coolest card)
            (Overclocking, afterburner settings are power limit at 20%, core clock at 1100Mhz and memory clock at 1350Mhz)

            My final long test will push the cards to near max, using power limit at 20%, core clock at 1200Mhz and memory clock at 1400Mhz, my only problem is to keep the heat down, I will probably use some form of ducting like christian has suggested.

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            • C
              ChristianRiesen Regular Member last edited by

              [quote name=“pyxis” post=“4295” timestamp=“1368872584”]
              Card 1 7950 615Khash 54°C
              Card 2 7950 615Khash 69°C
              Card 3 7950 615Khash 69°C
              Card 4 7950 615Khash 69°C
              (No overclocking, All 4 cards cooled with a single 150mm 20Watt Fan, Speed Average over 1 week)

              (In Overclocking tests I can get cards up over 700Khash each, but I have done no long duration runs)
              [/quote]
              Can you post your parameters for those 700 Khash speeds? Like the command used to start cgminer with the correct settings to reach that. I haven’t gone all the way out, I reach about 650 steady at 73C .

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              • S
                sheepson Regular Member last edited by

                My machine just crashed! :(.

                I can’t reboot it till tuesday.

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                • P
                  pyxis last edited by

                  [quote name=“ChristianRiesen” post=“4303” timestamp=“1368877904”]
                  [quote author=pyxis link=topic=264.msg4295#msg4295 date=1368872584]
                  Card 1 7950 615Khash 54°C
                  Card 2 7950 615Khash 69°C
                  Card 3 7950 615Khash 69°C
                  Card 4 7950 615Khash 69°C
                  (No overclocking, All 4 cards cooled with a single 150mm 20Watt Fan, Speed Average over 1 week)

                  (In Overclocking tests I can get cards up over 700Khash each, but I have done no long duration runs)
                  [/quote]
                  Can you post your parameters for those 700 Khash speeds? Like the command used to start cgminer with the correct settings to reach that. I haven’t gone all the way out, I reach about 650 steady at 73C .
                  [/quote]

                  I use GUIMiner and MSI afterburner, afterburner settings are power limit at 20%, core clock at around 1200Mhz and memory clock at 1400Mhz max, I have had a constant 710Khash but I ran it only for 1 hour as I had no cooling. I have not yet carried out longer tests so I don’t know if 700plus speeds can be maintained very long.

                  Hope this helps, hope I don’t blow up my rig :) All in the name of science, fun and coins. ;D

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                  • K
                    Kagemusha last edited by

                    4870 @ 100kh/s (retired until I can x-fire it with another 4870)
                    6950 (unlocked to 6970) @ 240kh/s (needs work to optimise) currently getting CGminer crashes at 13 intensity…

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                    • C
                      ChristianRiesen Regular Member last edited by

                      [quote name=“Kagemusha” post=“4352” timestamp=“1368908808”]
                      4870 @ 100kh/s (retired until I can x-fire it with another 4870)
                      6950 (unlocked to 6970) @ 240kh/s (needs work to optimise) currently getting CGminer crashes at 13 intensity…
                      [/quote]
                      Just as a hint, crossfire does nothing to improve hashrates, in fact it can even lower them.

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                      • K
                        Kagemusha last edited by

                        [quote name=“ChristianRiesen” post=“4353” timestamp=“1368909118”]
                        [quote author=Kagemusha link=topic=264.msg4352#msg4352 date=1368908808]
                        4870 @ 100kh/s (retired until I can x-fire it with another 4870)
                        6950 (unlocked to 6970) @ 240kh/s (needs work to optimise) currently getting CGminer crashes at 13 intensity…
                        [/quote]
                        Just as a hint, crossfire does nothing to improve hashrates, in fact it can even lower them.
                        [/quote]

                        Gah! More reading it is then…ta.

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                        • P
                          pyxis last edited by

                          Added another 200Khash in overclocking ;D and with only a few degrees heat increase. See post above for new stats.

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                          • C
                            ChristianRiesen Regular Member last edited by

                            [quote name=“pyxis” post=“4422” timestamp=“1368982167”]
                            Added another 200Khash in overclocking ;D and with only a few degrees heat increase. See post above for new stats.
                            [/quote]
                            Thats some cool numbers.

                            As a hint when doing ducting with fans: You can make it worse with ducts. I suggest using cardboard or similar material that you can fast move and alter for first trials while keeping your temperatures in constant view. If you do it wrong, you might actually deflect your fans power from where it needs to be.

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                            • P
                              pyxis last edited by

                              Thank You Christian.

                              Excellent, I have corrugated plastic board which is similar to cardboard but stronger.
                              I can use that for testing.
                              Once I get the size and shape correct, I can make a metal duct.

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                              • C
                                ChristianRiesen Regular Member last edited by

                                [quote name=“pyxis” post=“4444” timestamp=“1368995869”]
                                Thank You Christian.

                                Excellent, I have corrugated plastic board which is similar to cardboard but stronger.
                                I can use that for testing.
                                Once I get the size and shape correct, I can make a metal duct.
                                [/quote]
                                Be careful with the plastic, it might melt… Cardboard can catch fire, but usually takes a bit more than the plastic melting point :)

                                A good begin is to get directly form the fan to where the cards start. Close holes on the sides, etc, then the air should get much more direct on target.

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                                • N
                                  Nutnut Regular Member last edited by

                                  Still cant help but think you’re over thinking the cooling/ducting. I have 3x 12" desk fans that cool all 5 of my rigs. Current temps on Miner-01 65,63,66,70. KISS (Keep It Simple Sir).

                                  Oh and if you manage to set fire to cardboard on your GPU’s - you’re doing something very wrong. :P

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                                  • D
                                    DeadZebra Regular Member last edited by

                                    Rig stats updated :P Please let me know if you think I’ve missed something.

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                                    • N
                                      Nutnut Regular Member last edited by

                                      Top Man!

                                      The Sapphire stats aren’t mine though. :-\

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                                      • D
                                        DeadZebra Regular Member last edited by

                                        [quote name=“Nutnut” post=“4837” timestamp=“1369120058”]
                                        Top Man!

                                        The Sapphire stats aren’t mine though. :-\
                                        [/quote]

                                        Woops haha let me fix that

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                                        • D
                                          DeadZebra Regular Member last edited by

                                          Two cards were replaced.

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                                          • D
                                            Drjones Regular Member last edited by

                                            I have 3 x 7950’s temps are abit weird.

                                            Temps are - 59, 69 and 89

                                            Seems which ever one i use in slot one cant keep it under 89? I have to run this @ only 460 k/hash while other are on 600 k/hash with no problems.

                                            Pics included below:

                                            [img]http://s22.postimg.org/6e43whmox/IMG_0493.jpg[/img]
                                            [img]http://s17.postimg.org/ufzmpt333/IMG_0494.jpg[/img]

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