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    280x Toxic Under-volt

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    • I
      Ignition75 Regular Member last edited by

      [quote name=“uncle_muddy” post=“58229” timestamp=“1392055904”]
      [quote author=mattmct link=topic=7501.msg58142#msg58142 date=1391983463]
      Cheers Muddy, this is a great post.

      I’ve not had time in weeks to properly play with my rig, so it’s nice to see you have put some great time into it, and I’m glad my thread helped you at some point (in links)

      Would you mind sharing your cgminer / sgminer settings? Threads etc also.

      I still need to update to the latest BAMT with sgminer and give the multi core passing function a real try. 2 cores for 280x and 1 core for my 2x 7950s.
      [/quote]

      No worries mate, I’ll dig my cgminer.conf of later tonight and post it for you

      [quote author=Morderchai link=topic=7501.msg58226#msg58226 date=1392053938]
      Man I’m struggling with my Toxic… every .bat file I try it still gives me hardware errors… any guesses where they comming from? I tried almost everything… wich catalyst driver an AMD APP SDK driver? and wich SGminer are you using?

      BTW
      the cards run up to 800 Hash with this .bat:
      -p x -I 13 -w 256 -g 2 --shaders 2048 --thread-concurrency 8192 --gpu-engine 1160 --gpu-memclock 1875
      If you can undervolt it and make it run steady you got a solid 800hash per card.

      great info on undervolting though!
      [/quote]
      I started to get hardware errors if you aim too high! Try adding this and see what you get “–gpu-powertune 20” also I’m running under BAMT which may make a difference, I would that when I use windows with the same settings on higher hash rates, I start to get issues. Going to need a bit more information about your setup to help you sort it out, Mem CPU, PSU ect…

      I’ve caused myself another problem by undervolting now… I used to use the rig to heat the office whilst I was sat in it all day working, now it’s undervolted I have to turn the heating back on ::)

      UM
      [/quote]

      I’ve recently noticed no performance difference between gpu powertune 10 and 20, just extra heat. So I changed all my rigs to gpu powertune 10 and got better temps for the same hashrate…

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      • U
        uncle_muddy administrators last edited by

        Right so hopefully this week I should get a couple of delivery’s to start the build of another rig 8) this one is going to be very different thou, I’m not going to say to much here as this is not what this thread is about, but…

        In doing so I will have another complete setup minus GPUs for now, that I can

        a) test the card that started to give me problems
        b) once a) is sorted, see how low I can really push my luck with undervolting :)

        So I will keep you updated on that.

        If your wondering about temps, and fan speeds after the undervolting after the H/W issues I still have a card running 1.2v in my rig, I’ll sort it later in the week when I get time to but it (GPU0) used to be roughly the same as GPU2 the numbers now are

        GPU0 Temp 71[sup]o[/sup] Fan 54%
        GPU2 Temp 71[sup]o[/sup] Fan 45%

        I haven’t forgotten that someone was after a cgminer.conf dump, I just don’t have that level of access to this rig at the moment, it’s on my todo list

        UM

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        • P
          Pancrisp last edited by

          Woow! 800khash/sec on a 280X?!
          Will have to check that out, bud!

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          • P
            Pancrisp last edited by

            Wow, I really need to undervolt my cards.
            It’s been hitting 35C to 40C in the afternoon.
            My cards are recording temperatures of 84C even with GPU Fan set to 100% and a standing fan hitting them at full blast.

            1 Reply Last reply Reply Quote 0
            • I
              Ignition75 Regular Member last edited by

              [quote name=“Pancrisp” post=“58596” timestamp=“1392159208”]
              Wow, I really need to undervolt my cards.
              It’s been hitting 35C to 40C in the afternoon.
              My cards are recording temperatures of 84C even with GPU Fan set to 100% and a standing fan hitting them at full blast.
              [/quote]

              Sounds like the painful week I just had in Melbourne… I fried a PSU as well :-[ Just gave up in the heat…

              1 Reply Last reply Reply Quote 0
              • P
                Pancrisp last edited by

                Undervolted my cards to 1.081 but hashrates at 730khash/sec :'(
                Good temperatures though. 73C, looks promising.

                EDIT: Made a few changes. Now mining at steady 755khash/sec at 1075MHz core clock and 1500MHz memory clock. Same 1.081v

                1 Reply Last reply Reply Quote 0
                • I
                  Ignition75 Regular Member last edited by

                  [quote name=“Pancrisp” post=“58660” timestamp=“1392204138”]
                  Undervolted my cards to 1.081 but hashrates at 730khash/sec :'(
                  Good temperatures though. 73C, looks promising.

                  EDIT: Made a few changes. Now mining at steady 755khash/sec at 1075MHz core clock and 1500MHz memory clock. Same 1.081v
                  [/quote]

                  Well done Son… What card you getting 755 from?

                  1 Reply Last reply Reply Quote 0
                  • S
                    svennand Regular Member last edited by

                    Anyone know of a windows program to regulate the voltage?
                    Starting to think my sapphire 280x toxic are voltage locked:(

                    My asus matrix cards had no issue with the asus gpu tweak utility (windows).
                    But was limited how low i could set em.

                    1 Reply Last reply Reply Quote 0
                    • I
                      Ignition75 Regular Member last edited by

                      [quote name=“svennand” post=“58844” timestamp=“1392281548”]
                      Anyone know of a windows program to regulate the voltage?
                      Starting to think my sapphire 280x toxic are voltage locked:(

                      My asus matrix cards had no issue with the asus gpu tweak utility (windows).
                      But was limited how low i could set em.
                      [/quote]

                      VBE7 will adjust your voltages for you mate. Flash with atiwinflash…

                      1 Reply Last reply Reply Quote 0
                      • P
                        Pancrisp last edited by

                        [quote name=“Ignition75” post=“58834” timestamp=“1392277451”]
                        [quote author=Pancrisp link=topic=7501.msg58660#msg58660 date=1392204138]
                        Undervolted my cards to 1.081 but hashrates at 730khash/sec :'(
                        Good temperatures though. 73C, looks promising.

                        EDIT: Made a few changes. Now mining at steady 755khash/sec at 1075MHz core clock and 1500MHz memory clock. Same 1.081v
                        [/quote]

                        Well done Son… What card you getting 755 from?
                        [/quote]

                        Mining on MSI R9 280X GAMING cards.
                        Hovers around 730khash/sec when I’m actively browsing the net while mining.

                        1 Reply Last reply Reply Quote 0
                        • S
                          svennand Regular Member last edited by

                          [quote name=“Ignition75” post=“58847” timestamp=“1392282610”]
                          [quote author=svennand link=topic=7501.msg58844#msg58844 date=1392281548]
                          Anyone know of a windows program to regulate the voltage?
                          Starting to think my sapphire 280x toxic are voltage locked:(

                          My asus matrix cards had no issue with the asus gpu tweak utility (windows).
                          But was limited how low i could set em.
                          [/quote]

                          VBE7 will adjust your voltages for you mate. Flash with atiwinflash…
                          [/quote]

                          Damnit, have to flash em then i guess :)
                          Was hoping i didnt need to

                          1 Reply Last reply Reply Quote 0
                          • I
                            Ignition75 Regular Member last edited by

                            [quote name=“svennand” post=“58852” timestamp=“1392289419”]
                            [quote author=Ignition75 link=topic=7501.msg58847#msg58847 date=1392282610]
                            [quote author=svennand link=topic=7501.msg58844#msg58844 date=1392281548]
                            Anyone know of a windows program to regulate the voltage?
                            Starting to think my sapphire 280x toxic are voltage locked:(

                            My asus matrix cards had no issue with the asus gpu tweak utility (windows).
                            But was limited how low i could set em.
                            [/quote]

                            VBE7 will adjust your voltages for you mate. Flash with atiwinflash…
                            [/quote]

                            Damnit, have to flash em then i guess :)
                            Was hoping i didnt need to
                            [/quote]

                            Hehe yeah, it’s better that way, it feels more proper doesn’t it?

                            1 Reply Last reply Reply Quote 0
                            • S
                              svennand Regular Member last edited by

                              [quote name=“Ignition75” post=“58853” timestamp=“1392289594”]
                              [quote author=svennand link=topic=7501.msg58852#msg58852 date=1392289419]
                              [quote author=Ignition75 link=topic=7501.msg58847#msg58847 date=1392282610]
                              [quote author=svennand link=topic=7501.msg58844#msg58844 date=1392281548]
                              Anyone know of a windows program to regulate the voltage?
                              Starting to think my sapphire 280x toxic are voltage locked:(

                              My asus matrix cards had no issue with the asus gpu tweak utility (windows).
                              But was limited how low i could set em.
                              [/quote]

                              VBE7 will adjust your voltages for you mate. Flash with atiwinflash…
                              [/quote]

                              Damnit, have to flash em then i guess :)
                              Was hoping i didnt need to
                              [/quote]

                              Hehe yeah, it’s better that way, it feels more proper doesn’t it?
                              [/quote]

                              havent flashed an GPU since before the millenium, not to sure ???

                              1 Reply Last reply Reply Quote 0
                              • I
                                Ignition75 Regular Member last edited by

                                [quote name=“svennand” post=“58854” timestamp=“1392289663”]
                                [quote author=Ignition75 link=topic=7501.msg58853#msg58853 date=1392289594]
                                [quote author=svennand link=topic=7501.msg58852#msg58852 date=1392289419]
                                [quote author=Ignition75 link=topic=7501.msg58847#msg58847 date=1392282610]
                                [quote author=svennand link=topic=7501.msg58844#msg58844 date=1392281548]
                                Anyone know of a windows program to regulate the voltage?
                                Starting to think my sapphire 280x toxic are voltage locked:(

                                My asus matrix cards had no issue with the asus gpu tweak utility (windows).
                                But was limited how low i could set em.
                                [/quote]

                                VBE7 will adjust your voltages for you mate. Flash with atiwinflash…
                                [/quote]

                                Damnit, have to flash em then i guess :)
                                Was hoping i didnt need to
                                [/quote]

                                Hehe yeah, it’s better that way, it feels more proper doesn’t it?
                                [/quote]

                                havent flashed an GPU since before the millenium, not to sure ???
                                [/quote]

                                I was crapping myself the first time I did it, now I"ve flashed so many times my mind is an ASIC chip for atiwinflash…

                                1 Reply Last reply Reply Quote 0
                                • S
                                  svennand Regular Member last edited by

                                  haha ;D

                                  1 Reply Last reply Reply Quote 0
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