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    GA-990FXA-UD3 gpu 1 always slow

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    • A
      angloblaxon Regular Member last edited by

      its just weird. i cant explain it.

      gpu 0 @ 710 - 720 kh/s
      gpu 1 @ 670 - 680 kh/s
      gpu 2 @ 710 - 720 kh/s
      gpu 3 @ 710 - 720 kh/s

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      • T
        TheTribesman last edited by

        [quote name=“angloblaxon” post=“43595” timestamp=“1386883933”]
        its just weird. i cant explain it.

        gpu 0 @ 710 - 720 kh/s
        gpu 1 @ 670 - 680 kh/s
        gpu 2 @ 710 - 720 kh/s
        gpu 3 @ 710 - 720 kh/s
        [/quote]
        A shot in the dark, but try dropping intensity on GPU 0 by 1 notch. I had something like this. I dropped intensity on GPU 0 down 1 notch and it disappeared.

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        • M
          moafred last edited by

          I have exactly the same problem with the same motherboard.
          I run 2 280x toxic.
          Most of the time they both run at 750kh, but after a time the hashrate of one card fall to 350kh (temp 70° max, so not too high).

          I use 8Gb of RAM and a Athlon X2 270. I wonder if the CPU is not a bit too weak.

          Even after a reboot the hashrate does come back to the max value.
          It seems that if I unplug the card for a while and plug it back, the hashrate comeback to the max value.

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          • S
            s2 bergen last edited by

            Damn… Installed 4Th gpu, and have same problem as yours. My hardware :

            Mobo : x79a-gd45 plus
            CPU : Intel Xeon E5-2603 v2
            Ram - 4gb
            Gpu : x4 - Sapphire R9 280x Vapor x
            Psu : Corsair AX 1200i

            Windows 7 Ultimate x64

            Any help would be much appreciated and probably rewarded :

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            • R
              RIPPEDDRAGON Regular Member last edited by

              I was having the same exact problem with my new Gigabyte R9 280xs that I got last night…the first GPU was always like 100 KH/s slower. I could tune them to popular settings and the first card would stay in the 600s and the secondary cards would all ramp to 750KH/s. What seemed to be the problem when I was looking in afterburner was that the memory on the first card was almost completely used up and everyone else was using a bit less. I had to turn down my settings a little bit until the first card could run like the rest of them. I actually ended up using the same settings that are on my MSI 7970s -g 2, tc 21105, gpu clock 1050, memclock 1500 and got 730KH/s on all of the cards…I DONT KNOW WHY THESE SETTING ONLY WORK FOR ME WTF… I can never get other’s settings to work on my cards…they always end up with some weird TC value. If I get more time to test I want to see if its the OS I have been using for my Image that is the reason for only weird setting working.

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              • A
                angloblaxon Regular Member last edited by

                yea it must be some weird OS usage issue. Anyone reporting this that is on linux? im a windows user ( cause im lazy )

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                • S
                  s2 bergen last edited by

                  Watching at 2 rigs with same hardware, one is on win7 (catalyst 13.9) and another is win8 (catalyst 13.11)
                  Conf. files is same
                  Windows 7:
                  752-755 kh/s
                  752-755 kh/s
                  752-755 kh/s
                  649-666 kh/s

                  Windows 8:
                  753-756 Kh/s
                  753-756 Kh/s
                  665-720 Kh/s
                  753-756 Kh/s

                  Looks like windows8 is better a litle bit :) Will install win8 in first rig to, on Sunday. And will post update.

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                  • A
                    angloblaxon Regular Member last edited by

                    yea this one with issue has windows 8 as well :-S

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                    • E
                      Ernesto last edited by

                      [quote name=“s2 bergen” post=“43910” timestamp=“1386967027”]
                      Watching at 2 rigs with same hardware, one is on win7 (catalyst 13.9) and another is win8 (catalyst 13.11)
                      Conf. files is same
                      Windows 7:
                      752-755 kh/s
                      752-755 kh/s
                      752-755 kh/s
                      649-666 kh/s

                      Windows 8:
                      753-756 Kh/s
                      753-756 Kh/s
                      665-720 Kh/s
                      753-756 Kh/s

                      Looks like windows8 is better a litle bit :) Will install win8 in first rig to, on Sunday. And will post update.
                      [/quote]

                      's good to know

                      +rep!

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                      • S
                        s2 bergen last edited by

                        Adding extra rams tomorrow, will see if any better will be

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                        • E
                          Ernesto last edited by

                          [quote name=“s2 bergen” post=“43944” timestamp=“1386970133”]
                          Adding extra rams tomorrow, will see if any better will be
                          [/quote]

                          the system scrypt requires [b]a lot of memory[/b], the system does not need is a sha256 bitcoin.

                          ;D

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