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    GA-990FXA-UD3 gpu 1 always slow

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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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