5 Replies Latest reply on Mar 17, 2018 4:59 AM by el_sauvageon

    Problems getting 2nd R9 280x to engage in Crossfire




      So - I have a crossfire set up of two R9 280x.  When I purchased them they were constantly artefacting at stock speeds, after being given a 2nd for free, I proceeded to underclock/volt them to achieve stability:


      My settings are:                 Stock for those that can't remember:

      Voltage: 1150mV               1200mV

      Core: 1040mhz                  1070mhz

      Vram: 1300mhz                 1600mhz


      However, for a while now (months) I have not been able to get the 2nd GPU to engage in crossfire - it is there, but stuck on 0% usage, 300mhz/150mhz clock/ram clock.

      Does anyone have any ideas on what could be causing this? I have tried to include as thorough a set of things I've tested below.


      Tested by disabling OverDrive through restoring factory settings - no success

      Tested on: 18.2.1 - 17.7.2 - 16.12.2 - 15.12 - 15.7.1 - 14.12 - no success

      Tested each card individually - both working

      Tested with no AMD settings installed - no success

      Tested by uninstalling and reinstalling Windows 10 - no success

      Used new Crossfire cable - no success


      As per AMD support advice, I have uninstalled MSI AB with Revo Uninstaller, uninstalled-reinstalled AMD drivers 18.23 (whatever the latest ones are 01/03/18), not installed MSI AB after:

      Same problems, 1st GPU frequently getting stuck at 970/1600 (causing artifacts), 2nd GPU never being used beyond its 'parked' setting of 300/150, and all round hassle on what can only be assumed to be a driver issue.


      Checked data using MSI Afterburner 4.4.2 and MSI Kombustor 3.0 - following complete removal of MSI and Windows reinstall, now only monitoring using AMD OverDrive

      Checked playing on Warhammer: Total War, and MSI Kombustor 3.0


      Please, if anyone is having similar issues don't hesitate to post your problems or solutions on here, the more data the better.

      (Unless, of course, I'm the only R9 280x CF user with these issues, in which case I'm going to just blow my cards up with a shotgun and get a 1080).




      At this point I'm assuming there is no help as I have scoured the internet to no avail, I've worked back methodically - even reinstalling Windows, and nothing has worked (despite both cards running fine).  This must be a driver issue and, from what I'm gathering, no-one seems to have the problem themselves, or if they have they've already upgraded and ditched their old cards.  I think it might be time for me to do the old switcheroo to green, sadly.  Years of hassle with Crossfire will do this to a man.




      Thanks for any help nonetheless,



      DXDiag (short)


      System Information


      Time of this report: 2/19/2018, 17:40:31

      Machine name: JOHN-RAPPOPORT

      Machine Id: {96E2205F-78B9-4F67-AC88-905FDDEAA8D3}

      Operating System: Windows 10 Home 64-bit (10.0, Build 16299) (16299.rs3_release.170928-1534)

      Language: English (Regional Setting: English)

      System Manufacturer: Gigabyte Technology Co., Ltd.

      System Model: Z87X-D3H

      BIOS: BIOS Date: 08/02/13 22:37:08 Ver: 04.06.05

      Processor: Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz (4 CPUs), ~3.4GHz

      Memory: 8192MB RAM

      Available OS Memory: 8148MB RAM

      Page File: 5162MB used, 11384MB available

      Windows Dir: C:\WINDOWS

      DirectX Version: DirectX 12

      DX Setup Parameters: Not found

      User DPI Setting: 96 DPI (100 percent)

      System DPI Setting: 96 DPI (100 percent)

      DWM DPI Scaling: Disabled

      Miracast: Available, with HDCP

      Microsoft Graphics Hybrid: Not Supported

      DxDiag Version: 10.00.16299.0015 64bit Unicode

        • Re: Problems underclocking R9 280x crossfire with latest drivers - which drivers are best?

          No crossfire here, but you can disable/turn off wattman/overdrive by using the 'restore factory defaults' (do not reenable it). Some suggest you should then clean install the driver.

          One thing to keep note of, is that amd changed/modified the wattman(overdrive ?) api in july '17 drivers. You need the newer msi-ab (may need to check for leftovers of older vers.). You may need to confirm if using older driver, will also need to use older msi-ab.

          You could also post a query on 'guru3d.com' msi-ab forum section for suggestion on settings.

          • Re: Problems getting 2nd R9 280x to engage in Crossfire


            for me every driver after 17.1 will fail with crossfire on my r9 280. I don't have test with last driver... wanna do it today but this thread stop me from test it. I know that every time i change for last drivers i have many problems to make it run again... Maybe you should use driver sweeper or amdcleanerutility (search on amd  for last one... last time amd cleaner was the best solution for reinstall 16.12).

            Have you test the other pci express (i see 3 pcie on that card) you can maybe losing little bandwith but if crossfire is enable you win some more...H&ave you the cd that is bundle with the card there can be some driver part for chipset that you can't find anymore...