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rFactor with AMD CrossfireX - Low FPS?

Discussion in 'rFactor' started by Alex Ball, Dec 12, 2011.

  1. Alex Ball

    Alex Ball
    Web Nerd

    Anyone else tried using rFactor with CrossfireX? - I am running three monitors, but when I enable Crossfire the FPS drops to 40ish average. Without it enabled I get 60 (capped with vsync).

    Any ideas what would be causing it?

  2. Hi Alex,
    Only game I run is rfactor and mod is Orsm. I did the following tests about 2 months ago for another request similar to yours.
    To give you an idea: In preparations for fps I did the following:
    Start comp and Fraps and let it settle for a solid 3 min.
    Programs running: Windows7 Aero, touchbuddy, simview, Actuators(Xsim)
    (behind programms not known if any) No antivirs running. No Internet in backround.
    Second Pc runs Teamspeak, Touchbuddy and simview only.
    Full graphics all switched on (Maxed out as they say)
    As you know: 3x46" Tv's at 6048x1080 res ,
    9 USB devices connected/plus internet Average temp of graphic chip 66deg in game, Average temp of graphic chip 50deg windows only, Ambient temp ave, 22deg, Not known comp chip temp.

    Adelaide2011 cir,
    28 cars on grid, Posi,start as 28th on grid stand still.....72fps
    28 cars on grid, Posi,start as 6th on grid stand still......88fps
    Solo run at start....130fps up to....210fps at various sectors of the track.
    Melbourne V2.5 cir,
    28 cars on grid, Posi, start as 28th on grid....94fps
    28 cars on grid, Posi, start as 6th on grid.....115fps
    Solo run at start....190fps up to 217fps at various sectors of the track.
    28 cars on grid, Posi,start 28th on grid....108fps
    28 cars on grid, Posi,start 6th on grid.....132fps
    Solo run at start.....182fps up to 259fps at various sectors of the track.

    I am not overclocked. But do have Crossfire enabled. Drivers 10.6. No Vsync.
    I have done no tests with Crossfire disabled. I have no solution for you as this converstaion could go on forever, simply because every comp has its own personality as is.. it's personalised to ones liking. Therefore like me through trial and error I found the best performance I could. In doing this I found,
    The preferred Video Drivers, Backround noise/programmes off, Vsync Off,made a major difference.
  3. Alex Ball

    Alex Ball
    Web Nerd

    What's your PC spec?

    Mine is:

    i5 2500k @ 4.4ghz
    16gb ram
    2x 6970 2gb in CrossfireX
    Standard sata hard drive (non-ssd)

    Nothing running except Fraps and the software for my SimRDisplayX thingy.
  4. SimXperience Stage lV Series Simulator with Rear Traction Loss(complete)
    i7 960 (3.20Ghz) not overclocked
    MOBO: Intel X58 Chipset - (Gigabite GA-X58A-UD7)
    CASE: Gaming Tower, ThermalTake Armor+ Aluminium POWER: 1200W
    MEMORY: 12Gb (Corsair Dominator) HARD DISK-Western Digital ( VelociRaptor )
    VGA: ( CrossFireX ) Dual 1GB, ATI Radeon HD 5870 (for future proof+other games)
    Cannon Sim Tech (CST) Pedals, G25 FFB Steering wheel
    SimWorks V8 Gear seq shifter
    Sharp Aqous 3x46" HD Tv's in Eyefinity (6048x1080p)
    O/S: Windows 7 64-Bit

    When ordered specifically asked for NO Bottle necks
  5. Alex Ball

    Alex Ball
    Web Nerd

    mad. My spec is very similar in reality, yet I go down to 20fps when in the pitlane or at the back of the grid.