ATI 3870 OpenGL Benchies - 10.5.7 v. 10.6 - um, wtf?

Discussion in 'macOS' started by JPamplin, Jul 24, 2009.

  1. JPamplin macrumors 6502

    JPamplin

    Joined:
    Mar 12, 2009
    Location:
    Nashville, TN
    #1
    I didn't expect this one, but perhaps it's a beta thing... :confused:

    Observe the two benchmarks below. I ran the OpenGL Extensions Viewer tests in 10.5.7 versus 10.6 build 411. It stated that the ATI 10.5.7 driver (version 2.0 ATI-1.5.44) supported 105 extensions, while 10.6 (version 2.1 ATI-6.0.81) supported 111. So I thought, OK, everything's faster in 10.6, yes?

    Um, no. Benches on the exact same hardware (my Pro, listed in the sig), show a substantial decrease in FPS on my 3870 in 10.6 versus 10.5. Image on the left: 10.5.7 - image on the right: 10.6

    Anyone hazard a guess on this one? JP
     

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  2. Cinder6 macrumors 6502

    Cinder6

    Joined:
    Jul 9, 2009
  3. JPamplin thread starter macrumors 6502

    JPamplin

    Joined:
    Mar 12, 2009
    Location:
    Nashville, TN
    #3
    Well, maybe - it may be that simple. But there a couple of things that make me wonder.

    First, at WWDC Bertrand said that 64-bit operations are inherently faster on 64-bit chips - I have no idea on this, but is the 3870 CPU 64-bit, or is there no frame of reference here? Wouldn't the driver be 64-bit by default?

    Secondly, since the new driver supports more OpenGL Extensions, then the OS should hand off a little more to the GPU to handle. This may not affect the benchmark.

    It may be a simple matter of bolting in a 32-bit driver into a 64-bit OS.

    JP
     
  4. jalyst macrumors regular

    Joined:
    Aug 17, 2009
  5. ctich macrumors newbie

    Joined:
    Feb 9, 2011
    #5

    Good day, Sorry for my english, but I want to clarify, you have to HD3870 QE \ QI earned in full, if you look at screening, yes?
    The video card was for ordinary PC or Mac?
    Thank you.
     

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