netkas.org

OSX vs WIN on AMD/ATI

Same post as previous, but for amd videocard, 7950, osx 10.9 vs win8+catalyst 13.8b2

OSX 10.9

Win8 OGL

Win9 DX11

OSX AMD drivers are 34% slower than windows ogl drivers and 51% slower than windows DX11 drivers

such result could be due to extreme tessellation mode and inability of osx drivers to handle it fast enough. Also 8xAA made a big hit.

Comments

  1. jeanlain
    August 21st, 2013 | 7:20 pm

    Bansaku on the other thread reported much better results on the 7950, at higher res but with only 4x AA. Still, much closer to Windows.
    Maybe OS X doesn’t handle the presence of 2 GFX cards very well?

  2. Bansaku
    August 21st, 2013 | 7:58 pm

    Here is my results from the exact settings used in the screens above (OpenGL, Extreme preset): HIS 7950HD Boost 3GB, Z77X-UD5H, i7 3770K, 16GB 1866MHz

    OS X 10.9 DP5: 25.6fps/649

    Windows 8.1 13.8b2: 33.5fps/845

    Difference is 23%

    Keep in mind my system is significantly faster than any real Mac, and I am sure PCIe 3.0 really helps narrow the gap.

  3. Bansaku
    August 22nd, 2013 | 4:21 am

    Updated test. It seems I accidentally had OC settings in Windows. Lucky for me, 10.9 DP6 just came out so a retest was needed anyway. Here are the new results, ran 3 times each OS with a reboot in-between each.
    Heaven Extreme presets; Z77X-UD5H, i7 3770K, 16GB 1866MHz

    OS X 10.9 DP6: 29.3fps/737

    Windows 8.1 13.8b: 26fps/626

    Like I said, I ran each test 3 times. I am impressed! Screens over at Insanelymac!

  4. August 24th, 2013 | 10:02 pm

    Haha, Win9 (Win 8.1)

  5. jeanlain
    September 1st, 2013 | 12:33 pm

    netkas, OS X imposes Vsync on every windowed app, even games in which Vsync is supposed to be off. So you should redo the test in fullscreen or with Beam sync disabled in Quartz Debug (unless you did it in your tests).
    That would explain the discrepancies with other people’s results.

  6. xtraa
    October 30th, 2014 | 12:06 pm

    Couldn’t it be because OS X makes only use of the GPU while windows also takes the CPU for gfx acceleration?

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