Graphics benchmark - integrated vs dedicated

Discussion in 'MacBook Pro' started by bwhite123, Jul 26, 2014.

  1. bwhite123, Jul 26, 2014
    Last edited: Jul 26, 2014

    bwhite123 macrumors newbie

    Mar 17, 2012

    I have an Early 2011 15" Macbook Pro. Recently the graphics seems to have broken, in that I get horizontal black lines across the screen or the image is shifted a couple of hundred pixels to the left or right, e.g. so what should be on the very left of the screen actually appears on the far right.

    I think it's a problem with the dedicated graphics (6750M 1Gb), but I want to test this theory before I take it into the Apple store (thankfully I'm just within my Applecare warranty). The problem has happened both in OSX 10.9 and Windows 7 running bootcamp so it's likely hardware and not software at fault.

    Is there a graphics benchmark where I can specify whether to use just the integrated (Intel) or dedicated (AMD/ATi) graphics so I can do a comparison and see if the problem only happens when using one of them?

    Also the problem is intermittent (happens every few hours) so if I could get a graphics benchmark that caused the problem pretty quickly (e.g. a couple of mins) that would be useful when trying to demonstrate the problem to the Apple store people.

  2. yjchua95 macrumors 604

    Apr 23, 2011
    GVA, KUL, MEL (current), ZQN
    It's Radeongate.

    All 2011 15"/17" MBPs with the Radeon GPU have the same manufacturing flaw in the logic board that causes Radeongate to happen.

    The only real solution is a reball of the GPU. Replacing the board won't work as Radeongate will happen again.

    I was a victim of Radeongate.
  3. bwhite123 thread starter macrumors newbie

    Mar 17, 2012
    Yes it would appear there is an issue...

    Can anyone recommend a graphics benchmarking tool for OSX, so I have a better chance of causing the error when I get to the Apple store, and thus have a better chance at getting a replacement.

    (Of course, I presume there is a chance the replacement will have the same issue, but hopefully it won't die again before the new 14nm intel CPUs come out and I can upgrade)
  4. GoldfishRT macrumors 6502


    Jul 24, 2014
    Mine's currently getting Apple depot repair for the same reason. :(

    I don't know of a good tool to use in OS X but in Windows Furmark would surely stress the system enough.

    Mine was so borked that I couldn't even boot in any operating system before getting severe distortions or freezing.

    Apple hasn't officially said anything but the lady in the Apple Store assured me it was a "known issue" and that both her 2011 models also had to be repaired.

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