Do the new iMacs have the integrated graphics?

Discussion in 'iMac' started by diablo9333, Dec 8, 2012.

  1. diablo9333 macrumors newbie

    Dec 8, 2012
    I don't know if anyone else noticed, but I recall with the previous iMac lineup you could see on the Apple website that it included the integrated graphics that come built in with the CPU but with this lineup I don't see that. Does anyone on here have the new iMac and can they verify whether Apple somehow removed the integrated graphics? I know it might sound like a silly suggestion but I was just wondering as they have it unlisted and with an iMac that thin, you begin to wonder what else is missing besides upgradable RAM and HDDs.
  2. Lukkee24 macrumors 6502a

    Sep 20, 2011
    Yeah I noticed it wasn't listed, but as this will be my first iMac (in fact, any mac), I wasn't sure if the previous ones had it or not.
  3. joe-h2o macrumors 6502a

    Jun 24, 2012
    It's not "missing" since it was never used - the iMac has a discrete GPU that is never disabled, so an integrated GPU is simply not needed.

    The CPUs that Apple uses from Intel are the ones that either do not have the integrated GPU in the first place, or have the "HD2500" one tacked on - ie, they don't bother paying extra for the HD3000/HD4000 "higher spec" integrated GPUs on the Sandy/Ivy chips, they just get the cheaper ones.

    Having the HD4000 integrated GPU would be a pointless and unnecessary extra cost for the iMac since it would never be used.

    Edit: The RAM and HDD are upgradable in both 2012 iMacs (21" and 27"), although you have to take the screen off to do the RAM in the 21". In exactly the same way as in the earlier iMacs, you obviously have to remove the screen to replace the HDD.
  4. Adam552 macrumors 6502

    May 30, 2006
    Liverpool, UK.
    You will not be able to update the graphics in the iMac.
    The graphics in the iMac are not integrated, they are powerful discrete mobile GPUs. They don't use integrated graphics on the CPU.
  5. Incindium, Dec 8, 2012
    Last edited: Dec 8, 2012

    Incindium macrumors member

    Apr 3, 2009
    Actually it would be good to know because there are things the integrated GPU can be used for with the Ivy Bridge chips even when using a dedicated GPU.

    Looks like they do have on board graphics. The I-fixit teardown on the 21.5" showed a i5 3330s proc which has HD2500
  6. glitch44 macrumors 65816

    Feb 28, 2006
  7. MatthewAMEL macrumors 6502


    Oct 23, 2007
    Orlando, FL
    That doesn't answer the OPs question.

    Every Ivy Bridge Mobile processor and all but one Desktop model come with the IGP. (the i5-3550P is the exception)

    Apple isn't worried about battery/performance levels in the iMac, so there is no GPU switcher provided, but the IGP is present, just not used.
  8. leman macrumors G3

    Oct 14, 2008
    The iMac CPUs do have an integrated GPU, but its most likely not even hooked to the display output. So in essence, its deactivated.
  9. kaellar macrumors 6502

    Nov 12, 2012
    Sad but true, especially considering the fact that Intel's QuickSync used in its IGP can vastly improve encoding performance in some apps.
  10. joe-h2o macrumors 6502a

    Jun 24, 2012
    Why is that sad but true?

    The GPU does not need to be hooked to a display output to be used as a co-processor.

    GPGPU stuff is often done on setups with multiple GPUs that are installed but not connected to an output.

    The IGP on the CPU die will be accessible to the processor, it just won't be able to use it to display things on the screen.
  11. kaellar macrumors 6502

    Nov 12, 2012
    I've been using a PC with i5-2400 CPU since my mbp 2009 died. I don't know if Mac OS currently allows IGP usage while discrete GPU is active, but under win7 it can't be done without some tweaks like Lucid Virtu. It forces both GPUs to be active at the same time, and even that feature doesn't work really well for my usage scenario.
  12. leman macrumors G3

    Oct 14, 2008
    I believe the use of QuickSync is independent of whether the IGP is used for video output or not. Also, if I am not mistaken, QuickSync extends the CPU instruction set to provide some specialised encode/decode commands. I have no idea how it is actually implemented though.
  13. Chupa Chupa macrumors G5

    Chupa Chupa

    Jul 16, 2002
    FWIW my 21" entry does not list integrated where my 15" rMBP does, so if it is on the CPU it's disabled.

    Not sure why you'd want the Intel 4000. The point of having dual GPUs on the laptops is to save battery when integrated is overkill. But on a desktop the power savings is minimal so doesn't make much sense.
  14. glitch44 macrumors 65816

    Feb 28, 2006
    What does it matter if it's not present or if it's present but inaccessible? The end result is you can't use it.
  15. kaellar macrumors 6502

    Nov 12, 2012
    I can't say for sure is it independent in Mac OS X, but in Windows it actually depends on what GPU are you using, trust me.
    And you're wrong about CPU instruction set. QuickSync is a logical block which is the part of HD Graphics GPU and is responsive for video decoding/encoding, pretty much like AMD UVD (can't remember the name of nVidia's analog), but much more efficient.
  16. leman macrumors G3

    Oct 14, 2008
    Ah, ok. I was slightly confused by this quote (this is from the interview with an Intel manager, see here:

  17. diablo9333 thread starter macrumors newbie

    Dec 8, 2012
    Thanks for all the responses. Just to clarify...I own a Macbook 2008 White model at the moment. I am entirely aware of the non-upgradable graphics as all of the graphics are integrated. I appreciate all of the responses and yes I don't see a big issue with the models not having it, with dedicated graphics already installed it isn't that big of a problem. Just ordered my 21" iMac with completely maxed out specs(that's right. Fusion Drive, Core i7 with Turboboost 3.9 Ghz, and 16 GB RAM). I'll probably Geekbench it when it arrives. Looking forward to it.

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