4770k and 2400 mhz RAM in iMac?

Discussion in 'iMac' started by Rogier1991, Jan 23, 2014.

  1. Rogier1991 macrumors member

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    Sep 15, 2013
    #1
    I looked through the list of Geekbench 3 results of the 27 inch 2013 iMac. Alle the iMacs with highest single core and multi core scores have 4770k processors and some of them have 32 GB 2400MhZ RAM. How can this be true? I thought the CPU on the iMac was not replaceable and the iMac could only handle 16 GB 1866Mhz RAM max? What have these guys done?
     
  2. Chippy99 macrumors 6502a

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    Apr 28, 2012
    #3
    I don't know but the CPU is replaceable and I am not sure 1866 ram is the limit. 1600 is the highest supported by Intel or Apple, but obviously 1886 works and perhaps higher than that works too. That said, I am not aware of any 2400 rated sodimms and burning your own SPD on the sodimm would be tricky or impossible.

    So more likely these are Hackintosh's and not real Macs, I would suspect
     
  3. Rogier1991 thread starter macrumors member

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    #4
    Any indications of 2133 mhz 8 GB supported in 27 inch iMac?
     
  4. xraydoc macrumors 604

    xraydoc

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    #5
    Don't bother. You're not going to successfully overclock the RAM in an iMac beyond what the system is designed for. And even if you could, it'll buy you 3-4% boosts in performance - maybe - in real-world usage.

    Your iMac is what it is.
     
  5. yjchua95 macrumors 604

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    #6
    Yes, these devices are Hackintoshes.

    My iMac 21.5" was shown to be iMac14,3 in Geekbench. When I looked at the iMac 14,3 chart, turns out that some had i7-4770Ks in it. So I've got a strong feeling that these are Hackintoshes and are polluting the charts.
     
  6. AppleScruff1 macrumors G3

    AppleScruff1

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    Feb 10, 2011
    #7
    The 4770K is an unlocked processor, making it over clockable. I'd be amazed if Apple or any mainstream manufacturer was using one of the K chips.
     
  7. touchUpInside macrumors member

    touchUpInside

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    #8
    Be amazed.
     
  8. nrubenstein macrumors 6502

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    Washington, DC
    #9
    I agree that the performance benefits will be limited to none. That said, the iMac automatically picks out the RAM supported speed and tries to run at it. You have no control over this, and I'm not clear on what/if any limits their are aside from system stability, but it'll do it.
     
  9. yjchua95 macrumors 604

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    #10
    That was my reaction when I saw that the i7 in my retina iMac was a Devil's Canyon i7-4790K.
     
  10. Crunch macrumors 6502a

    Crunch

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    L.A. (although currently overseas)
    #11
    I'm at the point of making this very decision. The fact that it's unlocked is pretty worthless I would say, considering the thermal constraints. Does your 4GHz i7 make your iMac really noticeably snappier and otherwise faster? And I don't mean Final Cut Pro-type work. Thanks a bunch!
     
  11. yjchua95 macrumors 604

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    #12
    In regular tasks? Nope.

    I do a lot of hyper threaded tasks all the time, hence the need of an i7.
     
  12. JPoetal macrumors newbie

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    Feb 11, 2013
    #13
    I can't ever imagine Apple shipping with and -k processors. Unless there was a supply issue at Intel..even then I don't buy it.
     
  13. yjchua95 macrumors 604

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    #14
    Well believe it.

    I ran a command in Terminal to bring up the CPU identifier and it was an i7-4790K Devil's Canyon in my retina iMac.
     
  14. ixxx69 macrumors 6502a

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    #15
    I don't understand what all the fuss is about? The "K" just means it's unlocked. Even if you can't OC the i7-4790K (which Apple doesn't allow of course), it's still the fastest desktop CPU available @ 4.4GHz. The normally aspirated i7-4790 tops out @ 4.0GHz.
     

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