Coffee Lake 8th gen Intel CPU benchmarks are out: 65 Watt i5-8400 beats i7-7700K

Discussion in 'iMac' started by EugW, Oct 5, 2017.

  1. EugW macrumors 68040


    Jun 18, 2017
    Things are looking good for the 2018 iMacs. You can get a base model Coffee Lake Intel 8th Generation 6-core i5-8400 that will beat the current top of the line i7-7700K in most tests. And even when it loses to the 7700K, it's usually quite close in performance. Furthermore, the i5-8400 is a 65 Watt chip so it should remain quiet under most usage, unlike the very hot i7-7700K. But if heat and noise don't bother you, you can also go for the i7-8700K, which wipes the floor with the i7-7700K. All of these also include Intel Quick Sync, with full hardware 10-bit 4K HEVC decode, but the 7xxx Kaby Lake series already includes this. (The 6xxx series does not. 8-bit only.)

    Too bad I couldn't realistically wait another year. I would have loved to get one of these i5 chips in an iMac.




    I was expecting some other chips like an i5-8600 non-K and/or i5-8500 non-K, but haven't seen any mention of those. There is an i7-8700 non-K, but I suspect Apple would reserve that for the 21.5" iMac or equivalent.
  2. playaproved macrumors 6502

    Sep 29, 2005
    I’d planned on getting a new iMac for Christmas, but it looks like I’ll be waiting for this refresh.
  3. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

    Aug 5, 2001
    Nice to see that AMD's reentry appear to have stirred up Intel a bit. Some nice increases across the board on the latest chipsets.
  4. redheeler macrumors 603


    Oct 17, 2014
    New Mac mini with Coffee Lake quad-core i5, USB-C/Thunderbolt 3, upgradable DDR4 RAM... Ok I'm really dreaming now.
  5. EugW thread starter macrumors 68040


    Jun 18, 2017
    Yes, I think you're dreaming. But that would be awesome.

    Interestingly though, now even the Core i3 models are half decent.
  6. redheeler macrumors 603


    Oct 17, 2014
    Indeed it would be. But the way Apple is behaving, it seems I'm just going to have to stick to my power-hungry Mac Pro 5,1 tower.
    --- Post Merged, Oct 6, 2017 ---
    Interestingly enough, I also use my 2010 iMac occasionally as a display for said Mac Pro. For the 2010 27-inch models it will work with non-Mac graphics cards (such as the one in my 5,1), and Windows PCs. 2011 iMacs started requiring Thunderbolt meaning it was no longer possible to connect either of these.
  7. BergerFan macrumors 68020


    Mar 6, 2008
    Mos Eisley
    In theory, you can wait forever, but have commit sooner or later. The speed of progress is impressive. There I was, thinking I had the cutting edge(I guess I do, but not for long, lol).
  8. sublunar macrumors 6502a

    Jun 23, 2007
    These Coffee Lake desktop parts suggest a slaughtering of the 4 core benchmarks. I had assumed i5 would go 4 core 8 threads but 6 cores 6 threads is just as huge. The Anandtech article is well worth a read on this.

    It's way too soon for Apple to be refreshing the iMac barely 5 months after the last one brought USB-C/Thunderbolt 3 to the iMac line. And it would seriously dent iMac Pro sales if you could pick up a 6 core/12 thread iMac not long before an 8 core/16 thread Xeon iMac Pro was available.

    If these figures translate over to the mobile side of things the 2018 MacBook Pros ought to be very interesting.
  9. WilliamG macrumors G3

    Mar 29, 2008
    I would be so happy I can’t even...
  10. Rockadile macrumors regular

    Jun 11, 2012
    8700k and Vega in Mac Pro like body. My wallet is ready Apple.

    Call it simply, Mac.
  11. PortableLover macrumors 6502a

    Apr 14, 2012
    I wonder if apple would make any i3 imacs now that they are 4 cores. Maybe go for a lower price.
  12. Sheza macrumors 68000


    Aug 14, 2010
    Croydon & London At The Same Time
  13. tn-xyz macrumors member


    Sep 13, 2017
    and the next one will be "slower" than the following one.
    it's a never-ending circle. if that's your concern, you can't buy anything ever.
  14. fokmik macrumors 68000

    Oct 28, 2016
    Nice upgrades for next year, lets hope a little redesign as well with face id and new i5 and i7
  15. klatox macrumors member

    Dec 24, 2015
    Looking at the iMac refresh cadence, May/June and Oct/Nov are the typical refresh months. Perhaps we will see a refresh this year with these newer processors. I actually kind of hope not because I'm with the previous poster in terms of wanting FaceID (and a better top-end GPU, and faster RAM, and a FaceTime HD camera), and all of that would be too much for a simple refresh I would imagine.
  16. EugW thread starter macrumors 68040


    Jun 18, 2017
    They would have been developing that in advance for such chips so it could come out anytime. However, I just think for marketing reasons they’ll keep them for 2018.

    I suspect that as advertised, the iMac Pro will come out in December, and then several months later or even as late as summer will bring new Coffee Lake iMacs, possibly with a new form factor.

    Then with macOS 10.14, Apple will bring 4K iTunes and Netflix will bring 4K as well, to both Coffee Lake and Kaby Lake iMacs, excluding the Skylake Macs or earlier. Skylake does not have the necessary hardware for this, but introducing DRM’d 4K streaming to Macs in 2018 may ease the pain for Skylake owners nonetheless.

    Maybe i3 for an edu model or entry level 21.5” not other ones. No Turbo Boost for i3.
  17. skaertus macrumors 68030


    Feb 23, 2009
    The next year iMac may be worth waiting. The Coffee Lake processors seem to be a great update over Kaby Lake. Intel is finally introducing six core processors to its mainstream line, and that looks a great improvement in performance.
  18. ljonesj macrumors 6502a


    Oct 20, 2009
    Kingsport TN
    The only thing is I’ve seen a lot of the tech YouTuber’s bench the coffe lake chips and they all run hotter than kaby and the ryzen chips are actually cool jayztwocents actually put an aio water cooler on his coffe lake 8700k as it was hot even on the best air cooler were the ryzen was perfectly fine
  19. cynics macrumors G4

    Jan 8, 2012
    Assuming Apple doesn't redesign to account for heat a 65w CPU with that much power would be awesome. I would definitely update.
  20. cube macrumors G5

    May 10, 2004
    The 8400 would be a complementary alternative to the 1600, but there are no budget motherboards.
  21. theluggage macrumors 68040

    Jul 29, 2011
    Frankly, if the 65W 8th gen i5 is going to be faster than the current 91W i7, it sounds like the sweet spot for an all-in-one, so dropping the i7 option and re-designing the iMac for 65W max actually starts to look like a sensible option - leaving the field clear for the iMac Pro and Mac Pro,

    Otherwise, the 6-core 8700K would be nipping at the heels of the 8-core Xeon, might even beat it on single-core benchmarks (and Xeons tend to get updated less frequently).
  22. klatox macrumors member

    Dec 24, 2015
    I wonder, since the i5 8400 is more powerful than the i7 7700k, then they might go with that on the top end and allow for a more powerful GPU as well.
  23. sublunar macrumors 6502a

    Jun 23, 2007
    Marketing would have an interesting time of it, since everything has to be 'a bit higher' with successive models of iMac. This is why high end models of the 27" iMac use the K series CPUs without utilising the unlocked clock multiplier.
  24. klatox macrumors member

    Dec 24, 2015
    Good point.
  25. Lesser Evets macrumors 68040

    Lesser Evets

    Jan 7, 2006
    I was hoping that Apple would turn out new high-end iMacs with Coffee Lake when they release the PoweriMacProSupremeDelux in December 2017...

    Hope doesn't work with Apple products, though.

    They could release them as early as March '18, per general schedules of updates. That's probably hopeful, as well, so in reality, those Coffee Lakes will be here in June '18. Just in time for Intel to release Cannon, or even Ice, Lake.

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