1. Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Intel i7-8700K Coffee Lake Memory Benchmark Analysis

Discussion in 'Reviews' started by W1zzard, Oct 12, 2017.

  1. W1zzard

    W1zzard Administrator Staff Member

    Joined:
    May 14, 2004
    Messages:
    16,883 (3.44/day)
    Thanks Received:
    17,779
    Last edited: Oct 12, 2017
    yogurt_21, 3rold, Prima.Vera and 22 others say thanks.
    10 Year Member at TPU
  2. dcf-joe

    dcf-joe

    Joined:
    Feb 11, 2008
    Messages:
    527 (0.15/day)
    Thanks Received:
    155
    Location:
    Lincoln, Nebraska, USA
    I want to thank you guys for taking the time to do these tests. I found this review very informative.
     
    Prima.Vera, ZeppMan217, HD64G and 2 others say thanks.
  3. Gasaraki

    Joined:
    Nov 29, 2016
    Messages:
    257 (0.79/day)
    Thanks Received:
    71
    That's a lot of damn speeds and timings to test. Thanks.
     
    HD64G says thanks.
  4. EarthDog

    EarthDog

    Joined:
    Dec 31, 2009
    Messages:
    10,715 (3.76/day)
    Thanks Received:
    5,823
    Location:
    Ohio
    Wow... the LOE to do this was a lot!

    Nice to see something we know already proven again with CFL. :)

    EDIT: Something really good to see would be CPU tests in games across multiple levels of cards at multiple resolutions.
     
    HD64G says thanks.
  5. Sasqui

    Sasqui

    Joined:
    Dec 6, 2005
    Messages:
    9,562 (2.21/day)
    Thanks Received:
    3,592
    Location:
    Manchester, NH
    Awesome analysis. Once again, this shows latency is just about as important as speed itself.
     
    HD64G says thanks.
    10 Year Member at TPU
  6. mouacyk

    Joined:
    Feb 1, 2013
    Messages:
    104 (0.06/day)
    Thanks Received:
    29
    Thanks so much for slogging through this review. 3.5% improvement at best, but I'll always tinker any way -- it's fun.
     
  7. bug

    Joined:
    May 22, 2015
    Messages:
    1,992 (2.26/day)
    Thanks Received:
    700
    You never really "know" when it comes to new platforms. We knew CFL hasn't changed the memory subsystem, so we suspected memory speeds won't matter much. Thanks to this article, now we have confirmation.
     
  8. EarthDog

    EarthDog

    Joined:
    Dec 31, 2009
    Messages:
    10,715 (3.76/day)
    Thanks Received:
    5,823
    Location:
    Ohio
    I'm glad you are now in the know, bug. :)
     
    bug says thanks.
  9. bug

    Joined:
    May 22, 2015
    Messages:
    1,992 (2.26/day)
    Thanks Received:
    700
    I'm happy to have made you glad, dawg :p
     
    EarthDog says thanks.
  10. birdie

    birdie

    Joined:
    Apr 18, 2013
    Messages:
    318 (0.19/day)
    Thanks Received:
    164
    So, basically anything above 2666 14-14-34-1T is useless (IOW, the price increase doesn't correspond with performance increase).
     
    TheHunter says thanks.
  11. HD64G

    HD64G

    Joined:
    Apr 30, 2011
    Messages:
    754 (0.32/day)
    Thanks Received:
    681
    Location:
    Greece
    Great work @W1zzard! I hope the same test will be done for Ryzen 3,5,7 at least for 5 of the frequecies (2133, 2400, 2933, 3200, 3600). Forgive me if done already and forgot about.
     
  12. W1zzard

    W1zzard Administrator Staff Member

    Joined:
    May 14, 2004
    Messages:
    16,883 (3.44/day)
    Thanks Received:
    17,779
    https://www.techpowerup.com/reviews/AMD/Ryzen_Memory_Analysis/

    No plans for another article, but we'll probably look at it again with AMD's next-gen, whenever that comes out.
     
    HD64G, TheinsanegamerN and EarthDog say thanks.
    10 Year Member at TPU
  13. hkpolice2

    Joined:
    Jun 6, 2009
    Messages:
    1 (0.00/day)
    Thanks Received:
    0
    How about 5Ghz gaming tests /w the uncore maxed out on a GTX 1080Ti? I doubt the stock 4.3Ghz core & 3.7ghz uncore speed is enough to max out the memory @ 3600mhz+
     
  14. BMfan80 New Member

    Joined:
    Oct 8, 2017
    Messages:
    3 (0.23/day)
    Thanks Received:
    1
    Thank you for the analysis.

    Sorry it's taken me sooo long to say thanx,even the hardware i don't care about is a good read here.
     
  15. ORLY New Member

    Joined:
    May 19, 2015
    Messages:
    3 (0.00/day)
    Thanks Received:
    0
    Civilization VI, F1 2017, Fallout 4, Far Cry Primal, Total War: Warhammer?
    Would be cool to compare Coffee Lake to Ryzen where the frequencies [could] really matter for Ryzen.
     
  16. Folterknecht

    Joined:
    Feb 20, 2007
    Messages:
    317 (0.08/day)
    Thanks Received:
    211
    Location:
    Where the beer is good
    Persoanlly I 'd be more interested in min FPS (min 1%) - that aside nice review!
     
    10 Year Member at TPU
  17. Frick

    Frick Fishfaced Nincompoop

    Joined:
    Feb 27, 2006
    Messages:
    14,762 (3.47/day)
    Thanks Received:
    5,431
    If you look at the Ryzen link wiz posted you see Ryzen gains about the same as Coffee Lake, ie slim. At least above 2666Mhz.
     
    10 Year Member at TPU
  18. Ninjachopstixx

    Ninjachopstixx

    Joined:
    Nov 23, 2012
    Messages:
    4 (0.00/day)
    Thanks Received:
    0
    Location:
    London
    Thanks for the great article guys, appreciate the hard work on all of your articles!
     
  19. R-T-B

    R-T-B

    Joined:
    Aug 20, 2007
    Messages:
    7,091 (1.91/day)
    Thanks Received:
    6,371
    We now know however that ram clocks determine infinity fabric speeds, and as such, interthread communication benefits massively from higher speed ram on Ryzen, something not really covered in that review.
     
    HD64G, Frick and EarthDog say thanks.
    10 Year Member at TPU
  20. TheinsanegamerN

    Joined:
    Dec 28, 2012
    Messages:
    795 (0.45/day)
    Thanks Received:
    288
    Seems like low latency 3000 MHz memory would be the best bet, both from peak performance and the variety of choice available. I am curious what the raw bandwidth coffee lake gets from each set speed.

    Clearly it doesnt make that much difference. If it did, the multi core encoding benchmarks would have shown massive boosts from higher speed memory. Same with the compression and rendering benches. The performance improvements were in line with what coffee lake gains, suggesting that infinity fabric was not a bottleneck there.

    I'm pretty sure AMD would have pushed the multiplier up if there was that much performance left on the floor.

    Based on? Games have not been memory bandwidth limited for a very, very long time. DDR4 finally pushed the last holdouts, games like supreme commander, to their limits, and it is highly unlikely going from 4.3 to 5 GHz would significantly increase memory bandwidth demand to make the jump from 3000 to 3600Mhz memory noticeable. Going from 2666 to 3000 already shows practically no performance gain.

    Game engines are simply not built to handle that much power. to benefit, you would need a game engine built to use that much bandwidth effectively, and such an engine would not work on consoles. Outside of perhaps cloud imperium, I cant imagine anybody modding a PC engine that much.
     
    Last edited: Oct 12, 2017
  21. Manu_PT

    Joined:
    Dec 15, 2016
    Messages:
    213 (0.69/day)
    Thanks Received:
    54
    Altho I respect the reviewer for this immense work, the gaming benchmarks are flawed. Dishonored is well known for being limited and you can see it on 720p and 1080p tests where it has basically the same framerate. Hitman also isn´t the best game to bench CPU/RAM. Battlefield 1 and Witcher 3 on the other hand are useful. I would suggest you bench other intensive CPU games that are played on 144hz/240hz like Pubg and Quake Champions for example.

    From the tests around the web, never a 3200mhz low latency kit would be on par with a 4000mhz CL19 one. Not when the GPU isn´t the bottleneck (aka with usage below 80%). E-sports players usually get the higher frequency ram kits to sustain better minimum fps. The gaming tests ended up confusing because 2 games shouldn´t be tested at all. And you should provide numbers about minimum fps/0,1%, wich are the most affected by increasing Ram Speed.
     
  22. EarthDog

    EarthDog

    Joined:
    Dec 31, 2009
    Messages:
    10,715 (3.76/day)
    Thanks Received:
    5,823
    Location:
    Ohio
    Dont hesitate to go look for testing on the web. ;)

    It depends on testing, but there can be no to significant gains... here is an excerpt from the recent anand article in ryzen memory scaling..

    testing online only games is a terrible idea....

    Outside of that, i agree.
     
  23. Sasqui

    Sasqui

    Joined:
    Dec 6, 2005
    Messages:
    9,562 (2.21/day)
    Thanks Received:
    3,592
    Location:
    Manchester, NH
    Not saying you're wrong, just that the review is meant to cover a cross section of popular games, not just the ones that are really CPU bound. I think that's fair and also shows which ones are and aren't.
     
    10 Year Member at TPU
  24. R-T-B

    R-T-B

    Joined:
    Aug 20, 2007
    Messages:
    7,091 (1.91/day)
    Thanks Received:
    6,371
    Clearly? Clearly you are accepting the results without thinking too in detail about them. There's a reason W1zzard himself contradicts them in this very review.

    Hint: Encode doesn't use intercore communication much at all.

    Other hint: What does infinity fabric do?
     
    10 Year Member at TPU
  25. Manu_PT

    Joined:
    Dec 15, 2016
    Messages:
    213 (0.69/day)
    Thanks Received:
    54
    Fair enough, but we can´t conclude that higher frequency RAM isn´t worth for gaming. Depends on your usage, and again, minimumfps/0,1% are too important on a RAM Gaming test. Also you can´t get CAS 14 kits that easy, not at 3200mhz for sure. You can downclock 3800mhz CAS19 to 3200mhz CAS 14 tho, but that would cost the same money.
     

Currently Active Users Viewing This Thread: 3 (0 members and 3 guests)