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I7 5775c at 4.2ghz but 4.4ghz possible.

Discussion in 'Processors and motherboards Intel' started by GhostXL, Nov 21, 2016.

  1. GhostXL

    GhostXL Ancient Guru

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    Hello, I've been looking around the web, and have seen the I7 5775c at 4.4ghz stable. I've hit 4.2ghz at 1.3v, and curious if anybody here owns one of these, or knows of a way to reach 4.4 stable without blowing anything up. :)

    Everytime I found a forum or article with this chip at 4.4ghz, they never gave the details, just that they did it and had proof in cpu-z.

    I mean at 4.2ghz this chip is faster than the 4790K I had at 4.7ghz, but I would like to get more out of it if I can.
     
  2. -Tj-

    -Tj- Ancient Guru

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    I saw 2-3 users and asked them a bit sometime ago, most need 1.35 - 1.40v for ~ 4.3 - 4.4Ghz..
    2 were from @techpowerup.


    Btw faster where, in synthetic benchmarks or?

    From what I saw its mostly synthetic, games not so much. Ok there are exceptions but it looks minimal


    Maybe you will find anything useful here, all reviews in one place
    https://www.techpowerup.com/reviewdb/Processors/Intel/Core-i5-and-i7-Broadwell/




    EDIT: whats your cache freq. like? Are you trying to run it in sync too?:nerd:


    This looks important as well, maybe use a bit lower (1650-1750mhz) by higher cpu OC.
    http://www.legitreviews.com/edram-overclocking-on-the-intel-core-i7-5775c-broadwell-cpu_167425
     
    Last edited: Nov 21, 2016
  3. GhostXL

    GhostXL Ancient Guru

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    My games get me a much more stable framerate and higher minimum FPS, actually it's better all around. My guess is the huge L4 cache helping.

    It's enabled and I OC'd the L4 cache from 1.8ghz to 2ghz. Noticed a huge difference in memory benchmarks just from doing that. AIDA 64 benches went up.

    I see they recommend to stay close to 1800mhz, maybe I just got a good chip. Most can't keep theirs stable at 2ghz with 4.2ghz.

    My games just run like butter with this chip, I would get some stuttering with the 4790K even at 4.7ghz. It all went away with this chip.

    Plus it did run hotter of course.

    I will look into the links and see what I can find.
     
  4. -Tj-

    -Tj- Ancient Guru

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    2GHz is good and actually a bit high, apparently its possible up to 2.1 -2.2GHz (intel internal labs).

    Well its worth a try to lower it ~1800-1900mhz and try higher cpu multi 43x - 44x at idk 1.34 or 1.38v
     

  5. GhostXL

    GhostXL Ancient Guru

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    I may try to do that. I went with this chip to avoid upgrading everything like mobo and ram.

    Kinda glad I did cuz I'm outperforming the 6700k in AIDA 64 tests and even 3Dmark.

    But that is OC'd to 4.2ghz. Right now I have a 24% OC on this thing, and wanted to try to make it 25% stable. I may try upping the voltage to 1.34 and 43x in a few mins here.

    -EDIT-

    I was able to hit 4.3 stable at 1.38v. I was even able to leave the cache at 2ghz. I musta got a good chip. Can't seem to hit 4.4ghz though even turning down the cache back to 1.8ghz stock.

    That's alright, It's amazing what this chip can do at 4.3ghz. It's pretty much eating the 6700k alive in AIDA 64 benches, and in games. This L4 cache makes up for the ghz.
     
    Last edited: Nov 22, 2016
  6. mad4

    mad4 Member

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    Not too many with these chips,have its little brother,the i5 5675C,and can pretty much relate to your findings.
    Have it at 4200mhz with 1.29 vcore,cache at 3700mhz and edram/L4 at 1800mhz.
    Thats on a Msi Z97 Gaming M,where Msi never got the Broadwell bios quite right,cause i can up the L4 to 2000mhz,
    but after sleep,coldstart or a restart,it defaults back to the 1800.Looks like Asus did a better job there.
    Annoys me a bit,cause it seems stable enough.
    But what is you main cache(not L4) at ? It hurts performance a little,if its too low from cpu speed.
    :pc1:
     
  7. GhostXL

    GhostXL Ancient Guru

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    Mine isn't letting me move from 3.6ghz.

    I tried setting cache to 1.8 and it still won't budge.

    But the thing is fast as ever so it's not hurting me any.
     
  8. Undying

    Undying Ancient Guru

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    That's sad, Broadwell overclocks like poo. :D
     
  9. thatguy91

    thatguy91 Ancient Guru

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    It's not surprising, it was a heavily delayed CPU that eventually just got a small release. Not sure what the issues were, maybe it was that they couldn't hit target clocks with the earlier revisions?
     
  10. GhostXL

    GhostXL Ancient Guru

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    Well no I can OC the chip to 4.3ghz which is a 25-26% OC.

    Just the cache OC does not go too high.

    It's not a problem with my L4 cache OC'd to 2ghz.

    Faster than my old 4790K was.

    I think you guys misread. We were talking about the cache OC not core OC.

    This chip at 4.3ghz ripped my 4790k at 4.7ghz apart in AIDA 64 benches, gives higher minimum fps in games.
     
    Last edited: Nov 26, 2016

  11. nav-jack

    nav-jack Master Guru

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    i'll chip in here since i just recently upgraded my 5775c to a 5820k

    now my 5775c i had at... what... 4.2ghz 4.3ghz? something like that. 1.375v. the cache i believe was at around 4ghz maybe. wow my memory is bad.

    anyway. 5820k. 4.583ghz right now with a 127.3mhz bclk and 3.5ghz cache @ 1.3v

    the 5775c does get better min fps, no matter what i tweak on this 5820k i can't beat some of the graphical benchmark scores.

    there are a couple other synthetic benchmarks that i still loose to the 5775c but not many, really has to do with that L4 cache.

    i never had much luck with better performance overclocking the L4 cache, it'd always give lower numbers when i did, so i left it at default.

    using the 5775c in a ECS z97 motherboard resulted in VERY weird behavior, but in my asus z97a and sabertooth motherboards it was right at home and perfect.

    i lost my train of thought, you can ask whatever, i know i'm necro bumping kinda but this subject was interesting to me.
     

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