EVGA

Core i7 7700k Stuck at 4.37Ghz on Prime95

Author
Post
Essentials Only Full Version
sullyman24
New Member
  • Total Posts : 3
  • Reward points : 0
  • Joined: 2009/01/05 11:14:59
  • Status: offline
  • Ribbons : 0
2018/04/23 22:23:41 (permalink)
G'day all,
I recently upgraded core i7 7700k on my EVGA z170. I updated my bios to 2.05 and began some overclocking test. I was aiming for 4.7Ghz with a 1.35VCore, but I noticed that I didn't even break 4.37 Ghz on my test. I tried literally everything to break past it. cores are all synced, and I'm confident that I added enough voltage to fuel this demand. However, my core literally stuck at 4.37 Ghz. Here's the weird part. On idle, my CPU says it's at 4.69Ghz, on idle... But on Prime95 it'll drop to 4.37Ghz. No idea why.
I tried looking online for solutions, and noticed that people did encounter the same problem with their z170. However, I tried their solutions, but to no avail. (eg. change power consumption, sync cores, turbo mode on/off etc).
Can anyone help me out here?
#1

5 Replies Related Threads
    Sajin
    EVGA Forum Moderator
    • Total Posts : 49167
    • Reward points : 0
    • Joined: 2010/06/07 21:11:51
    • Location: Texas, USA.
    • Status: offline
    • Ribbons : 199
    Re: Core i7 7700k Stuck at 4.37Ghz on Prime95 2018/04/23 22:54:04 (permalink)
    Set your avx ratio offset to 0.


    See my current build here: https://forums.evga.com/My-bench-rig-unlimited-power-m3596024.aspx
    RTX 2080 Ti 4-way SLI?!?!: https://forums.evga.com/RTX-2080-Ti-4way-SLi-set-by-yours-truly-m2954756.aspx
    #2
    sullyman24
    New Member
    • Total Posts : 3
    • Reward points : 0
    • Joined: 2009/01/05 11:14:59
    • Status: offline
    • Ribbons : 0
    Re: Core i7 7700k Stuck at 4.37Ghz on Prime95 2018/04/24 01:25:56 (permalink)
    Thank you very much @Sajin! Your solution worked and i'm running 4.66 (4.70) consistent now. What is an AVX Ratio though? 
    #3
    Sajin
    EVGA Forum Moderator
    • Total Posts : 49167
    • Reward points : 0
    • Joined: 2010/06/07 21:11:51
    • Location: Texas, USA.
    • Status: offline
    • Ribbons : 199
    Re: Core i7 7700k Stuck at 4.37Ghz on Prime95 2018/04/24 09:56:59 (permalink)
    No problem. By default the avx ratio is set to a number higher than 0. The reason it's set like that is because applications that use avx instructions cause the cpu to draw more power, and are really stressful on the cpu.
    post edited by Sajin - 2018/04/24 10:35:42


    See my current build here: https://forums.evga.com/My-bench-rig-unlimited-power-m3596024.aspx
    RTX 2080 Ti 4-way SLI?!?!: https://forums.evga.com/RTX-2080-Ti-4way-SLi-set-by-yours-truly-m2954756.aspx
    #4
    Y3didya
    Superclocked Member
    • Total Posts : 219
    • Reward points : 0
    • Joined: 2018/01/16 14:12:16
    • Location: Hesse, Germany
    • Status: offline
    • Ribbons : 0
    Re: Core i7 7700k Stuck at 4.37Ghz on Prime95 2018/04/26 08:11:26 (permalink)
    AVX is an instruction set and puts more load on the CPU. You used a version of Prime95 which utilizes AVX. For future use Prime95 26.6

    • EVGA X299 Dark • Intel Core i9 7920X • 32GB G.Skill Trident Z RGB DDR4-3200 CL14 • Seasonic PRIME 80+ Platinum 850W • EVGA GTX 1080 Ti K|NGP|N Hydro Copper
     

     
    Click here to save 3%-10% on your next EVGA purchase - My associates code is ZQ9K3H42VHCXOEM
     
    || Thank you justin_43, liked your Signature format so had to adapt it :)
     
    #5
    quadlatte
    CLASSIFIED ULTRA Member
    • Total Posts : 7191
    • Reward points : 0
    • Joined: 2006/09/14 16:52:58
    • Location: Greensboro, NC
    • Status: offline
    • Ribbons : 56
    Re: Core i7 7700k Stuck at 4.37Ghz on Prime95 2018/05/02 23:21:34 (permalink)
    If avx is set at 3 in bios then your clocks will drop 300mhz when avx is used in prime, or in any other program, since as stated avx is very stressful.

                                   
                                                 Heatware: http://heatware.com/eval.php?id=72498
    #6
    Jump to:
  • Back to Mobile