8700k seems stable at 5GHz and 1.275v with H115i cooler. Keep trying to lower volts?

Toggle sidebar Toggle sidebar
A

Amin Sabet

Honorable
Jul 12, 2013
35
0
10,530
Hi all, I am a beginner at CPU overclocking. I'm using a non-delidded 8700k with a Corsair H115i cooler

I started trying at 5GHz and 1.35v, but CPU temps were approaching 100 degrees under load. I tried 1.3v, than 1.275v, and it still seems stable.

At 1.275v and 5GHz, I can run RealBench 2.56 stress test with memory set to "Up to 16GB RAM" for 4 hours without going over 90 degrees or having any apparent instability. Based on my searching the forums, this seems to be a good result for this CPU.

Should I keep trying to lower the volts, or just be happy with what I got? I figure that if I go with the lowest volts that can "pass" RealBench, it might not be enough for real life tasks. And a max of 90 degrees should be fine, right?
 
It looks like you got a gem. You should be happy.
But, I would go as low as possible while the system remains stable.
I have built three 8700k systems and have not been able to go lower than 1.32v @ 5GHz stable.
 
Should I keep trying to lower the volts, or just be happy with what I got?
Click to expand...
You can go lower if you want or if you have heat issues.

I figure that if I go with the lowest volts that can "pass" RealBench, it might not be enough for real life tasks.
Click to expand...
That's true. You might crash while doing something else. Mine passed Prime95 + AIDA64 (12 hours each), crashed while shutting down.

And a max of 90 degrees should be fine, right?
Click to expand...
Max 90c is for stress testing. 80c is the max for daily usage.
------------
BTW, did you enable LLC (Load Line Calibration)? It can help when lowering voltage by preventing voltage drop. Level 4/50% should be a good start.
 
Thanks, everyone!



I'll give it a try, thanks!
 


Here are my full specs:

  • Case: Fractal Define R6
    CPU cooler: Corsair H115i Pro
    Power supply: Corsair HX850i
    OS: Windows 10 Pro 64-bit
    CPU: i7-8700k
    Boot drive: Samsung 970 Evo 1TB NVMe M.2 SSD
    RAM: G.Skill Ripjaws V 32GB 2 x 16GB DDR4-3200
    Motherboard: ASUS ROG STRIX Z370-E
    GPU: NVIDIA GeForce GTX 1070 Founders Edition
    Thermal compound: Arctic Silver 5

And here are my BIOS settings changes:

  • AI Overclock Tuner: Manual
    ASUS MultiCore Enhancement: Disabled
    AVX Instruction Core Ratio Negative Offset: 2
    CPU Core Ratio [Per Core]: Sync All Cores
    1-6 Core Ratio Limit: 50
    CPU SVID Support: Disabled
    CPU Core/Cache Current Limit Max: 255.50
    BCLK Aware Adaptive Voltage: Disabled
    CPU Core/Cache Voltage: Manual Mode
    CPU Core Voltage Override: 1.275
    CPU Load-line Calibration: Level 6
    Intel SpeedStep: Disabled
    DRAM Voltage: 1.3530
    DRAM Frequency: DDR4-3200MHz
    DRAM CAS# Latency: 16
    DRAM RAS# to CAS# Delay: 18
    DRAM RAS# ACT Time: 38
    DRAM Command Rate: 1N

System seems very stable in both stress tests and regular use :).
 
Here are my full specs:

Case: Fractal Define R6
CPU cooler: Corsair H115i Pro
Power supply: Corsair HX850i
OS: Windows 10 Pro 64-bit
CPU: i7-8700k
Boot drive: Samsung 970 Evo 1TB NVMe M.2 SSD
RAM: G.Skill Ripjaws V 32GB 2 x 16GB DDR4-3200
Motherboard: ASUS ROG STRIX Z370-E
GPU: NVIDIA GeForce GTX 1070 Founders Edition
Thermal compound: Arctic Silver 5
Click to expand...
Nice build. 😉

System seems very stable in both stress tests and regular use :) .
Click to expand...
Use for a week, if nothing happens, you could try lowering voltage. But good enough in my opinion. Most people reach 5GHz with 1.30v-1.35v.
 


Thanks! :)



That sounds like a good plan. Thanks, again!

 
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom