Quick question: i5 8600k?
Quick question: i5 8600k?
I own an i5 8600k OC at 5ghz with 1.415v, temperatures stay within normal ranges (65-72°C) during games. People on Google share mixed advice—some mention heat as the main issue, others warn against exceeding 1.4v. My concern is whether running at 5ghz safely at 1.415v is okay if temperatures remain stable. In a Prime95 stress test, core temps peaked at 83°C. I also noticed high CPU usage in games like GTA V and Rust, wondering if this relates to my overclocking.
It's best to keep the voltage below 1.35v for that chipset. Also, let me know what cooling solution you're using, the motherboard model and BIOS version, and the current room temperature. Overclocking needs low voltage and temperature to maintain stability over time. Going too high risks the CPU failing or the motherboard's power delivery failing.
It's best to keep the voltage below 1.35v for that chipset. Also, let me know what cooling solution you're using, the motherboard model and BIOS version, and the current room temperature. Overclocking needs low voltage and temperature to maintain stability over time. Going too high risks the CPU failing or the motherboard's power delivery failing.
I plan to set it at 4.8ghz with 1.335v.
Another question: Should I keep the voltage as low as possible or is it acceptable to use a bit higher than necessary?
Added: My motherboard is Z370-P.
I use a Noctua cooler, which works well.
And of course, thermal paste.
The suitable range should be between 1.25v and 1.35v, not higher. Adjust lower if your processor binning is exceptional!
Maintaining low voltage is beneficial, but ensure stability of the processor/system at those levels and that your system remains functional with reduced clocks/volts for your specific tasks or workloads.
Noctua offers several cooler options; which one do you have? You might have missed answering the other questions.
shadowcat777
,
This is from our
Sticky
in the CPUs Forum, but I recommended that you read the entire Guide to get the most out of it. Here's the link:
Intel CPU Temperature Guide 2021
Section 8 - Overclocking and Voltage
No two processors are identical; each is unique in voltage tolerance, thermal behavior and overclocking potential, which is often referred to as the "silicon lottery".
•
Overclocking is always limited by two factors; voltage and temperature.
As Core speed (MHz) increases, Core voltage (Vcore) automatically increases to maintain stability. However, it's
not
recommended to overclock using “Auto” BIOS settings or motherboard OC tuning features, as significantly more Vcore than necessary is applied to maintain stability, which needlessly increases Power and heat. It's instead
highly
recommended to use only "manual" Vcore in BIOS. Most overclocking guides explain how. Since overclocked processors can run more than 50% above rated TDP,
high TDP air or liquid cooling is crucial
.
Each Microarchitecture, which is expressed in "nanometers" (nm), has a “Maximum Recommended Vcore”. For example, it’s important to point out that 22 nanometer 3rd and 4th Generation processors will
not
tolerate the higher Core voltages of other Microarchitectures.
Here's the Maximum Recommended Vcore per Microarchitecture from 14 to 65 nanometers since 2006:
Figure 8-1
We know that over time, excessive voltage and heat damages electronics, so when using manual Vcore settings in BIOS, excessive Core voltage and Core temperature can cause accelerated "
Electromigration
". Processors have multiple layers of hundreds of millions of microscopic
nanometer
scale components. Electromigration erodes fragile circuit pathways and transistor junctions which results in the
degradation
of overclock stability, and thus performance.
Although your initial overclock may be stable, degradation doesn't appear until later, when increasingly frequent blue-screen crashes indicate a progressive loss of stability. The more excessive the levels of voltage and heat and the longer they're sustained determines how long until transistor degradation destabilizes your overclock. Decreasing overclock and Vcore may temporarily restore stability and slow the rate of degradation.
Extreme
overvolting can cause degradation in minutes, but a sensible overclock remains stable for years.
Each Microarchitecture also has a "
Degradation Curve
". As a rule, CPUs are more susceptible to electromigration and degradation with each Die-shrink. However, the exception to the rule is 14 nanometer (nm) Microarchitecture, where advances in
FinFET
transistor technology have improved voltage tolerance.
Here's how the Degradation Curves correspond to Maximum Recommended Vcore for 22 nanometer 3rd and 4th Generation, which differs from 14 nanometer 5th through 10th Generation:
Figure 8-2
Degradation Curves are relative to the term “
Vt
(
Voltage threshold
)
Shift
” which is expressed in millivolts (mv). Users can not monitor Vt Shift. With respect to overclocking and overvolting, Vt Shift basically represents the potential for
permanent
loss of normal transistor performance. Excessively high Core voltage drives excessively high Power consumption and Core temperatures, all of which contribute to gradual Vt Shift over time. Core voltages that impose high Vt Shift values are
not
recommended.
To achieve the highest overclock, keep in mind that for your final 100 MHz increase, a corresponding increase in Core voltage of about 50 millivolts (0.050) is needed to maintain stability. If 70 millivolts (0.070) or more is needed for the next stable 100 MHz increase, it means you're attempting to overclock your processor beyond its capability. All processors reach a limit where an additional increase in Core voltage will
not
stabilize another 100 MHz increase in Frequency.
Here's an example of a Core Voltage / Frequency Curve:
Figure 8-3
With high-end cooling you might reach your Maximum Recommended Vcore limit before you reach the ideal Core temperature limit at
80
°C. With low-end cooling you’ll reach
80
°C before your Vcore limit. Regardless, whichever overclocking limit you reach first is where you should stop. Thermal testing is explained in Sections 10 through 12.
Remember to keep overclocking in perspective. For example, the difference between 4.5 and 4.6 GHz is less than 2.3%, which has no noticeable impact on overall system performance. It simply isn’t worth pushing your processor beyond recommended Core voltage and Core temperature limits just to squeeze out another 100 MHz.
•
CPU Overclocking Guide and Tutorial for Beginners
Intel Extreme Tuning Utility
Intel Performance Maximizer
CT