Are you sure your i5 9600-K is suitable for O/C tasks?
Are you sure your i5 9600-K is suitable for O/C tasks?
Hello, everyone
I've recently joined this forum, even though I've been using TH for years.
I just upgraded my PC:
CPU – i5 9600-K
Motherboard – Asus Rog Strix Z390-F
RAM – G.Skill Trident Z RGB 16 GB @ 3200 MHz
CPU cooler – Cooler Master 212 Black Edition RGB
Stock CPU temperature at idle is 35°C
I watched a YouTube video to try my first over-clocking attempt – here’s the link: https://youtu.be/bD1Ze80GpLo
(Note: the BIOS this model uses might differ from mine)
Following his advice closely (within BIOS limits), I achieved these results roughly:
A) 5.0 GHz – voltage rose to 1.495, temp jumped from 35°C to about 55°C
B) 4.9 GHz – voltage slightly down to ~1.39–1.40, temp around 50°C
C) 4.8 GHz – voltage cut to ~1.35, still ~50°C
D) 4.7 GHz – voltage dropped significantly to 1.296, stable then, temp at 45°C
Before I risk damaging my CPU and motherboard, does this indicate the system is stable at 4.7 GHz? I’m quite surprised by the large voltage drop… or is that normal?
Thanks in advance for any thoughts, and please don’t think these are silly questions – I’m just starting out with overclocking.
WAY
too high
!
makarastar
,
Here's the Maximum Recommended Vcore per Microarchitecture from 14 to 65 nanometers since 2006:
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...
Update - just tried -
The readings show a voltage drop to 1.234 and the CPU around 46 to 47 MHz.
From all these details, is my safe operating area roughly between 4.6 and 4.7 GHz?
I saw some sources mentioning 1.3 volts as a threshold to watch out for, since beyond that CPU health might decline...
If true, then with a stock 9600-K at 3.7 GHz, did I miss a critical specification? Or is staying within 4.6–4.7 GHz still acceptable for this model?
I'll just mention this: you really lack the cooling capacity to be trying this, so stop while you're ahead.
The Hyper 212 is a reliable aftermarket CPU cooler aimed at managing up to - but not quite - 150w of heat.
However, it falls short for high-end overclocks on the 8th, 9th, and 10th generation unlocked CPUs; reaching 150w is effortless for these processors on most benchmarks.
What the heck... this YouTuber didn't even perform the proper stress test for this?
Check if resetting to "stock" is feasible for your motherboard.
It wouldn't be because that is the standard setting in all bios.
I returned to the default BIOS settings. The main adjustment was changing my RAM speed from the default 2300 MHz to 3200 MHz, similar to what I did when doing an OC. Now my CPU performance is at its lowest point of 38 C to 41 C when idle, which matches what I experienced before starting experiments with OC. The motherboard runs steadily at 39*C. The only strange thing is in "CPU-Z" – it lists the default as 3.7 GHz, but the actual speed is varying between 4.3 and 4.6 GHz. This seems to be the Intel Turbo boost effect. Also, the voltage fluctuations are unusual, dropping to a very low 0.6 V and then rising above 1.0 V quickly. After resetting BIOS back to stock, should I avoid setting RAM to XMP 1 or 2?
Correct information provided. When users don't manually overclock their CPUs, the processor's frequency and voltage are automatically adjusted by the operating system (Speed Step) or the CPU itself (Speed Shift). This adjustment aids in lowering power usage and heat generation. I'm not well versed on this topic; perhaps the distinction lies in the timing used.
WAY
too high
!
makarastar,
Here are the optimal Vcore values for various microarchitectures from 14 to 65 nanometers since 2006. We understand that prolonged exposure to too much voltage and heat can harm electronic components. When adjusting Vcore manually in BIOS, excessive core voltage and temperature may trigger faster "electromigration" effects. These effects wear down delicate circuit paths and transistor connections, leading to reduced overclock stability and overall performance.
Even if your initial overclock seems steady, problems usually emerge later—such as more frequent blue-screen errors—that signal a gradual loss of reliability. The greater the voltage and heat applied, and the longer they persist, the sooner transistor degradation will affect your overclock. Reducing both overclock and Vcore can temporarily bring stability back and slow further wear.
Excessive overvoltage can lead to noticeable degradation within minutes, but a well-managed overclock can remain stable for many years. Each microarchitecture has its own "Degradation Curve." Generally, CPUs become more vulnerable to electromigration and degradation as they shrink in size. Notably, Intel’s 14 nanometer architecture benefits from FinFET technology improvements that enhance voltage tolerance.
The Degradation Curves relate to the Maximum Recommended Vcore for 22 nanometers across third- and fourth-generation processors, differing from the 14 nanometer range (5th to 10th generation).
These curves are based on the term "Vt (voltage threshold)," which is measured in millivolts. Users cannot directly track Vt shifts. Regarding overclocking and overvolting, Vt shifts indicate a risk of permanent performance decline. Very high core voltages cause excessive power use and heat, both accelerating gradual Vt shifts. Voltages that produce large Vt shifts should be avoided.
To push your processor to its absolute limit, anticipate a roughly 50 millivolt increase for each 100 MHz boost to maintain stability. If a further 65 millivolts (0.065) or more is required for the next stable jump, it suggests you’re exceeding safe operating boundaries.
With advanced cooling solutions, you might hit your Maximum Recommended Vcore before reaching the ideal core temperature of 80°C. In contrast, lower-end cooling systems will reach that temperature sooner. Regardless, always respect the overclocking limits you encounter first.
The typical safe core temperature range is between 80 and 85°C. Temperatures above 85°C are discouraged, while those below 80°C are preferred. Always consider the bigger picture when adjusting your processor—small changes in speed can have significant effects on system reliability and longevity.