Overclocking Intel I7 4770K device
Overclocking Intel I7 4770K device
I'm attempting to push the overclock of an
I7 4770K on an
MSI Z87-G41
motherboard with
2X4GB DDR3 1886. (Latest BIOS, Water Cooling)
To determine the peak CPU speed I adjusted the RAM to 1600 with 1.5v, and configured the ring ratio to 30 (3.000 Mhz) using VCCIN at 1.9v, while turning off LLC EIST and C-state.
During stability checks with LinX, the CPU Ratio at 45 does not remain stable (crashes) even when running at 1.4v of vcore. The voltages are currently in override mode.
At this stage, I'm only achieving stability with a CPU ratio of 42 (and am looking for a lower voltage, like 1.32v).
Based on my research about these CPUs and the outcomes observed (or frequency limits with reduced voltages), I suspect there may be an issue.
Could you confirm if this is typical?
Additionally, what steps should I take to improve stability at higher frequencies—or if I need to settle for a maximum of 4200 with a lower voltage?
Yes. As Core speed (MHz) is increased, Core voltage (Vcore) must also be increased to maintain stability. This also increases Power consumption (Watts) which increases Core temperatures.
Conversely, when a processor is delidded, the resulting decrease in Core temperatures increases and enhances stability.
Here's an interesting Tom's video interview where
Intel Discusses i7-4790K Core Temperatures and Overclocking
. The principles and details mentioned in this video also apply to all processors, including your 4770K.
As per Intel in this video, and as illustrated in the Core temperature scale of my previous post, less than 80°C is your ideal target. Further, I can not overemphasize that for 22 nanometer...
I own a 4670k that matches the same CPU without hyperthreading, reaching up to 4.3Ghz. We've both had bad luck with the silicon lottery.
Robox, 1.4 The Vcore will rapidly deteriorate in 22 nanometer processors, such as the i7-4770K and its successor, the i7-4790K. Even though 1.400 is the upper limit suggested for 14 nanometer chips, 1.300 is the upper limit for 22 nanometer chips, which remains safely below the degradation (electromigration) line. Here are the maximum recommended Core voltages for microarchitectures ranging from 14 to 65 nanometers since 2006: No two chips match exactly; each has distinct voltage tolerance, thermal response, and overclocking capacity, often called the "silicon lottery." I want to highlight that the 4790K tends to perform better as an overclocker compared to the older 4770K. In my tests on the 4770K, out of seven samples I tried, speeds varied between 4.1 and 4.7GHz. Your results seem to fall in the lower end of what is typical. Overclocking is constrained by two main aspects: voltage and temperature. Too high a Vcore and excessive heat can cause accelerated electromigration. This early wear happens because the traces and junctions inside the processor get damaged, leading to blue-screen errors that grow more common over time. Generally, CPUs become more vulnerable to electromigration with each die-shrink. The exception is Intel’s 14 nanometer design, where improvements in FinFET transistor tech have enhanced voltage tolerance. When adjusting your processor near its top overclock limit, remember that for every 100 MHz increase, you typically need about 50 millivolts more to keep it stable. If a further 70 millivolts or more is required for the next stable 100 MHz boost, it indicates you’ve exceeded its safe range. With strong cooling solutions, you might hit the Vcore cap before reaching 85°C. With weaker cooling, you’ll reach it at 85°C. In any case, stop once you surpass the indicated limits. Here’s the general core temperature operating window: Temperatures above 85°C are discouraged. Temperatures below 80°C are preferred. Core temps fluctuate with room temperature, which is considered normal around 22°C or 72°C internationally. Keep overclocking within context. For instance, the gap between 4.2 and 4.3Ghz is only 2.4%, which doesn’t significantly affect overall performance. It’s not worth exceeding recommended core voltage and temperature just to squeeze out another 100 MHz. CPU Overclocking Guide and Beginner Tutorials: - http://www. - Intel Temperature Guide - https://forums.
I discovered the setup at 4200 with a vcore of 1.2v (20 cycles of linx with stable temperature).
If I raise the frequency, the required vcore becomes too high, minimum 1.4.
Is this typical?
Additionally, if I remove the cooling paste and perform tests at 10-15 degrees lower than the actual 4500 under linx,
could it affect stability at [email protected]?
Yes. As Core speed (MHz) is increased, Core voltage (Vcore) must also be increased to maintain stability. This also increases Power consumption (Watts) which increases Core temperatures.
Conversely, when a processor is delidded, the resulting decrease in Core temperatures increases and enhances stability.
Here's an interesting Tom's video interview where
Intel Discusses i7-4790K Core Temperatures and Overclocking
. The principles and details mentioned in this video also apply to all processors, including your 4770K.
As per Intel in this video, and as illustrated in the Core temperature scale of my previous post, less than 80°C is your ideal target. Further, I can not overemphasize that for 22 nanometer processors,
e
xceeding 1.300 Vcore is NOT recommended
.
It simply isn’t worth pushing your processor beyond recommended Core voltage and Core temperature limits just to squeeze out another 100 MHz
.
CT