Looking for guidance on CPU voltage and overclocking?
Looking for guidance on CPU voltage and overclocking?
Hey everyone
I need a bit of guidance.
My system has an Intel i5 4690k CPU, and I want to give it extra headroom for my GPU, which is a GTX 1070. In some applications it’s reaching full capacity, but the card isn’t using it optimally.
I’ve never overclocked before, but I’ve read about adjusting voltage and clocks carefully—though I’m not sure if that’s safe unless I’m absolutely confident. I don’t want to risk damaging my PC!
CPU core voltage when idle is between 0.711 and 1.000 (in cpu z).
The maximum core voltage shown is 1.249, which appears during stress tests.
In the BIOS, I see:
- CPU input voltage: 1.776
- CPU core voltage: 0.997
(Yellow text says) target cpu turbo mode 4488mhz
All four cores are synced to 44
I have a vague idea of what these numbers mean, but I’m not sure if they’re correct or safe to proceed with overclocking. Any advice would be greatly appreciated!
Lukeus699 is reaching out for assistance. He has an Intel i5 4690k processor and wants to improve its performance for his GTX 1070 graphics card, which sometimes reaches full capacity in demanding tasks. He hasn’t overclocked before but is cautious about making changes unless he’s fully confident they’re safe. His current CPU core voltage range is between 0.711 and 1.000, with a maximum of 1.249 under stress tests. In the BIOS, he sees values like 1.776 for input voltage and 0.997 for core voltage, along with a turbo setting of 4488MHz. All four cores are synchronized at 44 MHz. He’s unsure what settings are optimal and is seeking advice before proceeding. He suggests starting with the stock voltage configuration and increasing the CPU multiplier if stable. He recommends disabling turbo and low-power modes to maintain the set speed. If stability is achieved, a slight increase in the multiplier may be possible. For more advanced users on modern boards, adjusting core voltage could further boost performance, though it risks overheating and reduced lifespan.
cdrkf :
Lukeus699 :
Hey people
I'd like some help if someone wouldn't mind.
I have an Intel i5 4690k cpu and I want to give it a little more headroom for my Gpu which is a gtx 1070, as in some applications it's hitting 100% and the card isn't being fully utilised.
I have never overclocked before but I have done a fair amount reading up on it, however thought of tweaking with voltage and clocks isn't something I want to do unless I'm 100% certain its correct, as I don't wish to blow my pc up!
Cpu core voltage when idle is 0.711-1.000, stated in cpu z
Maximum core voltage displayed is 1.249, which is hit when I do stress test etc.
In the bios however I see the following -
Cpu input voltage - 1.776
Cpu core voltage - 0.997
(yellow text saying) target cpu turbo mode 4488mhz)
All 4 cores synced to 44
I have some sort of idea of what these mean, however I'm not certain on what is exactly correct/safe and what is needed to proceed with the OC.
Any help is welcomed
First thing to try when overclocking is see how far you can get your CPU with *stock voltage* settings.
As you have a 'k' series chip this is really easy- all you need to do is increase the cpu multiplier. To keep things simple disable turbo and any low power modes to force the cpu to run at the set speed.
Try increasing the multiplier by a couple of increments and reboot. If it all seems stable try upping it a little more. If you have a modern motherboard you might be able to do this from within Windows. The idea is to find the maximum stable frequency. Usually if you push it slightly too far the machine will blue screen on boot, in which case you can notch it back to the previous stable setting.
Upping the multiplier is relatively safe. You can potentially increase your overclock further by increasing cpu core voltage however I'd personally avoid that unless you absolutely have to- increasing core voltage dumps more power though the cpu than it's designed to handle and will wear the cpu out faster. It will also generate a LOT more heat- so you need good cooling to get that last little bit.
Hey thanks for the reply!
To set everything back to the base core etc, would this mean disabling Ai overclock tuner from XMP - unto /manual? Also Ez tuning is activated. Gives me the option of power saving, /performance and standard.
With regards to increasing the multiplier, sorry if am wrong, but is this the cpu core ratio(44 for all 4 cores) or is something else, currently navigating through the bios to find it.
It's an Asus z97 pro gamer mobo
Edit-
I turned it back to normal from ez boost, pc restared and it now states-
Cpu turbo frequency is 3900mhz
Dram is 1333mhz
Cache is 3900
Dmi/peg is 100mhz
Lukeus699:
Hey everyone,
I need some assistance if anyone is willing to help.
I own an Intel i5 4690k processor and want to add a bit more headroom for my GPU, which is a GTX 1070. In certain applications it reaches 100%, yet the card isn't being used efficiently.
I'm new to overclocking but I've read about adjusting voltage and clocks. I'm hesitant unless I'm absolutely sure it's safe, just to avoid damaging my PC.
CPU core voltage at idle ranges from 0.711 to 1.000, while the maximum displayed is 1.249, which occurs during stress tests.
In the BIOS I see:
- CPU input voltage: 1.776
- CPU core voltage: 0.997
(Note: yellow text indicates target turbo mode at 4488MHz)
All four cores are synchronized to 44 MHz.
I have a general idea of what these values mean, but I'm unsure about the correct settings or how to proceed safely.
Any guidance would be greatly appreciated.
The first step when overclocking is to check how far the CPU can run at its default voltage settings.
Since you have a 'k' series chip, simply raise the CPU multiplier. Turn off turbo and any low-power modes to force it to run at the set speed.
Increase the multiplier in small steps, restart, and see if stability improves. If it works, gradually increase further. On modern boards, you might adjust settings via Windows. The goal is to find the highest stable frequency—usually a blue screen on boot means you need to lower it back.
Raising the multiplier is generally safe. You could also try boosting core voltage, but that risks overheating and excessive power draw. Good cooling is essential in that case.
Thanks for the advice!
Regarding resetting everything to base settings:
- Disabling AI Overclock Tuner from XMP (to /manual) would be appropriate.
- Ez tuning is active, offering power saving, performance, and standard modes.
With the current setup (Asus Z97 Pro Gamer Mobile), turning it back to normal from EZ Boost shows the CPU turbo frequency at 3900MHz, DRAM at 1333MHz, cache at 3900, DMI/PEG at 100MHz.
It appears your stock configuration matches what you expect. You likely overclocked via auto tools, which are generally safe. Core ratio seems to be the multiplier setting. Raising it should boost speed in steps of 100MHz (e.g., from base 3.9GHz to around 4.6GHz manually). For higher speeds, consider increasing core voltage—but this carries risks of overheating and reduced lifespan.
If performance isn't an issue, I'd probably limit the push unless you plan to keep it for a long time.
I'm seeking some assistance from fellow users.
I own an Intel i5 4690k processor and wish to add a bit more capacity for my GPU, which is a GTX 1070. In certain programs it reaches full capacity while the card isn't being used efficiently.
This has never been my experience with overclocking; although I've studied it thoroughly, adjusting voltage and clock speeds isn't something I'm keen on unless I'm absolutely sure it's safe. I don't want to risk damaging my system.
CPU core voltage at idle ranges between 0.711 and 1.000, as shown in the CPU Z.
The maximum core voltage displayed is 1.249, which occurs during stress tests.
In the BIOS I see:
- CPU input voltage - 1.776
- CPU core voltage - 0.997
(Note: yellow text indicates target CPU turbo mode 4488mhz)
All four cores are synchronized at 44 MHz.
I have a general understanding of these values but am unsure what exactly is correct or safe for proceeding with the overclock. Any guidance would be greatly appreciated.
When attempting overclocking, the first step is to check how far the CPU can run under *default* settings.
Since you're using a 'k' series chip, simply raise the CPU multiplier. Turn off turbo and any low-power modes to ensure stable operation.
Increase the multiplier in small steps, restart, and observe stability. If it holds, gradually raise it further. On modern motherboards, this can often be done via Windows settings. The goal is to reach the highest stable frequency without causing a blue screen at boot.
Raising the multiplier is generally safe. You might also consider boosting core voltage, but I'd avoid that unless necessary—higher voltages waste more power and generate excessive heat, which demands better cooling.
Thanks for the advice!
To revert everything to baseline settings, would disabling the AI overclock tuner in XMP (or switching to manual) be necessary? Also, is Ez tuning active? It gives options like power saving, performance, and standard.
Regarding the multiplier adjustment:
I apologize if I'm mistaken, but isn't the core ratio (44 for all four cores) what we're aiming for? I'm currently checking the BIOS to confirm.
It appears my system was overclocked via auto tools, which are typically safe.
Increasing core voltage is risky and could shorten the CPU's lifespan. It also produces significantly more heat, so proper cooling is essential.
Appreciate your help!
cdrkf :
Lukeus699 :
Hey everyone,
I need some assistance if anyone is willing to help.
I own an Intel i5 4690k processor and want to add a bit more headroom for my GPU, which is a GTX 1070. In certain applications it reaches 100%, yet the card isn't being used efficiently.
I'm new to overclocking but I've read about adjusting voltage and clocks carefully. I wouldn't like to risk damaging my PC unless I'm absolutely sure it's safe.
My CPU core voltage at idle ranges between 0.711 and 1.000, while the maximum displayed is 1.249, which occurs during stress tests.
In the BIOS I see:
- CPU input voltage: 1.776
- CPU core voltage: 0.997
(Note: yellow text indicates target turbo mode at 4488mhz)
All four cores are synchronized to 44 MHz.
I have a general idea of what these values mean, but I'm unsure about the correct settings or how to proceed safely.
Any guidance would be greatly appreciated.
The first step when overclocking should be checking performance with the default voltage configuration.
Since you have a 'k' series chip, simply raise the CPU multiplier. Turn off turbo and any low-power modes to force the CPU to run at the set speed.
Increase the multiplier in small steps, restart after each change. If it stabilizes, try increasing slightly more. On modern boards, you might adjust settings via Windows. The goal is to find the highest stable frequency—usually a blue screen on boot means you need to lower it back to the previous setting.
Raising the multiplier is generally safe. You could also boost core voltage, but I'd avoid that unless necessary, as it drains more power and generates excessive heat, which demands strong cooling.
Thanks for the advice!
Regarding resetting to base settings:
- Disabling AI Overclock Tuner in XMP profiles (to /manual) would help.
- Ez tuning is active, offering power-saving, performance, and standard modes.
Concerning the multiplier adjustment: Is this the core ratio (44 for all cores) or something else? I'm looking it up in the BIOS. It's an Asus Z97 Pro Gamer motherboard.
Edit -
I restored it to normal from Ez Boost. The PC restarted and now shows:
- CPU turbo frequency: 3900mhz
- DRAM: 1333mhz
- Cache: 3900
- DMI/PEG: 100mhz
This confirms the settings are your stock configuration. It seems you've already overclocked via auto tools, which are typically safe.
The core ratio appears to be the multiplier. Raising it should boost speed in steps of 100mhz (e.g., from 3900mhz base to ~4000mhz manually). You might reach around 4.6GHz without changing voltages, but pushing further could risk overheating.
If performance isn't affected by games, I'd hold off on aggressive overclocking unless you plan to keep it long-term.
I re-enabled Ez tuning as it restricts core ratio changes. After saving and exiting, the PC restarted normally.
Regarding shutting down and rebooting: Should the frequency drop back to 3500mhz after a reset?
Also, does HwMonitor report a maximum voltage of 1.274?
Lukeus699 :
Lukeus699 :
Lukeus699 :
Greetings everyone,
I need some assistance if someone is willing to help.
I own an Intel i5 4690k processor and wish to provide it with extra headroom for my GPU, which is a GTX 1070. In certain applications it reaches 100%, yet the card isn't being used optimally.
I'm new to overclocking, but I've read about it. However, adjusting voltage and clocks isn't something I want to do unless I'm absolutely sure it's safe, just to avoid damaging my PC.
CPU core voltage at idle ranges from 0.711 to 1.000, while the maximum displayed is 1.249, which occurs during stress tests.
In the BIOS I see:
- CPU input voltage: 1.776
- CPU core voltage: 0.997
(Note: yellow text indicates target CPU turbo mode at 4488mhz)
All four cores are synchronized to 44.
I have a general idea of what these values mean, but I'm unsure about the exact correct settings or what's needed to proceed safely with overclocking.
Any advice would be greatly appreciated.
The first step when attempting an overclock is to check how far the CPU can run at its default voltage settings.
Since you're using a 'k' series chip, simply increase the CPU multiplier. Disable turbo and any low-power modes to force the CPU to operate at the set speed.
Try raising the multiplier in small steps, restart after each change. If it remains stable, gradually increase it. On modern motherboards, you might adjust settings directly from Windows. The goal is to find the highest stable frequency. Usually, pushing too far can cause a blue screen on startup, so you should revert to the previous setting.
Increasing the multiplier is generally safe. You could also try boosting core voltage, but I'd avoid that unless necessary—raising core voltage consumes more power and generates excessive heat, which demands strong cooling.
Thanks for the response!
Regarding resetting everything to base settings:
- To return to the original core configuration, would this involve disabling the AI overclock tuner in XMP (to /manual) mode? Also, Ez tuning is enabled, offering power-saving, performance, and standard options.
Concerning multiplier adjustments: Is this the core ratio (44 for all four cores), or something else? I'm looking up the CPU in the BIOS to confirm. It's an Asus Z97 Pro Gamer motherboard.
Edit -
I restored it from Ez Boost, and after rebooting, it now shows:
- CPU turbo frequency: 3900mhz
- DRAM: 1333mhz
- Cache: 3900
- DMI/PEG: 100mhz
These are your default settings. It seems you've already overclocked via the auto tools, which are typically safe.
Core ratio appears to be the multiplier. Raising it should boost speed in steps of 100mhz (for a base of 3900mhz, e.g., 3900 × 39 = 152100). You can test manually; auto tools might have found an optimal setting, but you may get closer to 4.6GHz without changing voltages. Going higher risks overheating and instability.
Regarding performance issues:
- If your games are lagging below 60 FPS, it's not a CPU overclock problem unless you're concerned about frame rate.
- If you notice stuttering with VSync, that's unusual—VSync should lock at 60 FPS without input lag. It might be related to driver settings or GPU limitations.
- The 'ez tuning' tool doesn't allow changing core ratio; I reset it to 43, then increased to 45, but the PC shut down after saving and exiting. It restarted when I applied the tuning, even without a full reboot.
Are you certain about the symptoms? If not, pushing the CPU too hard might not be necessary unless you plan to keep it for an extended period.
Let me know if you need further clarification!
Lukeus699 :
Lukeus699 :
Lukeus699 :
Hey everyone,
I need some assistance if someone is willing to lend a hand.
I own an Intel i5 4690k processor and want to add a bit more headroom for my GPU, which is a GTX 1070. In certain applications it reaches 100%, and the card isn’t being used to its full potential.
I’m new to overclocking but I’ve read about adjusting voltage and clocks. I don’t want to risk damaging my PC unless I’m absolutely sure it’s safe.
The CPU core voltage at idle ranges between 0.711 and 1.000, while the maximum displayed is 1.249, which occurs during stress tests.
In the BIOS I see:
- CPU input voltage: 1.776
- CPU core voltage: 0.997
(with a yellow warning: target CPU turbo mode 4488mhz)
All four cores are synced to 44.
I have an idea about these settings, but I’m unsure what’s correct or safe for proceeding with the overclock.
Any advice would be greatly appreciated.
The first step when overclocking is to check how far you can push your CPU with the default voltage settings.
Since you have a 'k' series chip, simply increase the CPU multiplier. Turn off turbo and any low-power modes to force the CPU to run at the set speed.
Try boosting the multiplier in small steps, restart after each change. If it remains stable, gradually increase it. On modern motherboards, this can often be done via Windows. The goal is to find the highest stable frequency. Usually, pushing too far may cause a blue screen on boot, so you should reduce it back.
Raising the multiplier is generally safe. You might also try increasing the core voltage, but I’d avoid that unless necessary—raising core voltage drains more power and generates excessive heat, which requires strong cooling.
Thanks for the response!
To revert everything to the base core settings, would this involve disabling the AI overclock tuner in XMP or going to manual mode? Also, Ez tuning is active. It gives options like power saving, performance, and standard.
Regarding the multiplier adjustment: I’m sorry if I’m mistaken, but is this the correct CPU core ratio (44 for all four cores) or something different? I’m currently looking it up in the BIOS to confirm.
It appears you already overclocked using the auto tools, which are usually safe.
Increasing the core ratio means the multiplier. This should boost speed in steps of 100 MHz (for a base of 3900 MHz, that’s 100x). Try increasing it gradually and see how far you can go manually. The auto tools might have already found the optimal setting—you may reach around 4.6 GHz without changing voltages. Going higher could require raising core voltage, which is riskier due to heat and power consumption.
As for performance issues in games, if not, I’d likely limit overclocking unless you plan to keep it long-term.
I re-enabled Ez tuning as it restricts the core ratio. It restarted at 43, then I increased it to 45. After saving and exiting, the PC shut down and restarted without a restart. Didn’t see any unusual behavior.
First question: Should the frequency still be around 3500 MHz?
Also, is it typical for the system to completely shut down and then reboot after changing the ratio instead of just reducing fan speeds?
Hwmonitor shows a maximum voltage of 1.274.
Honestly, I’m not very familiar with the 'Ez tuning' feature.
Regarding your symptoms, this doesn’t seem like an issue for CPU overclocking unless your frame rate drops below 60 FPS. If you cap the frame rate, it should push the CPU to its limit—though there’s a third option I’m not sure about. For AMD systems, there’s a driver setting called 'framerate target control' that limits FPS and throttles the GPU accordingly. It doesn’t force waiting times like VSync but reduces load, which can help with stability.
I’m not sure why you’d experience stuttering with VSync, though—it usually causes input lag rather than stutter. If you’re seeing this, it might be a driver or settings issue.
I don’t recall upgrading from an older graphics card before getting the GTX 1070. For the reboot, I changed the core ratio from 43 to 45 and saved/quit; the system restarted instantly with the new setting applied. It didn’t shut down properly, but the overclock was activated afterward.
I’m not sure about the frequency after changes, but it should be stable at around 3500–3900 MHz depending on the settings. If you’re concerned about performance in specific games, we can explore further adjustments safely. Thanks for your help!
I just tested the benchmark on Cpu Z and saw a blue screen twice.
That means your current configuration might be too aggressive. You could lower the speed slightly or increase the vcore a bit.
I checked the guide at the link you mentioned—it’s thorough and includes a speed/voltage chart. They suggest going beyond the 'sweet spot' by pushing from 4.6 to 4.7ghz, but that depends on your CPU model. You might end up getting more than 4400 MHz, though probably not much.
If you still face stuttering in games, try reducing a few settings or consider a g-sync monitor, which should remove tearing caused by VSync.