Discussion around CPU VCORE versus VID voltage issues
Discussion around CPU VCORE versus VID voltage issues
Im fairly new to the overclock scene. Ive done a few stress tests/messed with voltage/multiplier, and now curently stress testing my system using RealBench 2.44 with a CPU core Voltage override of 1.35v and a 47 multiplier. While watching settings in HWMonitor i observed my CPU VCORE which is listed under my motherboard at 1.408V, while under my processor it says MAX VID is 1.319V. I was under the impression that VID was the volts going to my processsor, do have this wrong? If so why is it going above the CPU Core Voltage override and how would i set a max voltage? Any light that can be shead on this will greatly help me out, im trying to soak up all the information i can. Heres an included Gyazo of my HWMonitor/CPUZ.
https://gyazo.com/7a655bb293b9b9b5998f2ee8d1f0a319
Thankyou in advance to anyone that takes the time to reply to this thread.
This is where the process becomes more intricate. I’ll try to keep the explanation straightforward.
The BIOS performs three main tasks while overclocking settings are in place:
1. Verify CPU core and onboard MOSFET temperatures are within limits
2. Ensure the CPU reaches its desired clock speed
3. Confirm the CPU operates at its intended voltage
I arranged these in order of importance, from highest to lowest. The BIOS will modify the CPU clock speed depending on temperature. If it exceeds 90°C, it reduces the speed. Similarly, if the MOSFETs on the motherboard become too hot, the BIOS will also adjust accordingly.
Next, I moved on to the second priority point. The BIOS considers maintaining a steady clock speed more...
Hello camf2xu, it seems you're confusing the terms. VID is the voltage the chip operates at when unmodified, while VCore refers to the current voltage applied through the CPU.
weberdarren97 :
Hello camf2xu, you're mixing up a few concepts. VID is the voltage the chip operates at when it's out of the box, without overclocking. VCore refers to the current voltage being applied through the CPU. Thanks for your message.
Regarding adjusting the maximum voltage you want to apply, you're currently setting CPU Core/Cash Voltage to manual and the Override to 1.35.
Also, if your voltage is around 1.408, it's not a safe 75ºC maximum temperature during a stress test—though it might be acceptable for that voltage level. You may want to reassess the limits.
Thanks to Intel Skylake design, these chips perform excellently at low voltages. I believe you don't require more than 1.35V for overclocking. Also, increasing voltage puts extra stress on the MOSFETs in the motherboard. If you push too high, you'll end up with 12V reaching the CPU, which will likely destroy the chip.
Max VID isn't the maximum voltage permitted for the CPU. This limit is set by the MOSFETs on the motherboard. Max VID represents the upper voltage threshold before overclocking is triggered. If your processor ever exceeds this value under default BIOS configurations and without any software overclocking, the BIOS will halt the boot and indicate a CPU error.
The ability to surpass Max VID occurs when overclocking has been enabled.
weberdarren97 :
Thanks to the Intel Skylake architecture, these chips perform well even at low voltages. I believe you only need around 1.35V for overclocking. Moreover, increasing the voltage puts extra stress on the MOSFETs in the motherboard. If you blow those out, you'll get 12V straight to the CPU, which could damage the chip.
What method are you using for overclocking? Are you running a program in Windows or relying on the BIOS?
I'm still puzzled. I don't understand why my manually set CPU core voltage override in the BIOS at 1.35V results in a Vcore reading of 1.408V, as shown by HWMonitor and CPUZ sdays Core voltage at 1.408V (refer to the gyazo from your first post). I'm also using BIOS on an ASUS Maximus Hero VIII.
This is where the process becomes more intricate. I’ll try to keep the explanation straightforward.
There are three key actions the BIOS performs when overclock settings are applied.
First, it verifies that the CPU core and onboard MOSFET temperatures are within limits.
Second, it ensures the CPU reaches its desired clock speed.
Third, it confirms the CPU operates at the intended voltage.
I arranged these in order of importance, from highest to lowest. The BIOS will modify the CPU clock speed according to temperature changes. If temperatures rise above 90°C, it reduces the speed. Similarly, if the MOSFETs become too hot, adjustments are made.
The second priority is maintaining a steady clock speed rather than strictly matching the target voltage. If the voltage you set isn’t enough to keep the clock stable, the BIOS will automatically tweak the core voltage to prevent instability.
Lastly, it evaluates whether bringing the voltage closer to your target would risk unsafe temperatures or cause clock instability. If so, it will stick with the current voltage and disregard the target setting.
This happens thousands of times each second.
When I say "target," I mean the exact setting, but the system recognizes that it’s not always achievable and will adjust accordingly.
This is where the process becomes more intricate. I aim to present it in the simplest way possible.
There are three key actions the BIOS performs when overclocking settings are applied.
1. Verify CPU core and onboard MOSFET temperatures are within limits
2. Confirm the CPU reaches its desired clock speed
3. Ensure the CPU operates at its intended voltage
I arranged these in order of priority, from highest to lowest. The BIOS will modify the CPU clock speed according to temperature. If it exceeds 90°C, it will reduce the speed. Similarly, if the MOSFETs on the motherboard become too hot, adjustments are made.
Next, I focused on the second priority. The BIOS prioritizes maintaining a steady clock speed over strictly matching the target voltage. If the voltage setting isn’t sufficient to keep the clock stable, it will automatically adjust the CPU core voltage to prevent instability. It then evaluates whether bringing the voltage closer to the target will cause unsafe temperatures or unstable clock speeds. If so, it will maintain the current voltage and disregard the target setting. This process happens thousands of times each second.
Understanding "target" here means aiming for the exact setting, but the system makes necessary adjustments if it can’t achieve it without risking overheating or instability.
That clarifies things. I thought manual mode would prevent exceeding the voltage and cause a blue screen if the CPU didn’t receive enough power, which would signal me to increase it. With variable mode, it can fine-tune the voltage slightly.
After completing my stress test, my CPU Vcore reads 1.36, and the listed Core Voltage in CPUZ matches. Since I enabled the Core voltage override in BIOS, am I establishing a base voltage for the CPU?
For your reference:
https://gyazo.com/a4c994c923d5dec150631e671dd55d65
Would lowering the CPU Core Voltage Override and checking if the system boots to OS be my next step?
I thought setting it manually would keep the voltage within the limits I wanted and avoid a blue screen if the CPU wasn't receiving enough power. That would indicate that increasing the voltage was necessary. When it comes to variable settings, it allows the system to fine-tune the voltage independently. This approach differs from traditional BIOS behavior.
You're not defining a fixed base voltage; it can fluctuate if needed. Your instructions are guiding the system to reach your desired voltage, but it will adapt accordingly. In certain scenarios, even if you specify a target voltage, the system may disregard it entirely. This flexibility contributed to achieving the world record for CPU overclocking on an Asus board. These boards are capable of making adjustments to the core clock during operation.
Remember, setting world records requires dedicated effort. This explanation covers other points before focusing on the topic at hand.