Maximum Hero X core voltages are insane?!!?

[SpinCykle]

Main changes I know of were the SVID/LLC rules being changed. The training stuff is for advanced tweaking only, and not something the average Joe needs to concern themselves with.

Can we flash back to 0505? I’m having problems finding the sweet spot for LLC now that it was changed. I’m running all manual volts. MCE disabled and XMP enable. Previously my 8700k ran 5000Mhz at 1.28v with LLC6 and it never drooped. Voltage was always a constant 1.28v and she was stable as can be. Now with same LLC and voltage I’m getting vdroop to 1.264v and it’s causing instability in real bench benchmark but I’m stable in realbench stress testing. *I still need to do some gaming to test.

If I set the voltage to 1.285v and LLC6 I’m overvolting to 1.296v now. And if I set 1.29v with LLC5, I vdroop all the way to 1.248v at times. *1.28v with LLC7 overvolts to 1.296 too. 1.275v with LLC7 gives a range of 1.264 to 1.296 depending on load. This is frustrating. I know my chip does not need 1.296v to be stable. Any suggestions?

[Raja@ASUS]

Increase the VID to get the target load voltage your CPU needs. Even though, you thought you were seeing no droop and overshoot on the previous build, it was there - you just need a scope to see it.

[SpinCykle]

Increase the VID to get the target load voltage your CPU needs. Even though, you thought you were seeing no droop and overshoot on the previous build, it was there - you just need a scope to see it.

Hi Raja,


Thank you for the quick response. By stating I should "increase the VID to get the target load" , are you stating I should just increase the CPU voltage from 1.28v to 1.285v, while keeping my previous LLC of 6 and accept the displayed software reading voltage in windows reads overvolting (1.296v) at certain times of load/idle ? Or is there another setting I'm missing that needs to be adjusted?

Overall, it does not surprise me the droop was there. I just preferred knowing my chip was stable at 1.28v w/ no vdroop at LLC6.

[Raja@ASUS]

A few things:

1) Yes, adjust VID to get voltage your CPU needs under load. There is no issue with that.

2) There is no such thing as no droop. It's actually better if the droop is set to compliment the VRM. If the LLC is too aggressive, it results in more overshoot (which is far worse than Vdroop).

[SpinCykle]

A few things:

1) Yes adjust VID to get voltage your CPU needs under load. There is no issue with that.

2) There is no such thing as no droop. It's actually better if the droop is set to compliment the VRM.

Great, thank you. Here's my settings so far! Does anything look off to you?

CPU: 8700k - Memory: F4-3600C16D-16GTZR

Custom Watercooling loop (480 Rad + 360 Rad) w/ EK Monoblock + single GTX 1070

XMP Profile Selected

MCE Disabled

AVX 0

Sync all cores 50

CPU SVID Support Disabled

LLC Level 6

Internal CPU power management - Long & Short Duration Power Package - 4095

CPU Core/Cache Current Limit Max 255.50

Min & max cpu cache ratio 47

BCLK Aware Adaptive Voltage - Dissabled

CPU Core/Cache Voltage - 1.285

DRAM 1.35V - VCCIO 0.95v - VCCSA 1.05v

With the bumped VID the system runs very well! I just have to accept my chip takes 1.296v to be stable.....

[Raja@ASUS]

The actual load voltage required to keep your CPU stable will be the same between both builds. The set VID is not the load voltage.

[SpinCykle]

The actual load voltage required to keep your CPU stable will be the same between both builds. The set VID is not the load voltage.

Okay. I think I understand what you are saying. However, I need to read some more in depth material on CPU VID and its correlation to CPU Core Voltage. My understanding is, the CPU VID is a base voltage number set by Intel which changes based on the "need" of the CPU during different states of Load. For example, the VID can be anywhere from 1.25v to 1.35v depending on what the CPU is asking for in it's current load/state. The VID value has nothing to do with the actual load voltage or CPU Core voltage that the processor is receiving. Example, Bios settings 1.285v LLC 6 = software reading @ 100% load of 1.28v with a VID of 1.35v

In your previous comments, you say to adjust the VID to achieve the desired load voltage, to achieve stability. If my understanding is true from above, how can I affect the VID value? Wouldn't I just increase CPU core voltage to in turn adjust the minimum load voltage required for stability. And than accept the variances of overshoot/undershoot (vdroop) software readings being displayed. How would you actually adjust VID?

Sorry if I'm missing something blatantly obvious. And thank you very much for your help!

[Raja@ASUS]

Vid is what you set in bios. In adaptive mode, the vid you set in bios is the vid that's applied when the cpu goes into full load state (the requested vid is affected by the ia ac and dc load lines). In manual mode, the vid you apply in bios is the always applied, regardless of the load. The llc affects the gap between vid and the actual voltage, but the trade off is overshoot. The overshoot cannot be seen without an oscilloscope.


With the llc slope changing between builds, you may need a higher Vid, but ultimately the voltage the cpu needs to be stable is still the same. You just increase the vid to get that voltage.

[SpinCykle]

Vid is what you set in bios. In adaptive mode, the vid you set in bios is the vid that's applied when the cpu goes into full load state (the requested vid is affected by the ia ac and dc load lines). In manual mode, the vid you apply in bios is the always applied, regardless of the load. The llc affects the gap between vid and the actual voltage, but the trade off is overshoot. The overshoot cannot be seen without an oscilloscope.


With the llc slope changing between builds, you may need a higher Vid, but ultimately the voltage the cpu needs to be stable is still the same. You just increase the vid to get that voltage.

Thank you for the quick explanation!

[marcopai]

Guys where can i set the VID? im pretty confused lol