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ROG Crosshair VI overclocking thread - Page 875

post #8741 of 16755
Quote:
Originally Posted by finalheaven View Post

I clarified that the 2-4 watts difference is from 5% minimum processor and the 90% minimum processor in Ryzen balanced. In other words, if I use balanced profile at 5% instead of Ryzen Balanced, it only works out to be a difference of 2-4 watts at idle. The 2-4 watts is not in reference to the difference between 100% to 90% but from 90% to 5%.

Also, I would find it very odd that AMD released the power plan, and then decided to talk about the P-States knowing that none of the P-States matter if people are using their own power plan. That and how do you explain such a small difference between using 5% minimum processor and 90% with Ryzen balanced if P-States are not working? the 2-4 watts difference between 5% and 90% might be from disabling core parking.

Ah.

Well i know you're going off CPU package power (SMU). I'm looking at CPU core power (SVI2 TFN) and changes from 5% minimum processor state and 90% minimum processor state are more substantial.

I've asked before tho which one of these CPU power readings is the most correct and never got a response frown.gif. I've just chosen to go with the highest aka SVI2 TFN readings, as those on other readings such as voltage are reported the most accurate as well.

And when the Cpu Core power (SVI2 TFN) voltage is considered, there is a 8w drop going from 90% to 59% or less minimum processor state.
Edited by Reikoji - 4/12/17 at 8:21am
post #8742 of 16755
Quote:
Originally Posted by finalheaven View Post

Its strange but Auto appears to be no LLC. Auto is even less than LLC Level 1. Set it to Auto. I believe Elmor confirmed this as well.

I havent had any difference between Bios auto and bios Level 1, and i have no LLC 0 option within the bios setting, just Level 1 to Level 5. Also in DIP 5 the lowest you can set it to is LLC 1 even when you have bios set to Auto. there is no LLC 0 option.
post #8743 of 16755
Quote:
Originally Posted by Reikoji View Post



And since there is still some level of overshoot measureable with advanced equipment, one would have to wonder if the overshoot of 1.5v LLC1 after load would be greater/equalto/less than the overshoot of 1.45v LLC3

I wouldn't think about that too much. The current change isn't significant enough to warrant a huge change at these voltages and currents. Plus, some overshoot is allowed by specification. It's the peak magnitude and duration limits that one has to adhere to.
post #8744 of 16755
Quote:
Originally Posted by Reikoji View Post

I havent had any difference between Bios auto and bios Level 1, and i have no LLC 0 option within the bios setting, just Level 1 to Level 5. Also in DIP 5 the lowest you can set it to is LLC 1 even when you have bios set to Auto. there is no LLC 0 option.

He's correct though, i think it was either elmor or stilt that said llc auto is 0% so you get no LLC, and that would make sense under hwinfo64 cpu core i drop from 1.256 in idle to 1.199 under realbench. So theres def no llc going on here.
    
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post #8745 of 16755
Quote:
Originally Posted by bluej511 View Post

He's correct though, i think it was either elmor or stilt that said llc auto is 0% so you get no LLC, and that would make sense under hwinfo64 cpu core i drop from 1.256 in idle to 1.199 under realbench. So theres def no llc going on here.

I missed that whole speal on LLC levels before. But, wouldn't this make bios LLC level 1 0% as well then?
post #8746 of 16755
I think LLC 1 is 25% or maybe even 10% and LLC 5 is 100%, elmor or stilt posted a chart before but no idea which page thats on, im sure Gup knows or has it on his ryzen page.
    
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post #8747 of 16755
Quote:
Originally Posted by Raja@ASUS View Post

Quote:
Originally Posted by Johan45 View Post

From my observations this platform seems to like a bit of variation in voltage just because of the way it's made the variation in voltage helps balance the cores.

This sounds as if you're confusing overshoot with power saving related VID changes. These are two different topics.

Quote:
Originally Posted by Johan45 View Post

From my experience if you set a hard voltage of 1.35v to cover the peaks, the CPU is actually overvolting most of the time and will run hotter. If the CPU can run 70 % of the time at 1.31 volts and needs the occasional 1.35v why force it to take that voltage 100% of the time even though it's not necessary?

With LLC properly set to supply a voltage that sags to 1.35V under load, you're not asking the VRM to ramp VID when it is faced with the load transient. You are also guaranteed the voltage is at the required level when the current demands increase. From an ideal point of view, the issue with ramping the voltage to the required value for stability is that it has to meet the slew rate demands of the load. In other words, it is considered more intelligent to work with the constraints of the circuit (by using the droop mechanism) than against it. On top of that, very little current flows when the CPU is in idle state.

My whole point was there's really no need I have found to take LLC off of auto as it's working fine most new platforms are set up very well. Setting the voltage to 1.35v on auto will sag to 1.31v but will also supply the 1.33 etc.. when it's needed. This isn't like an x38 formula that sags to 1.2v even though you have set 1.35 in BIOS.
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post #8748 of 16755
Quote:
Originally Posted by madweazl View Post

To this point, at what load does the LLC get applied?

The slightest load is enough to cause a ramp. You'd have some serious issues if it didn't, as the slew rate of the circuit has to be faster than the load execution of the processor. Otherwise, BSOD is your daddy.
post #8749 of 16755
Quote:
Originally Posted by bluej511 View Post

I think LLC 1 is 25% or maybe even 10% and LLC 5 is 100%, elmor or stilt posted a chart before but no idea which page thats on, im sure Gup knows or has it on his ryzen page.

Hmmm perhaps the difference between LLC 0 and LLC 1 is another one of those things not measurable without advanced equipment
post #8750 of 16755
Quote:
Originally Posted by Johan45 View Post

My whole point was there's really no need I have found to take LLC off of auto as it's working fine most new platforms are set up very well. Setting the voltage to 1.35v on auto will sag to 1.31v but will also supply the 1.33 etc.. when it's needed. This isn't like an x38 formula that sags to 1.2v even though you have set 1.35 in BIOS.

Yes, but if that were your whole point, you wouldn't have used the 1.31 to 1.35V example. wink.gif
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