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post #8751 of 16781
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.

I havent seen any evidence of a dynamic LLC.

Edit: this likely caused by deltas in the load placed on the CPU.
Quote:
Originally Posted by Raja@ASUS View Post

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.

LOL, thanks thumb.gif
Edited by madweazl - 4/12/17 at 8:42am
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post #8752 of 16781
Quote:
Originally Posted by Raja@ASUS View Post

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
I guess I should have said with a BIOS setting of 1.35v, that's what I see running this platform. Only time it overshoots is at idle.
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post #8753 of 16781
Quote:
Originally Posted by madweazl View Post

I havent seen any evidence of a dynamic LLC.
LOL, thanks thumb.gif

Yea, i'm pretty sure if you leave LLC on auto, its not going to variate between the levels of LLC depending on anything, its just going to stay at LLC 0, or 1, whichever.
post #8754 of 16781
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.

Quote:
Originally Posted by Reikoji View Post

I missed that whole speal on LLC levels before. But, wouldn't this make bios LLC level 1 0% as well then?

This thread OP, section LLC settings on C6H has the "speal" wink.gif .

Just about to add raja@asus images/posts wink.gif .
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post #8755 of 16781
Quote:
Originally Posted by gupsterg View Post

This thread OP, section LLC settings on C6H has the "speal" wink.gif .

Just about to add raja@asus images/posts wink.gif .

naruhodo. well, they should think about changing Auto to Level 0 in bios! However Auto/LLC 0 is still awkwardly enough not an option in DIP5's Digi+ power control. Maybe in future update.
post #8756 of 16781
So what I did was I went back into bios and set CPU LLC back to Auto. Back to realbench stress and under load it is still the same 1.287v from 1.356 I get when I set LLC 1...
post #8757 of 16781
Quote:
Originally Posted by Blumondae View Post

Major improvement from 1002 to 0083 here with my G.Skill F4-3200C16D-16GTZR (Trident Z RGB) with Hynix IC:

I can now reach 3200 at rated timings (16-18-18-38) out of the box on my 1700 @3.95. On 1002 max ram speed was 2400 (@ 12-14-14-30)!

A few notes:
- 1.4V Ram voltage required (1.35 boots but memory errors in stress tests, no system crash though)
- 3300MHz (3200 multi + 104 bclk) does not work. Anything above 3200 does not actually work with bclk oc
- ROG leds are always on when computer off, even with the "off" option in bios (also on 1002)
- Default (auto) SOC voltage
- Slightly less cpu voltage needed 1.3825 (LLC3) -> 1.3750 (LLC3) @ 3.95
- Faster boot time
- Easy recovery when RAM cannot boot (on 1002 it was a nightmare)

Also thank god for the tool able to remove the +5°C offset from Tctl!! This was really annoying, and will allow me to clock my 1700 @ 4GHz without having my fans reach 100% since Tctl stays below 75°C (but SIO didn't).

I have the same kit as you and that's great news!

Have you ran any powerful stress tests with these speeds? I'm able to boot into windows when I mess with some settings but as soon as I start any sort of benchmark the system black screens.. Also, are you using the docp profile or a multiplier to achieve those speeds?
post #8758 of 16781
Quote:
Originally Posted by Raja@ASUS View Post

...
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.

Quote:
Originally Posted by Raja@ASUS View Post

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.
[bolding added by kaseki]

Slew rate is a new topic just brought to light, but in hindsight a fundamental characteristic to be expected. The first quote suggests that there is a risk with the present LLC of increasing computation load faster than the LLC slew rate and hence having a period of potential instability (if LLC were used to achieve stability). This risk is reinforced by the next to last sentence of the first quote. The second quote implies to me that the LLC always achieves sufficient slew rate. So where are we in probability of insufficient slew?
Edited by kaseki - 4/12/17 at 9:02am
     
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post #8759 of 16781
Quote:
Originally Posted by Atingleee View Post

I have the same kit as you and that's great news!

Have you ran any powerful stress tests with these speeds? I'm able to boot into windows when I mess with some settings but as soon as I start any sort of benchmark the system black screens.. Also, are you using the docp profile or a multiplier to achieve those speeds?

Well it depends what you consider as powerful stress test. I have done a few minutes of:

- Prime95 blend test
- 10 Cinebench R15 runs
- Aida64 Memory stability test with and without cpu stress test
- 2 hours of gaming on mass effect andromeda

Prime95 and Aida64 have been running for 15-30min since I am not comfortable putting such loads for long periods, so it might not be stable as some people here define it. But no errors what so ever for me.

No DOCP, only ram multiplier. Note though that I need 1.4V in my sticks otherwise Prime95 blend crashes the system and Aida64 gives me errors.
post #8760 of 16781
Quote:
Originally Posted by kaseki View Post


[bolding added by kaseki]

Slew rate is a new topic just brought to light, but in hindsight a fundamental characteristic to be expected. The first quote suggests that there is a risk with the present LLC of increasing computation load faster than the LLC slew rate and hence having a period of potential instability (if LLC were used to achieve stability). This risk is reinforced by the next to last sentence of the first quote. The second quote implies to me that the LLC always achieves sufficient slew rate. So where are we in probability of insufficient slew?

The only way you know is if you BSOD or not.

And I should add that the condition is likely worse when power savings have been removed. In such cases, there are no hold times before execution of the workload.
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