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How efficient does Asus M5A88-V EVO handle voltage spikes from CPU LLC?

post #1 of 10
7/17/12 at 4:07am
Thread Starter 
I don't have an oscillope to test this so any knowledable asnwer from experience would suffice. a tested formula to calculate overshoot perhaps?

i mean even if it weren't possible for spikes to occur from LLC, if there was woudl my mobo be up for the task to prevent damage to the CPU?

Do you think the mobo cna handle the possible spikes as a result of CPU LLC to keep it under the maximum safe voltage of 1.55V, or posibbly even 1.50V or 1.475?

Say for isntance with LLC enabled, the Load Vcore = 1.43V -1.45V.

At this point i'm not so much concerned about 24/7 OC stability issues as I am about possible CPU damage due to spikes or relatively signficant decrease in life span.
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post #2 of 10
7/17/12 at 2:07pm
A quick experiment with cenibench 11.5 and cpu z and core temp would answer that, approximatey .35 - .5v increase under load is expected. Heat is more of an issuee than voltage. Keep it under 55C in core temp on your amd because temp sensor is skewed on phenom 2. Do you have push pull fans going on your cooler?
Edited by Remnant88888888 - 7/17/12 at 6:26pm
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post #3 of 10
7/17/12 at 3:25pm
Dont go over 1.55v core with air cooling and 1.6125v on a full custom water loop
Edited by Remnant88888888 - 7/17/12 at 6:24pm
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post #4 of 10
7/17/12 at 6:34pm
Thread Starter 
Quote:
Originally Posted by Remnant88888888 View Post

A quick experiment with cenibench 11.5 and cpu z and core temp would answer that, approximatey .35 - .5v increase under load is expected. Heat is more of an issuee than voltage. Keep it under 55C in core temp on your amd because temp sensor is skewed on phenom 2. Do you have push pull fans going on your cooler?
don't you mean . 03 - .05V?

as for temps, don' you mean under 55C CPU temp? my core temps are borked but i know from a stock locked CPU Load temps were 12-15C degrees higher than core Load temps.

i have push pull fans why?
Quote:
Originally Posted by Remnant88888888 View Post

Dont go over 1.55v core with air cooling and 1.6125v on a full custom water loop
good to know if i ever go that extreme thumb.gif
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post #5 of 10
7/17/12 at 7:26pm
cpu load line calibration set at extreme or level five will put you at an extra .35v up to .5v depending on the board, ive never used your board but .5v is what mine does.
yes i mean 65C under load temperature on load, but i use Core temp program to monitor my temps realtime, and with the temperature sensor being skewed by showing 10degrees less than actual physical temperature, you should not let your temperature get over 55C wile viewing temperature in core temp.
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post #6 of 10
7/17/12 at 7:33pm
  • Schmuckley
  • No keyboard detected! Press F1 to continue..
880 chipset bites..It's mid-grade @ best..890fx or gx or 990fx..only
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post #7 of 10
7/17/12 at 9:22pm
Thread Starter 
Quote:
Originally Posted by Remnant88888888 View Post

cpu load line calibration set at extreme or level five will put you at an extra .35v up to .5v depending on the board, ive never used your board but .5v is what mine does..
taht doesn't doesn't make sense at all man

u sure you're not tallking about the load volts? im' talking about about spikes that occur after load volts are pumped.

my system has three LLC options: Auto, Enbled, Disabled.

Auto = DIsabled at least afaict
Enabled = .11V extra volts pumped when the CPU begins loads which probably means the LLC levels is equivalent to level 1 or level 2 (?).

.say i set 1.34V in bios, windows idle is 1.37 and load volts jump to 1.45 by .11V. this is not what i'm talking about when i say spike.

spike is when the volts go beyond the 1.45V load right before it goes back down to 1.37V idle...

Quote:
Originally Posted by Remnant88888888 View Post

yes i mean 65C under load temperature on load, but i use Core temp program to monitor my temps realtime, and with the temperature sensor being skewed by showing 10degrees less than actual physical temperature, you should not let your temperature get over 55C wile viewing temperature in core temp.
core temp doesn't work for me i use hwmonitor or aida 64 they report the same temps but i'm seeing actual physical temperature as opposed to the core tempperature reported by the skewed temp sensors so in my case I'ma ble to monitor the actual physical temperature and believe I should not over 65C but to be safe i try to stay under 60C...

FYI i know this because the CPU load temp were roughly the same with 4 cores vs 6 cores.
Quote:
Originally Posted by Schmuckley View Post

880 chipset bites..It's mid-grade @ best..890fx or gx or 990fx..only
can you explain? saying "your board bites get a better one" leaves much to the imagination....
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post #8 of 10
7/18/12 at 2:17pm
Leave it at auto on your board. With an enthusiast class board you have the option to choose what level of calibration you want across your chip, level 5 churns out an extra .35v - .5v on core by increasing amperage with processor loading
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post #9 of 10
7/18/12 at 2:19pm
Leave it at auto on your board. With an enthusiast class board you have the option to choose what level of calibration you want across your chip, level 5 churns out an extra .35v - .5v on core by increasing amperage with processor loading.

I dont know how big of a spike your talking about, ive never owned your board
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post #10 of 10
7/22/12 at 7:47am
Thread Starter 
I put it no auto and it was unstable. so i put it back on enabled.

and i don't think there is a (level 5).3+ V spike on my board thankfully.
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