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Asus adaptive core voltage

post #1 of 9
Thread Starter 
I am having decent luck with my delidded 4770K overclock to 4.6ghz with a manual core voltage of 1.2. Temps top out at 75 degrees during the more stressful prime95 portions, on the easy tests it does 60-65.

I tried out adaptive voltage with an offset of +.2 and the temperatures are higher during prime95. I picked the offset based on the displayed voltage of 1.0. I know adaptive voltage is known to deliver extra voltage compared to a manual setting, but I wanted to make sure I am doing the right thing picking an offset of .2 with the goal of matching the manual 1.2 setting.

Are the core voltage offsets relative to a default voltage like 1.0? I RTFMed but was not illuminated.

I also couldn't get Linux to boot setting the offset for just turbo mode, it had to be the regular core voltage.
Edited by aweisberg - 6/7/13 at 10:40am
post #2 of 9
I've had the same issue, I cant seem to find in the RTFM process an explination as to what the base voltage is. I'm stable on 1.25v manual myself but I cant seem to get stable with the adaptive settings, im afraid to tweak them without clarification a huge voltage spike under Aida64....
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post #3 of 9
I don't fully understand the adaptive mode, but I've had luck with the following:
I was stable at 1.25V manual mode as well. Under adaptive mode, I changed the offset mode sign to "-" and core voltage offset to Auto.
Do not benchmark under adaptive mode though, you will get a voltage spike ~1.35V.
post #4 of 9
Quote:
Originally Posted by Social Assassin View Post

I don't fully understand the adaptive mode, but I've had luck with the following:
I was stable at 1.25V manual mode as well. Under adaptive mode, I changed the offset mode sign to "-" and core voltage offset to Auto.
Do not benchmark under adaptive mode though, you will get a voltage spike ~1.35V.

That sounds a little scary mate..... Offset mode to minus? isnt that for underclocking?
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post #5 of 9
No, using AVX instruction programs while on Adaptive mode overvolts by 0,05V automatically, these are not voltage spikes. The CPU just requests more power running these applications.
post #6 of 9
Quote:
Originally Posted by ratchet285 View Post

No, using AVX instruction programs while on Adaptive mode overvolts by 0,05V automatically, these are not voltage spikes. The CPU just requests more power running these applications.

ok.. I get it.. That said, how do I calculate what the adaptive voltage ceiling is?

The reason I ask, is when I type 1.25v into the BIOS under "additional voltage for CPU turbo", it flashes it BRIGHT RED which is the asus warning for WAY TOO HIGH... but 1.25v in manual is just yellow for "ok with adequate cooling"....
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post #7 of 9
Quote:
Originally Posted by slash621 View Post

ok.. I get it.. That said, how do I calculate what the adaptive voltage ceiling is?

The reason I ask, is when I type 1.25v into the BIOS under "additional voltage for CPU turbo", it flashes it BRIGHT RED which is the asus warning for WAY TOO HIGH... but 1.25v in manual is just yellow for "ok with adequate cooling"....

might be different bios versions.
I set it on my z87-a board its yellow at 1.22v
I use latest bios.
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post #8 of 9
Quote:
Originally Posted by slash621 View Post


ok.. I get it.. That said, how do I calculate what the adaptive voltage ceiling is?

The reason I ask, is when I type 1.25v into the BIOS under "additional voltage for CPU turbo", it flashes it BRIGHT RED which is the asus warning for WAY TOO HIGH... but 1.25v in manual is just yellow for "ok with adequate cooling"....

 

Additional voltage for CPU turbo is just that "additional" voltage. So that is added to what the chip is already requesting. Offset is just adding whatever voltage you specify (the offset) to the voltage the chip is requesting (the VID). So you need to run your chip under load to find the VID, and then set the offset to make up the difference to what you need, and not calculate the offset from a base voltage like 1.0V (the VID changes by frequency, and now, by load). The best way to do it is to set a small positive offset, like +0.01V) and then see what voltage that delivers under the load you want to test. So if you need 1.25V in Prime95 and +0.01V offset gives you 1.21V, then just change the offset to +0.05V instead. You just need to be careful with offset and Haswell because under certain loads (like AVX loads) the VID will spike and cause really high voltages. For that reason, until more information is available (and new BIOSes come out) I would recommend just sticking with a manual voltage.
post #9 of 9
Yeah... for the moment I've actually gone back to stock settings.... It's still double the performance of my phenom II 945 and coupled with the change from a 460GTX 1GB to a 770GTX 2GB I'm SUPER PUMPED with my gaming performance already.

By the time I really "need" to OC for future games (like Star Citizen) the guides will be fairly well established...
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