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4770K adaptive voltage 1.3V - Page 2

post #11 of 25
Thread Starter 
Quote:
Originally Posted by Cyro999 View Post

Enable c6/c7 and other c-states as well as EIST etc. Use balanced power plan in windows, not high performance. It'll drop to ~0.7v or less idle, you need the right sensor to see it. I'd also suggest reading the Haswell overclocking thread with statistics here on OCN and using x264 test there

I'm a bit confused because many guides are suggesting adaptive voltage, but i'm here to learn more from experienced ppl (I was convinced that keeping a manual Vcore prevent the voltage drop)

c states are actually on auto.
I will enable all c states (i think that balanced power is already active).

I'll come back asap
post #12 of 25
From this guide http://www.overclock.net/t/1411077/haswell-overclocking-thread-with-statistics: (honestly these guys here have more expreience than anyone on this platform, I am subbed and check in sometimes and they go through alot of these processors, Cryo is on his 4th or 5th if I recall correctly

Io/Sa Voltages
Also, you may need to alter the voltages for SA, IO Analog, IO digital as well. Try adding 0.1v to them.Please note: It is unclear at this point what voltages are dangerous. Be careful with these voltages. JJ from Asus said these voltages help stabilize a higher Dram divider but I got 9c errors at as low as 1600 DDR3 while managing a stable 2133 OC without touching these.

CPU VID vs Vcore
There is a difference between CPU VID and CPU Vcore when I mention both of them together. I repeat: Only when I am talking about VID and Vcore in the same sentence does my definition of Vcore change.

Normally when I say Vcore I mean what you think I mean. But when I mention VID vs Vcore, VID is the amount of core voltage you set in the BIOS yourself. You should know it, you're the one that set the voltage in there. The Vcore is the number measured by Hwinfo or HWmonitor on your CPU when it is under max load.

What does this mean? Your Vcore could be above your VID. If you set 1.3v in the BIOS that's 1.3v VID. If you are also under adaptive voltage and you're running Prime95, your Vcore could be a whopping 1.5v, way above your set 1.3v.

Finally please note, there are multiple reports of people having a higher Vcore than VID even under non-synthetic loads but the extra voltage is relatively small. Just be careful and monitor voltages closely. As your VID increases the extra voltage drawn in from a regular non-synthetic load increases.

Override vs Adaptive: An analysis

My tests show that adaptive is a USELESS voltage mode.

Adaptive On Cstates Off showed the same idle voltage as Adaptive off (Override) Cstates off.

Adaptive Off Cstates On showed very low idle voltage.
Adaptive On Cstates On showed identical results to Adaptive Off Cstates On.

Having Adaptive On means your voltage increases by a large amount during a synthetic stress test. Because adaptive doesn't seem to do anything and of this possible safety hazard, I now recommend people to turn Adaptive OFF and Cstates ON to C7.



In all three cases, the idle clock speed of the processor did not change as measured by HWinfo. For this I also doublechecked with CPUZ and it agreed with HWinfo.
post #13 of 25
Quote:
Cryo is on his 4th or 5th if I recall correctly

Nah, that's someone else. I've been around reading everything since i got my CPU on launch week. Really, after having seen a dozen or two guides - this is the only one you should be looking at. It's more of a community thread with a bunch of info in the OP that is regularly updated than it is a guide. It's OCN's best and OCN is among the best of sites
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post #14 of 25
Thread Starter 
Ok, thank you, now my rig is running with fixed vcore, all C-states enabled. Finally Vcore drops at idle. No more adaptive voltage.
Just another question: what are the suggested cache voltage settings ? Manual @ ?V or auto..
post #15 of 25
Thread Starter 
Quote:
Originally Posted by bonomork View Post

Ok, thank you, now my rig is running with fixed vcore, all C-states enabled. Finally Vcore drops at idle. No more adaptive voltage.
Just another question: what are the suggested cache voltage settings ? Manual @ ?V or auto..

what do you suggest for stability test ?
post #16 of 25
Quote:
Originally Posted by bonomork View Post

what do you suggest for stability test ?

Prime95 blend, custom with as much ram as possible
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post #17 of 25
For Haswell, x264 (it's talked about some in the overclocking thread)
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post #18 of 25
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Quote:
Originally Posted by Cyro999 View Post

For Haswell, x264 (it's talked about some in the overclocking thread)

yep, according to the guide I have already downloaded it. Tonight testing time thumb.gif
Thank you.
post #19 of 25
Thread Starter 
Quote:
Originally Posted by bonomork View Post

yep, according to the guide I have already downloaded it. Tonight testing time thumb.gif
Thank you.

Can i replace x264 with realbench ?
post #20 of 25
Realbench is just an old version of x264 encoder plus some other stuff, so it's better and worse at the same time
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