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Can't get stable with power savings on

post #1 of 12
Thread Starter 
Hi guys i'm almost completely done overclocking my system, the problem is i have it rock solid at 4.5ghz using these settings:

vcore at +0.005 offset
every other voltage normal
pll overvoltage disabled (so i can use sleep, doesn't make a different anyway)
LLC high

idle volts in cpu-z are reported as 1.360v
full load volts are between 1.336v and 1.344v

passes 50 IBT, temps reach 72*C max (this is the "old" libraries)
games run fine for hours on end,


now as soon as i enable all the energy savings, the processor is rock solid in IBT still for 50+ passes, it's when i play games thats the problem,

i can play flight simulator X for literally 2-3 minutes before the system hardlocks without a bsod and forces me to press the reset button, yet with the energy savings on i can play for at least an hour (is what i've tried),

i assume its the fluctuating voltages, how can i fix that?

thanks


edit: turning LLC off seems to improve things, but i have to use a larger offset, 0.025 stables things up against the old 0.005, i've just noticed there's a "max voltage to apply during turbo boost" setting in BIOS, does this mean that instead of LLC, i can use this to give more voltage to the chip whilst it's under load? this means i could lower the offset to make idle vcore about 1.32v, then give turbo boost like 0.1 extra to account for vdroop, would this work with power savings?
Edited by Roksonixx - 7/23/11 at 7:30am
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post #2 of 12
What cooling do you have? Are you using the latest AVX IBT with updated linkpacks? If not then you may not be stable, you can get HERE or alternativly run prime blend for a few hours.

By the way I would increase the LLC to Ultra High (75%) is it more than likely might fix your problem. Try enabling spread Spectrum, it actually helps to stabalize the voltage a little. As you are using offset voltage, make sure C3 and C6 report are disabled in the BIOS , you can leave C1E and EIST on, it doesn't effect the overclock.

Hope that helps.
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post #3 of 12
Thread Starter 
Quote:
Originally Posted by munaim1 View Post
What cooling do you have? Are you using the latest AVX IBT with updated linkpacks? If not then you may not be stable, you can get HERE or alternativly run prime blend for a few hours.

By the way I would increase the LLC to Ultra High (75%) is it more than likely might fix your problem. Try enabling spread Spectrum, it actually helps to stabalize the voltage a little. As you are using offset voltage, make sure C3 and C6 report are disabled in the BIOS , you can leave C1E and EIST on, it doesn't effect the overclock.

Hope that helps.
i heard offset and LLC shouldn't be used together, so i disabled LLC, upped the voltage a little, and passed 20 runs of ibt for now. im just about to test the power savings with "regular" usage,

why do i need c3 and c6 off when using offset? the whole reason im using offset is because with a manual voltage, it just stays at that voltage no matter what speed the cpu is at, and i dont fancy running 1.38+ volts 24/7 overnight (when my pc usually idles with a few things running, id rather see 1.1volts )

edit: i seem completely stable now with a +0.025 offset and all the power saving features on, not only that i dont need pll overvolt so i can use sleep perfectly too. If i turn the power saving features off cpu-z reports 1.38v idle, 1.30v under load, but with the features on i get 1.000v idle and 1.30v under load, so i assume this would be safe in the long term since i haven't touched any other voltages (LLC is now off)
Edited by Roksonixx - 7/23/11 at 8:11am
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post #4 of 12
Quote:
Originally Posted by Roksonixx View Post
i heard offset and LLC shouldn't be used together, so i disabled LLC, upped the voltage a little, and passed 20 runs of ibt for now. im just about to test the power savings with "regular" usage,

why do i need c3 and c6 off when using offset? the whole reason im using offset is because with a manual voltage, it just stays at that voltage no matter what speed the cpu is at, and i dont fancy running 1.38+ volts 24/7 overnight (when my pc usually idles with a few things running, id rather see 1.1volts )

edit: i seem completely stable now with a +0.025 offset and all the power saving features on, not only that i dont need pll overvolt so i can use sleep perfectly too. If i turn the power saving features off cpu-z reports 1.38v idle, 1.30v under load, but with the features on i get 1.000v idle and 1.30v under load, so i assume this would be safe in the long term since i haven't touched any other voltages (LLC is now off)
Do you think you could post your settings? I can't for the life of me get any voltage stability with LLC off. Under load the voltage can jump between 1.272 to 1.296. That's a pretty big gap...
Edited by nezzarix - 7/26/11 at 5:27am
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post #5 of 12
Thread Starter 
with no LLC it's normal apparantly, thats why i use ultra high LLC to shorten the gap (extreme puts load voltage over idle, which is bad), i was going to use no LLC but i figured i'd have to put a massive offset in which i didnt want or like

i did update my bios, and turn C3/C6 off, which meant i could lower the offset, i dont notice any difference with them off, loads of people complaining about them giving random bsod's

here are my current settings 2500k@4.5ghz

speedstep/c1e ON
c3/c6 OFF
vcore offset: -0.020
all other voltages normal

passes 50 IBT, and im just coming up to 12 hours of prime blend (got an error at 3-4 hours with a -0.030 offset)

load volts are something like 1.344, but with the offset and power savings it downclocks to ~1.000v which is why im using the offset (my rig is stable with a manual vcore of 1.30 but i have to up the offset to keep it bsod'ing from idle)

max temps in realtemp are 75*C, my chip is probably naff with the voltage but i only want 4.5ghz, so i'm happy with the way it is for now,
Edited by Roksonixx - 7/26/11 at 6:26am
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post #6 of 12
As you go higher in clocks without LLC, you are risking your CPU gets killed by unwanted voltage spike.
That is what LLC is for. To protect your CPU. Made by your motherboard company.
So turning LLC ON to some degree is highly recommended.
Unless you are trying for risky 5.4GHz+ Bench run or something that requires absolute stability over risking your CPU to get damaged.
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post #7 of 12
Thread Starter 
Quote:
Originally Posted by Tunagoblin View Post
As you go higher in clocks without LLC, you are risking your CPU gets killed by unwanted voltage spike.
That is what LLC is for. To protect your CPU. Made by your motherboard company.
So turning LLC ON to some degree is highly recommended.
Unless you are trying for risky 5.4GHz+ Bench run or something that requires absolute stability over risking your CPU to get damaged.
i thought it was the other way around......turning llc off is the SAFEST because you know 100% that the voltage will never go past what you set in bios (spikes and all)

if you do set LLC you can't be sure that what you set in bios is the "roof" of the voltage
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post #8 of 12
Quote:
Originally Posted by Roksonixx View Post
i thought it was the other way around......turning llc off is the SAFEST because you know 100% that the voltage will never go past what you set in bios (spikes and all)

if you do set LLC you can't be sure that what you set in bios is the "roof" of the voltage
That's why you have to test each LLC settings and see which one works best for you. I have found LLC at 100% (extreme setting) cause voltage spikes and can sometimes go to 1.496/1.504v, LLC at 75% worked best for me, loads the voltage at 1.472/1.480v while my voltage is set to 1.485v in the BIOS.
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post #9 of 12
Quote:
Originally Posted by Tunagoblin View Post
As you go higher in clocks without LLC, you are risking your CPU gets killed by unwanted voltage spike.
That is what LLC is for. To protect your CPU. Made by your motherboard company.
So turning LLC ON to some degree is highly recommended.
Unless you are trying for risky 5.4GHz+ Bench run or something that requires absolute stability over risking your CPU to get damaged.
This is the exact opposite of what I have read on many OC guides, but at the same time, there are also many articles that agree with what you said. There doesn't seem to be a definite ruling on the matter... Bah.
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post #10 of 12
you're overclocking, why are you trying to save power?
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