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post #211 of 369
Quote:
Originally Posted by kevindd992002 View Post

Thanks for the confirmation. I guess we don't have a choice but to stay with EIST if we want C3 and C6 enabled?
Since we can't actually turn off EIST, yes. In a way, ASUS way "disabling" EIST does work. When EIST is "disabled" in BIOS & the rest of C states are enabled, CPU does most of the time run at max frequency but it also rapidly transition back & forth between max frequency & LFM frequency.

I don't have the same generation of processors for me to compare, so this comparison might not ideal. I have SB-E & first gen Intel Core mobile processor. SB-E is on ASUS motherboard where when EIST is "disabled" in BIOS, EIST in fact still enabled but like I mention above, CPU most of the time running at max frequency but it also rapidly transition back & forth between max frequency & LFM frequency because of C1E/C3/C6 states are enabled. While on the first gen Intel Core processor, when EIST is disabled in BIOS, EIST does disabled but CPU frequency is locked at LFM frequency. The only way to get it run >LFM is by manually setting the multiplier. So, probably ASUS ways is their own tweak for CPU to run at max frequency instead of LFM.
Quote:
Originally Posted by kevindd992002 View Post

I'm basing my power readings on a APC BR-1500GI UPS with a LED display. These are pretty much accurate readings just like the Kill-A-Watt meter. Well, I didn't monitor the idle voltage because I was assuming that the real voltage at idle is close to 0.000V because all cores enter C6 state. Yup, 4W is a small difference but it is still there. Fixed vcore is 4 Watts higher in idle power consumption for me compared to Offset.
I can only monitor power consumption using Open Hardware Monitor. It always fluctuate, meaning not constant (when idle). That's why 4W is too small to proved anything, possibly just a fluke.
Edited by kizwan - 2/19/13 at 9:44pm
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post #212 of 369
Quote:
Originally Posted by kizwan View Post

Since we can't actually turn off EIST, yes. In a way, ASUS way "disabling" EIST does work. When EIST is "disabled" in BIOS & the rest of C states are enabled, CPU does most of the time run at max frequency but it also rapidly transition back & forth between max frequency & LFM frequency.

I don't have the same generation of processors for me to compare, so this comparison might not ideal. I have SB-E & first gen Intel Core mobile processor. SB-E is on ASUS motherboard where when EIST is "disabled" in BIOS, EIST in fact still enabled but like I mention above, CPU most of the time running at max frequency but it also rapidly transition back & forth between max frequency & LFM frequency because of C1E/C3/C6 states are enabled. While on the first gen Intel Core processor, when EIST is disabled in BIOS, EIST does disabled but CPU frequency is locked at LFM frequency. The only way to get it run >LFM is by manually setting the multiplier. So, probably ASUS ways is their own tweak for CPU to run at max frequency instead of LFM.
I can only monitor power consumption using Open Hardware Monitor. It always fluctuate, meaning not constant (when idle). That's why 4W is too small to proved anything, possibly just a fluke.

Thanks. What is LFM frequency? Lowest fixed multiplier?

So if I disable EIST, then C1E, C3, and C6 gets automatically enabled even though I set them as disabled in BIOS?

My observations regarding the 4W difference is fairly stable and not fluctuating. So 4W isn't caused by a variable change.
post #213 of 369
LFM stand for Low Frequency Mode. For SB is 1600MHz if I'm not mistaken.

No, disabling EIST will not enable C1E/C3/C6 state automatically.
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post #214 of 369
Quote:
Originally Posted by kizwan View Post

LFM stand for Low Frequency Mode. For SB is 1600MHz if I'm not mistaken.

No, disabling EIST will not enable C1E/C3/C6 state automatically.

Oh ok. If I want to run at fixed frequency mode, I should disable C1E also, right?
post #215 of 369
Quote:
Originally Posted by kizwan View Post

I can only monitor power consumption using Open Hardware Monitor. It always fluctuate, meaning not constant (when idle).

Doesn't that just get the number from VID so it's not 'real'..?
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post #216 of 369
Quote:
Originally Posted by kevindd992002 View Post

Oh ok. If I want to run at fixed frequency mode, I should disable C1E also, right?
Yes, disabled all C-States.

You can leave all C-States enabled & set minimum processor state in windows power option to 100%. This give same effect, allowing CPU to run at fixed/max frequency all the time. Did you try this yet?
Quote:
Originally Posted by error-id10t View Post

Doesn't that just get the number from VID so it's not 'real'..?
It's the "closest" tool I have & can use right now. If I'm not mistaken some review use it in their review.
Edited by kizwan - 2/19/13 at 10:55pm
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post #217 of 369
Quote:
Originally Posted by kizwan View Post

You can leave all C-States enabled & set minimum processor state in windows power option to 100%. This give same effect, allowing CPU to run at fixed/max frequency all the time. Did you try this yet?

That doesn't work. Even with High Performance, or 100% min CPU state, the CPU will still downclock if the BIOS power states are active. Although I guess that could depend on the motherboard. Check with Realtemp or Throttlestop and see.
post #218 of 369
Quote:
Originally Posted by kizwan View Post

Yes, disabled all C-States.

You can leave all C-States enabled & set minimum processor state in windows power option to 100%. This give same effect, allowing CPU to run at fixed/max frequency all the time. Did you try this yet?

Ah. Well, I do not want to disable C3 and C6 because my goal is to make my CPU sleep most of the time at C6. Unclewebb said that if C3 and C6 are disabled then there would be no time that it would be at C1E so that's why he recommended it to be disabled. Do you think it's better to keep C1E enabled also?

I tried that already, using High Performance windows power plan which has its minimum processor state at 100% but when I monitor through RealTemp, the multiplier is still fluctuating and is not fixed at 47x.
post #219 of 369
this is a big topic if I don't care about power saving at all but just the lifespan of the cpu which would be better to use offset or manual.

if I am understanding this correctly unclewebb is saying that even if the voltage is manual in bios if c6 and c3 are enabled the voltage still drops down on the cores when they are in that state. the thing that confuses me is what is showing that the voltage is actually droping because if I use manual voltage cpuz, and HWM all show the constant voltage even if I check realtemp csates and it shows them in c state
post #220 of 369
Quote:
Originally Posted by enigma7820 View Post

this is a big topic if I don't care about power saving at all but just the lifespan of the cpu which would be better to use offset or manual.

if I am understanding this correctly unclewebb is saying that even if the voltage is manual in bios if c6 and c3 are enabled the voltage still drops down on the cores when they are in that state. the thing that confuses me is what is showing that the voltage is actually droping because if I use manual voltage cpuz, and HWM all show the constant voltage even if I check realtemp csates and it shows them in c state

You cannot measure the actual voltage when the cores are in C6 state through software. A specialized hardware, maybe an oscilloscope, will do the job. The readings in softwares, like CPUZ and HWM, are only accurate when the CPU is at load and not when it is idle. At least that's what I understand in this long discussion.
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