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Idle voltage

robj20

robj20

robj20

Soldato
Joined
9 Apr 2007
Posts
14,655
My 2600k has started idleing at full volts, 1.356v currently. The multiplier drops to 16 which is right.
I set all the C1E type stuff to enabled, volts is on auto, its a Gigabyte Z68XP-UD3P.
 
You need to use offset voltage. On my board manual (i.e. fixed) stops all the C states from working.
 
No, thats what im asking about, they dont drop if anything they go up slightly at idle due to vdroop at load bringing it down slightly.

Load 4.4ghz 1.344v and idle is 1.6ghz 1.356v
 
So let me see if I've got this right:
- both the VID and the vCore don't change (apart from the minor vdroop fluctuation).
- the vcore is set in offset mode (what value?)
- turbo multiplier @ x44

I'm guessing you've tried saving the bios and then resetting to factory presets?


Just to clarify:
VID=voltage requested by CPU to VRM
vCore= voltage delivered from VRM to CPU taking offset, vdroop, etc into account.

If the VID doesn't change as well. Then that explains why the vCore doesn't change.
 
Last edited:
Voltage in the bios is set to auto everything, only thing i have changed is set the boost to 44 for all cores.

In cpu-z the voltage for the cpu idles at 1.356v when the multi is dropped to 16, when under load the multi changes to 44, the voltage drops to 1.344v due to vdroop.

I have done a full reset to optimized defaults, no change.
 
Ok, you keep telling me the vCore values. I want to know the VID values. They can be read in real temp and coretemp.

When the multiplier is at stock, does the vcore still stay the same?
 
robj20 said:
VID at idle is 0.9807v and vcore is showing 1.356v
VID at load is 1.3661v and vcore is showing 1.332v
Click to expand...

Thanks, that helps.

So, CPU is requesting the correct voltage. But VRM is delivering wrong vCore. Looks like a motherboard issue. Try CMOS reset and leave multiplier at default. Then in power options on windows, chose the 'high performance' plan, so that windows won't be adjusting your clock. Does the vCore drop to the correct level now, just under 1v?

Another cause could be LLC set too high. Causing the idle voltage to overcompensate for vdroop. What do you have it set to atm?

The other cause could be false reading on CPU-Z. Check BIOS vCore reading to be sure.
 
Reset everything and left everything bar memory profile alone (set to profile 1 for xmp)

Idling now
cpu-z is saying
1.6ghz, 0.972v

core temp is saying
3.3ghz
vid 1.2159v

Not sure why the difference between the programs but at least the voltage has dropped.

multi-steps load line was set to disabled and pll voltage is on auto and showing 1.8v
 
went back and put it up to 43 multi on each core under the boost setting and its back to high voltage idling, so looks like i cant overclock without full volts all the time.
 
robj20 said:
Reset everything and left everything bar memory profile alone (set to profile 1 for xmp)

Idling now
cpu-z is saying
1.6ghz, 0.972v

core temp is saying
3.3ghz
vid 1.2159v

Not sure why the difference between the programs but at least the voltage has dropped.

multi-steps load line was set to disabled and pll voltage is on auto and showing 1.8v
Click to expand...

Ok great, those number look normal.

PLL on auto is correct.


Read this great Gigabyte OC guide and follow the steps to re-apply your overclock. http://www.overclock.net/t/910467/the-ultimate-sandy-bridge-oc-guide-p67a-ud7-performance-review
 
When i set the multi any higher the voltages stay high even at idle, looks like i will have to put up with it or not overclock.
 
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