High idle VCore (1.36v)

[Syther101]

I have recently overclocked my new system (Intel i5 2500k) and have done a number of stress tests which show that my system is running stable. (One of the results of the stress tests can be seen below).
In the tests my VCore would be around 1.34 - 1.38 which is fine for running at full load.

I have noticed that even when my computer clocks down to 1.6Mhz thanks to turbo boost my VCore still stay around 1.34. Why is this and how can I fix it?

I have posted my current BIOS settings below and have tried a few little things to get the VCore better but this causes my system to become unstable and bluescreen.


Thanks for any feedback!

Intel Burn Test results:

Current BIOS config on Gigabyte Z68XP-UD3P motherboard:

Frequency Settings
CPU CLOCK - 33X
BCLK - ( DISABLED ) left at default 100mhz
EXTREME MEMORY PROFILE XMP - ( PROFILE 1 )
SYSTEM MEMORY MULTI - ( AUTO )

Advanced CPU Settings
PWM Frequency Control: Auto
CPU Over Current Protection: Auto
Internal CPU PLL Overvoltage: Enabled
Real-Time Ratio Chnaged In OS: Disabled
Turbo Ration: 45 (All)
Turbo Power Limit: 300
Core Current Limit: 300
CPU Cores Enabled: All
CPU Enhanced Halt (C1E): Auto
C3/C6 State Support: Auto
CPU Thermal Monitor: Disabled
CPU EIST Function: Auto
Bi-Directional PROCHOT

Advanced Memory Settings
Extreme Memory Profile: Profile1
System Memory Multiplier: Auto
DRAM Timing Selectable: Auto
Channel Interleaving: Auto
Rank Interleaving: Auto
Performance Enhance: Standard

Advanced Voltage Settings
Multi-Steps Load-Line: 6
VCore: 1.330
Dynamic Vcore: Auto
QPI/Vtt Voltage: 1.190
System Agent Voltage: Auto
Graphics Core Voltage: Auto
Graphics Core: Auto
Graphics DVID: Auto
CPU PLL: 1.800
DRAM Voltage: 1.600

Misc Settings

ISOCHRONOUS SUPPORT [ ENABLED ]
VIRTUALIZATION TECH [ ENABLED ]

Power Management

HPET SUPPORT [ ENABLED ]
HPET MODE [ 64BIT ] - 64bit windows versions

 

[pgi947]

Sounds like the voltage is set at full manual, where the voltage stays around the same in idle and load.

Try using DVID or Dynamic Vcore as its known on GB boards. More commonly known as voltage offset

 

[Syther101]

Sounds like the voltage is set at full manual, where the voltage stays around the same in idle and load.

Try using DVID or Dynamic Vcore as its known on GB boards. More commonly known as voltage offset

Yeah I was hoping there was something else I could besides that but I guess that's it. Will have to get my system stable again :/, What settings are you using to get such great results on yours?

 

[pgi947]

Just was lucky enough to get a good chip, I know people with the same board, chip, memory and settings as me that need in excess of 1.4v to even boot at 4.8ghz, so its purely luck

You shouldn't have to do too much to set the DVID, grab core temp, take note of the VID while the system is under stress then +/- from that to the desired vcore (in cpuz). That +/- value then becomes your DVID/Offset

For example if your VID was 1.38v and lets say you wanted a vcore or 1.36v the DVID would be -0.020 as thats the difference between the two readings

 

[Syther101]

Just was lucky enough to get a good chip, I know people with the same board, chip, memory and settings as me that need in excess of 1.4v to even boot at 4.8ghz, so its purely luck

You shouldn't have to do too much to set the DVID, grab core temp, take note of the VID while the system is under stress then +/- from that to the desired vcore (in cpuz). That +/- value then becomes your DVID/Offset

For example if your VID was 1.38v and lets say you wanted a vcore or 1.36v the DVID would be -0.020 as thats the difference between the two readings

Will get my BIOS settings saved and have a mess around with it tomorrow , Thanks for the feedback!

 

[Neil79]

More fiddling Syther?

Basically if you use DVID you won't have LLC but the ud3p has a bad vdroop in some situations when using intel burn test. There are other settings you'll need to play with as well because the dvid idle volts might cause a bsod.

 

[Syther101]

More fiddling Syther?

Basically if you use DVID you won't have LLC but the ud3p has a bad vdroop in some situations when using intel burn test. There are other settings you'll need to play with as well because the dvid idle volts might cause a bsod.

Haha yes. Just trying to understand it all. Like to know all about my system and fiddle , Is my first custom build so you can't blame me XD

Yeah I was doing some more research on it around the web and seeing as I game on my PC VDroop could be a problem so I reckon I will leave it how it is now as like you said before I would prefer my system be stable then start getting BSOD thanks to VDroop

 

[Syther101]

More fiddling Syther?

Basically if you use DVID you won't have LLC but the ud3p has a bad vdroop in some situations when using intel burn test. There are other settings you'll need to play with as well because the dvid idle volts might cause a bsod.

What does your VCore tend to idle at?, And because of this does it mean that my CPU will be using full power all the time?, If so surely there is no point of down clocking?