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voltage readout (CpuZ/Voltmeter)

post #1 of 10
Thread Starter 
In my sig rig, When i set my bios voltage to 1.38v, with Vdroop set to High
My CpuZ readout goes all the way upto 1.42v (Load)
However when i use a (Voltmeter?) and put it onto my motherboards v-check points, it only shows 1.35v,

So what is the true reading?
v-check-points.jpg

(Load, 1.37 is set in bios)
IMAG0313-1.jpg
load again, 1.37 set in bios)
IMAG0311.jpg

help:(
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post #2 of 10
Voltmeter is true, CPUz volt readings fail, use HWMonitor
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post #3 of 10
Do you have Load Line Calibration enabled?

If you do then it will upp your Vcore when the CPU is under LOAD to compensate for Vdroop (Vcore drop under app load)..

If LLC is enabled then there's nothing to worry about as CPU-Z is showing the actual Vcore..

CHEERS..
     
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post #4 of 10
Quote:
Originally Posted by KingT;12518294 
Do you have Load Line Calibration enabled?

If you do then it will upp your Vcore when the CPU is under LOAD to compensate for Vdroop (Vcore drop under app load)..

If LLC is enabled then there's nothing to worry about as CPU-Z is showing the actual Vcore..

CHEERS..

LLC will increase the Load voltage, but never above the set value.

Without LLC If v is set to 1.48, idle voltage is 1.48, load is something like 1.44.

With max LLC If v is set to 1.48, idle voltage is 1.48, load is 1.48

EDIT: A word of attention: LLC + overvoltage causes dangerous voltage spikes in transition from Load to Idle state, which can crash the sys or/and damage the CPU
Edited by ronnin426850 - 2/25/11 at 12:46am
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post #5 of 10
Thread Starter 
thanks for the replies, i do not have an LLC option but i do have a 'VdrooP control
And it can be set to high or low..

What option is the same as LLC OFF ?
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post #6 of 10
Quote:
Originally Posted by antipesto93;12518382 
thanks for the replies, i do not have an LLC option but i do have a 'VdrooP control
And it can be set to high or low..

What option is the same as LLC OFF ?

Yes, thats the same thing. Urmm. I guess Low?
Edited by ronnin426850 - 2/25/11 at 1:01am
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2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
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Hard DriveHard DriveOptical DriveCooling
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post #7 of 10
Quote:
Originally Posted by ronnin426850;12518312 
LLC will increase the Load voltage, but never above the set value.

Without LLC If v is set to 1.48, idle voltage is 1.48, load is something like 1.44.

With max LLC If v is set to 1.48, idle voltage is 1.48, load is 1.48

EDIT: A word of attention: LLC + overvoltage causes dangerous voltage spikes in transition from Load to Idle state, which can crash the sys or/and damage the CPU

Not on every motherboard..

On some motherboards Vcore would rise above value set in the BIOS with LLC enabled..

As for the LLC being dangerous I would like to see a link to the dead CPU caused by LLC..

I have been using LLC for over a 2 years (since Sept 2008) on this P5Q Pro and never had any issues with it or neither I have killed'/damaged CPU by running it..

CHEERS..
     
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post #8 of 10
Quote:
Originally Posted by KingT;12518403 
Not on every motherboard..

On some motherboards Vcore would rise above value set in the BIOS with LLC enabled..

As for the LLC being dangerous I would like to see a link to the dead CPU caused by LLC..

I have been using LLC for over a 2 years (since Sept 2008) on this P5Q Pro and never had any issues with it or neither I have killed'/damaged CPU by running it..

CHEERS..

There is no such link smile.gif There is no way to diagnose what exactly killed a dead OCd CPU, but LLC + overvoltage crashes mine, and many other systems in Load => Idle transition.
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CPUMotherboardGraphicsRAM
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Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
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Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
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My Rig
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Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
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CaseMouse
DeLUX Logitech 
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post #9 of 10
Quote:
Originally Posted by ronnin426850;12518417 
There is no such link smile.gif There is no way to diagnose what exactly killed a dead OCd CPU, but LLC + overvoltage crashes mine, and many other systems in Load => Idle transition.

Yeah just like I have thought..

Now as for the crashes w/ LLC on I will give you a word of advice..

If your CPU is stable for example @ 3.2GHz with:

Vcore=1.30V LLC ON set in BIOS,

1.27V idle in OS

1.29V under LOAD in Prime95..

In some light applications LLC most likely would not kick in and your CPU would be running @ 1.27V (same as idle Vcore) and not at 1.29V (when LLC kicks in P95) so that Vcore difference would couse a crash in games/web or just in desktop (I had it happened myself)..

So what you should do:

After P95 testing (and passing it ofc) reboot to BIOS and upp Vcore for a couple of notches so that you have that LOAD Vcore of for example 1.29V (with which you're P95 stable) as your 24/7 IDLE Vcore..

By doing that you will have sufficient Vcore all the time,in the light and in heavy load apps and you will never have a BSOD again..

Since I have done it I have never had a BSOD again (for over a year now)..

CHEERS..
     
CPUMotherboardGraphicsRAM
E6750 G0 @ 3.3GHz (1.25V LOAD) Asus P5KPL-VM G31 GeForce 8500GT @ 700/1600/445 Apacer 2x1GB 800MHz 
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Hard DriveOptical DriveOSMonitor
Hitachi Deskstar 160GB (7200,8MB) LG DVD Win 7 Ultimate 64bit build 7601 LG 19" 
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post #10 of 10
Thread Starter 
Wow thanks for the advice, +rep all biggrin.gif
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