Overclock.net › Forums › Intel › Intel CPUs › How can i get exact voltage on CPU?
New Posts  All Forums:Forum Nav:

How can i get exact voltage on CPU?

post #1 of 12
Thread Starter 
Hello!

I have an overclocked intel core i5, currently the votage is set to auto (1.3V) and I'd like to lower it, but I'm not sure if it will yield the exact voltage i specify.

The bios says the cpu is at 1.3V. When its on full load (100% cpu usage), by other programs (Rybka Aquarium), the voltage stays at 1.3V. However when I ma running Prime95, the voltage shows in cpuz as 1.26 confused.gif - I assume its V-droop. I tryed enabling Load line Calibration and that brought my voltage up to 3.46V! eek.gif So I set it back as disabled.

I am afraid to lower my voltage from auto since I don't know if there will be v-droop which could lower my cpu voltage too low :/

Is there anything I can do to get the processor to constantly maintain the voltage I set in the bios? Or how can I predict what effective voltage will be yielded.

Additional info:
-I've oc'ed to 3.36Ghz via Bus:160mhz Multiplyer: 21x (since I have Turbo Boost on)
-I use the Asus P7P55D-Pro Motherboard
-My temps with Rybka Aquarium 53-55C and Temps with Prime95 60C
-CPU Cooler: Cooler Master Hyper 212+
-QPI speed: 2.8GHz (VTT voltage on Auto)
-Intel Speed step is Enabled
-CPU & PCI-e Spectrums are Disabled
-Intel C-Start Tech + is Disabled
-I'll certainly post anymore information if needed
    
CPUMotherboardGraphicsRAM
Core i5 - 750 @ 3.35GHz (159x21), Cooled by Hy... Asus P7P55D Pro Sapphire AMD Radeon R9 270X OC x2 4GB (8gb) Kingston DDR3 1600MHz 
Hard DriveOptical DriveOSMonitor
x2 500gb and a 1000gb CD/DVD RW drive Windows 7 Premium x64 22" Samsung SyncMaster 2233 120Hz 
KeyboardPowerCaseMouse
Logitech Internet 350 Antech True Power 750watt Coolermaster Storm Scout Gigabyte M7 800/1600/3200dpi 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Core i5 - 750 @ 3.35GHz (159x21), Cooled by Hy... Asus P7P55D Pro Sapphire AMD Radeon R9 270X OC x2 4GB (8gb) Kingston DDR3 1600MHz 
Hard DriveOptical DriveOSMonitor
x2 500gb and a 1000gb CD/DVD RW drive Windows 7 Premium x64 22" Samsung SyncMaster 2233 120Hz 
KeyboardPowerCaseMouse
Logitech Internet 350 Antech True Power 750watt Coolermaster Storm Scout Gigabyte M7 800/1600/3200dpi 
  hide details  
Reply
post #2 of 12
No, you can't get it exact. Just set it to whatever you want. Turn off vdroop. Then run prime95 for stablilty. Vdroop will cause more instability, so I turn it off. If you're overclocking though, don't leave the voltage on auto.
    
CPUMotherboardGraphicsRAM
Core i7 920 4ghz 1.25v Evga Classified E760/E762 Evga Gtx 480 + Galaxy GTX 480 SLI 6GB Corsair Dominator GT 1600mhz 
Hard DriveOSMonitorKeyboard
Crucial C300 256Gb, Samsung 7200rpm 320gb, 2x W... Windows 7 64-bit Home premium Dell U2410 1920x1200 Wireless Logitech 
PowerCaseMouseMouse Pad
Antec Quatro 1200w Corsair 800D Razer Death Adder Office Depot thingy 
AudioAudio
Asus Xonar STX Sennheiser HD555's 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Core i7 920 4ghz 1.25v Evga Classified E760/E762 Evga Gtx 480 + Galaxy GTX 480 SLI 6GB Corsair Dominator GT 1600mhz 
Hard DriveOSMonitorKeyboard
Crucial C300 256Gb, Samsung 7200rpm 320gb, 2x W... Windows 7 64-bit Home premium Dell U2410 1920x1200 Wireless Logitech 
PowerCaseMouseMouse Pad
Antec Quatro 1200w Corsair 800D Razer Death Adder Office Depot thingy 
AudioAudio
Asus Xonar STX Sennheiser HD555's 
  hide details  
Reply
post #3 of 12
Thread Starter 
Quote:
Originally Posted by Willanhanyard;11858337 
Turn off vdroop.

How do I turn off V_droop? Sorry if its a stupid question tongue.gif
    
CPUMotherboardGraphicsRAM
Core i5 - 750 @ 3.35GHz (159x21), Cooled by Hy... Asus P7P55D Pro Sapphire AMD Radeon R9 270X OC x2 4GB (8gb) Kingston DDR3 1600MHz 
Hard DriveOptical DriveOSMonitor
x2 500gb and a 1000gb CD/DVD RW drive Windows 7 Premium x64 22" Samsung SyncMaster 2233 120Hz 
KeyboardPowerCaseMouse
Logitech Internet 350 Antech True Power 750watt Coolermaster Storm Scout Gigabyte M7 800/1600/3200dpi 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Core i5 - 750 @ 3.35GHz (159x21), Cooled by Hy... Asus P7P55D Pro Sapphire AMD Radeon R9 270X OC x2 4GB (8gb) Kingston DDR3 1600MHz 
Hard DriveOptical DriveOSMonitor
x2 500gb and a 1000gb CD/DVD RW drive Windows 7 Premium x64 22" Samsung SyncMaster 2233 120Hz 
KeyboardPowerCaseMouse
Logitech Internet 350 Antech True Power 750watt Coolermaster Storm Scout Gigabyte M7 800/1600/3200dpi 
  hide details  
Reply
post #4 of 12
Quote:
Originally Posted by toxaris71;11858436 
How do I turn off V_droop? Sorry if its a stupid question tongue.gif
By turn off V_droop he means to turn on LLC if your motherboard supports it.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 2500k P8P67 Pro GeForce 460 GTX 768 2x4gb G.Skill Ripjaws 
Hard DriveOSMonitorPower
120gb SSD, 1tb Samsung HDD Windows 7 64-Bit Samsung Syncmaster 226BW 850 Watt Cooler Master 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 2500k P8P67 Pro GeForce 460 GTX 768 2x4gb G.Skill Ripjaws 
Hard DriveOSMonitorPower
120gb SSD, 1tb Samsung HDD Windows 7 64-Bit Samsung Syncmaster 226BW 850 Watt Cooler Master 
  hide details  
Reply
post #5 of 12
Quote:
Originally Posted by toxaris71;11858436 
How do I turn off V_droop? Sorry if its a stupid question tongue.gif

Vdroop is only for evga motherboards. It just makes it so the voltage that you set it to, will be more like what you set it for, and not "droop" or lower. I forgot what it's called on other motherboards.
    
CPUMotherboardGraphicsRAM
Core i7 920 4ghz 1.25v Evga Classified E760/E762 Evga Gtx 480 + Galaxy GTX 480 SLI 6GB Corsair Dominator GT 1600mhz 
Hard DriveOSMonitorKeyboard
Crucial C300 256Gb, Samsung 7200rpm 320gb, 2x W... Windows 7 64-bit Home premium Dell U2410 1920x1200 Wireless Logitech 
PowerCaseMouseMouse Pad
Antec Quatro 1200w Corsair 800D Razer Death Adder Office Depot thingy 
AudioAudio
Asus Xonar STX Sennheiser HD555's 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Core i7 920 4ghz 1.25v Evga Classified E760/E762 Evga Gtx 480 + Galaxy GTX 480 SLI 6GB Corsair Dominator GT 1600mhz 
Hard DriveOSMonitorKeyboard
Crucial C300 256Gb, Samsung 7200rpm 320gb, 2x W... Windows 7 64-bit Home premium Dell U2410 1920x1200 Wireless Logitech 
PowerCaseMouseMouse Pad
Antec Quatro 1200w Corsair 800D Razer Death Adder Office Depot thingy 
AudioAudio
Asus Xonar STX Sennheiser HD555's 
  hide details  
Reply
post #6 of 12
Quote:
Originally Posted by Willanhanyard;11858776 
Vdroop is only for evga motherboards. It just makes it so the voltage that you set it to, will be more like what you set it for, and not "droop" or lower. I forgot what it's called on other motherboards.

when you click "enable vdroop" or "disable vdroop", you are actually enabling what is called Load Line Calibration, which stabilizes your vcore under high cpu stress. If you have an asus or gigabyte board, keep your eye out on LLC, and enable it. LLC and disabling vdroop are essentially the same thing with different names.

Re: your ~3volt vcore--the readout for your vcore must be wrong because your CPU would fry at that voltage. Have you tried different programs such as speedfan?

Also, you really need to start testing your own voltages instead of auto. I think you can do much less voltage with those clocks.
Edited by FIREitUP - 1/1/11 at 9:13pm
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 760 4.09ghz 21x193 1.3 Vcore 1.29 VTT Gigabyte GA-P55-USB3 MSI Cyclone GTX 460 1gb 4gb OCZ Platinum Cas 6 
PowerCase
NeoHE 550 Antec P182 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 760 4.09ghz 21x193 1.3 Vcore 1.29 VTT Gigabyte GA-P55-USB3 MSI Cyclone GTX 460 1gb 4gb OCZ Platinum Cas 6 
PowerCase
NeoHE 550 Antec P182 
  hide details  
Reply
post #7 of 12
If you peruse your manual in the BIOS section you will find an entry on this. In my manual it's in section 3.5.23.
alpha updated
(19 items)
 
secundus
(14 items)
 
 
CPUMotherboardGraphicsRAM
i7 4790k Gigabyte GA-Z97X Gaming-7 Intel HD4600 Crucial Ballistix Sport Very Low Profile 8GB Ki... 
Hard DriveCoolingOSMonitor
Samsung 840 EVO 500GB Prolimatech Megahalems Rev. C Windows 8.1 Home Premium 64-bit Acer K242HL 
KeyboardPowerCaseMouse
Dell SK-8110 (PS/2) Seasonic X460 Fanless motherboard tray from CM ATCS 840 Logitech MX 1100 
Mouse PadAudio
Dell Creative SoundBlaster X-Fi MB3 
CPUMotherboardGraphicsRAM
i7 860 Gigabyte GA P55M UD2 ZOTAC/NVidia GTX 650 Ti 2GB 4x4GB G.Skill Ripjaws DDR3-1333 CAS9 
Hard DriveOptical DriveCoolingOS
Samsung 1TB Spinpoint F3 7200.12 Plextor 24x DVD burner Cooler Master Hyper Z600R Win7 64-bit 
MonitorKeyboardPowerCase
Dell E207WFP 20-inch flat panel Logitech Wireless 510 Seasonic X-650 fully modular 80+ Gold Lian Li PC-7FN 
MouseMouse PadAudio
Wireless Mouse WACOM Intuos 3 generic 
  hide details  
Reply
alpha updated
(19 items)
 
secundus
(14 items)
 
 
CPUMotherboardGraphicsRAM
i7 4790k Gigabyte GA-Z97X Gaming-7 Intel HD4600 Crucial Ballistix Sport Very Low Profile 8GB Ki... 
Hard DriveCoolingOSMonitor
Samsung 840 EVO 500GB Prolimatech Megahalems Rev. C Windows 8.1 Home Premium 64-bit Acer K242HL 
KeyboardPowerCaseMouse
Dell SK-8110 (PS/2) Seasonic X460 Fanless motherboard tray from CM ATCS 840 Logitech MX 1100 
Mouse PadAudio
Dell Creative SoundBlaster X-Fi MB3 
CPUMotherboardGraphicsRAM
i7 860 Gigabyte GA P55M UD2 ZOTAC/NVidia GTX 650 Ti 2GB 4x4GB G.Skill Ripjaws DDR3-1333 CAS9 
Hard DriveOptical DriveCoolingOS
Samsung 1TB Spinpoint F3 7200.12 Plextor 24x DVD burner Cooler Master Hyper Z600R Win7 64-bit 
MonitorKeyboardPowerCase
Dell E207WFP 20-inch flat panel Logitech Wireless 510 Seasonic X-650 fully modular 80+ Gold Lian Li PC-7FN 
MouseMouse PadAudio
Wireless Mouse WACOM Intuos 3 generic 
  hide details  
Reply
post #8 of 12
Thread Starter 
Quote:
Originally Posted by FIREitUP;11859018 
Re: your ~3volt vcore--the readout for your vcore must be wrong because your CPU would fry at that voltage.

LOL I think u read incorrectly, I wrote 1.3 volts tongue.gif

anyway thanks for the tips, I guess I'll try manual voltages and enable LLC and see what happens. I'm starting to think that when i enabled LLC last time, the mobo added some extra voltage its self and that probably why i got 1.35V

I also realized that my 1.65V ram was running at 1.78V on auto for about a year now hmmsmiley02.gif (at Stock speeds and timings). I guess that proves the point that auto voltage is not very effective

Thanks for the help, I'll post the outcome on this thread smile.gif
    
CPUMotherboardGraphicsRAM
Core i5 - 750 @ 3.35GHz (159x21), Cooled by Hy... Asus P7P55D Pro Sapphire AMD Radeon R9 270X OC x2 4GB (8gb) Kingston DDR3 1600MHz 
Hard DriveOptical DriveOSMonitor
x2 500gb and a 1000gb CD/DVD RW drive Windows 7 Premium x64 22" Samsung SyncMaster 2233 120Hz 
KeyboardPowerCaseMouse
Logitech Internet 350 Antech True Power 750watt Coolermaster Storm Scout Gigabyte M7 800/1600/3200dpi 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Core i5 - 750 @ 3.35GHz (159x21), Cooled by Hy... Asus P7P55D Pro Sapphire AMD Radeon R9 270X OC x2 4GB (8gb) Kingston DDR3 1600MHz 
Hard DriveOptical DriveOSMonitor
x2 500gb and a 1000gb CD/DVD RW drive Windows 7 Premium x64 22" Samsung SyncMaster 2233 120Hz 
KeyboardPowerCaseMouse
Logitech Internet 350 Antech True Power 750watt Coolermaster Storm Scout Gigabyte M7 800/1600/3200dpi 
  hide details  
Reply
post #9 of 12
Quote:
Originally Posted by toxaris71;11859326 
LOL I think u read incorrectly, I wrote 1.3 volts tongue.gif

anyway thanks for the tips, I guess I'll try manual voltages and enable LLC and see what happens. I'm starting to think that when i enabled LLC last time, the mobo added some extra voltage its self and that probably why i got 1.35V

I also realized that my 1.65V ram was running at 1.78V on auto for about a year now hmmsmiley02.gif (at Stock speeds and timings). I guess that proves the point that auto voltage is not very effective

Thanks for the help, I'll post the outcome on this thread smile.gif

you definately dont want to leave any voltages on auto when overclocking because your bios will OVERvolt them. this can be bad. go into your bios, and load optimized defaults then save and reboot. Now enter bios again and go to the voltage adjustment portion. Now next to the voltage settings(should say auto) you will see your actual voltages, these are your stock voltages. write them down. these are important to know. now the stock voltages we just talked about, enter them manualy in the parts that say auto. and if you have an option save this as a profile for future reference.

now if you want to overclock, increase the bclk, 160 is a good start and increase your vcore a few notches above stock. test for stability with prime95. if you get an error increase the vcore more. if you get a bluescreen increase the vtt a notch or two.

dont go above 1.4 vcore, and make sure you have "with vdroop" or "load line calibration disabled" use those options as a last resort to gain stability.

after you can pass atleast 12 hours of prime95 blend(24hours is best) you can either go for a higher overclock, or fine tune the current overclock. fine tuning is time consuming. basically you take your overclock and decrease the vcore 1 notch, then run 12-24 hours of prime95. if pass rinse and repeat until you lose stability. once you lose stability go back up 1 notch. after you find your lowest stable vcore, you do the exact same thing with vtt.
Edited by AliceInChains - 1/1/11 at 11:36pm
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
2600k p8p67 deluxe reference gtx 680 Ripjaws(blue)1866, 8-9-8-24-2t 
Hard DriveOptical DriveOSMonitor
c300, 2X WD CAVAIAR BLACK 640GB RAID 0 LG Bluray/Dvd Rewriter 7 Ult Gateway 24" lcd 1920x1200 
KeyboardPowerCaseMouse
Lycosa Corsair 750w tx Cooler Master HAF 932 black g9 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
2600k p8p67 deluxe reference gtx 680 Ripjaws(blue)1866, 8-9-8-24-2t 
Hard DriveOptical DriveOSMonitor
c300, 2X WD CAVAIAR BLACK 640GB RAID 0 LG Bluray/Dvd Rewriter 7 Ult Gateway 24" lcd 1920x1200 
KeyboardPowerCaseMouse
Lycosa Corsair 750w tx Cooler Master HAF 932 black g9 
  hide details  
Reply
post #10 of 12
Quote:
Originally Posted by toxaris71;11859326 
LOL I think u read incorrectly, I wrote 1.3 volts tongue.gif

anyway thanks for the tips, I guess I'll try manual voltages and enable LLC and see what happens. I'm starting to think that when i enabled LLC last time, the mobo added some extra voltage its self and that probably why i got 1.35V

I also realized that my 1.65V ram was running at 1.78V on auto for about a year now hmmsmiley02.gif (at Stock speeds and timings). I guess that proves the point that auto voltage is not very effective

Thanks for the help, I'll post the outcome on this thread smile.gif

You said 3.46v.
Quote:
Originally Posted by toxaris71;11858235 
I tryed enabling Load line Calibration and that brought my voltage up to 3.46V! eek.gif So I set it back as disabled

Anyway if it is stable, I'd just leave LLC off.
Rig
(9 items)
 
  
CPUMotherboardGraphicsRAM
5820k ga-x99-sli gigabyte 7970 wf 16gb 4x4 lpx 
Hard DriveCoolingPowerCase
samsung 830 128gb ven x/gt ap-15 evga g2 650w corsair 450d 
Audio
jbl lsr305 
  hide details  
Reply
Rig
(9 items)
 
  
CPUMotherboardGraphicsRAM
5820k ga-x99-sli gigabyte 7970 wf 16gb 4x4 lpx 
Hard DriveCoolingPowerCase
samsung 830 128gb ven x/gt ap-15 evga g2 650w corsair 450d 
Audio
jbl lsr305 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › How can i get exact voltage on CPU?