Overclock.net › Forums › Intel › Intel CPUs › 1.28V - Undervoltage on Sandybridge 4.3Ghz?
New Posts  All Forums:Forum Nav:

1.28V - Undervoltage on Sandybridge 4.3Ghz?

post #1 of 22
Thread Starter 
Recently I used the OC tuner on my P8P67 pro to achieve a 4.3Ghz overclock (Yes, I'm lazy.)

Today I ran CPU-Z with Prime95 so I could check the voltage at 100% load.

I noticed that at full load the CPU was only using around 1.28v...

I'm completely new to overclocking, so I'm not entirely sure if this could be considered undervoltage. Usually people run 4.5Ghz at 1.35v.

Anybody here with a little experience could reassure me?

(I haven't had any instability or overheating)
Dave
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500k @ 4.3Ghz 1.28v Asus P8P67 Pro x2 HD 5770 (Stock clocks) 4GB G-Skill Ripjaws 1600mhz 
Hard DriveOSMonitorPower
Samsung F3 1TB Windows 7 64bit Dell U2311H Antec Truepower New 750w 
Case
Cooler Master HAF 922 
  hide details  
Reply
Dave
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500k @ 4.3Ghz 1.28v Asus P8P67 Pro x2 HD 5770 (Stock clocks) 4GB G-Skill Ripjaws 1600mhz 
Hard DriveOSMonitorPower
Samsung F3 1TB Windows 7 64bit Dell U2311H Antec Truepower New 750w 
Case
Cooler Master HAF 922 
  hide details  
Reply
post #2 of 22
You sir are lucky smile.gif

You should be able to hit 5ghz even, maybe.
The Butthurt Box
(21 items)
 
   
CPUMotherboardGraphicsGraphics
Intel Core i5 2500K P67 Professional AMD Radeon HD 6950 unlock NVIDIA GeForce GTX 460 2gb 
RAMRAMHard DriveHard Drive
G.Skill Ripjaws G.Skill Ripjaws Intel X25-V Seagate Barracuda 
Hard DriveOptical DriveOSMonitor
WD Goflex USB 3.0 24x DVD R/W DL Win7 Ultermate 64 Acer 20in 1600x900 
MonitorMonitorMonitorKeyboard
Compaq 20in 1600x900 17in Dell 1280x1024 19in Gateway 1280x1024 Razer Blackwidow mech w/ cherry MX blues 
PowerCaseMouseAudio
Kingwin LZ-750 HAF 932 + sound activated lights Logitech G500 Rosewill USB headset 
CPUMotherboardGraphicsRAM
Pentium 4 3.2ghz w/ HT HP Intel IGP 4gb Mushkin DDR2 
Hard DriveOSPowerCase
80gb sata WinXP Pro HP OEM HP Small form factor 
  hide details  
Reply
The Butthurt Box
(21 items)
 
   
CPUMotherboardGraphicsGraphics
Intel Core i5 2500K P67 Professional AMD Radeon HD 6950 unlock NVIDIA GeForce GTX 460 2gb 
RAMRAMHard DriveHard Drive
G.Skill Ripjaws G.Skill Ripjaws Intel X25-V Seagate Barracuda 
Hard DriveOptical DriveOSMonitor
WD Goflex USB 3.0 24x DVD R/W DL Win7 Ultermate 64 Acer 20in 1600x900 
MonitorMonitorMonitorKeyboard
Compaq 20in 1600x900 17in Dell 1280x1024 19in Gateway 1280x1024 Razer Blackwidow mech w/ cherry MX blues 
PowerCaseMouseAudio
Kingwin LZ-750 HAF 932 + sound activated lights Logitech G500 Rosewill USB headset 
CPUMotherboardGraphicsRAM
Pentium 4 3.2ghz w/ HT HP Intel IGP 4gb Mushkin DDR2 
Hard DriveOSPowerCase
80gb sata WinXP Pro HP OEM HP Small form factor 
  hide details  
Reply
post #3 of 22
How long did you run prime? Looks like a good chip thumb.gif
it looks alive
(17 items)
 
Sandy Transformed
(69 photos)
 
CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
  hide details  
Reply
it looks alive
(17 items)
 
Sandy Transformed
(69 photos)
 
CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
  hide details  
Reply
post #4 of 22
Thread Starter 
Quote:
Originally Posted by railfan844;13319547 
You sir are lucky smile.gif

You should be able to hit 5ghz even, maybe.

Really? Not that I would risk it tongue.gif

Heard OC tuner runs it's own stability tests, so perhaps 1.28 is the most stable voltage... I ran prime95 for about thirty minutes and it was stable; temps were 52/57/60/62 at 4.3Ghz.
Dave
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500k @ 4.3Ghz 1.28v Asus P8P67 Pro x2 HD 5770 (Stock clocks) 4GB G-Skill Ripjaws 1600mhz 
Hard DriveOSMonitorPower
Samsung F3 1TB Windows 7 64bit Dell U2311H Antec Truepower New 750w 
Case
Cooler Master HAF 922 
  hide details  
Reply
Dave
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500k @ 4.3Ghz 1.28v Asus P8P67 Pro x2 HD 5770 (Stock clocks) 4GB G-Skill Ripjaws 1600mhz 
Hard DriveOSMonitorPower
Samsung F3 1TB Windows 7 64bit Dell U2311H Antec Truepower New 750w 
Case
Cooler Master HAF 922 
  hide details  
Reply
post #5 of 22
Quote:
Originally Posted by Collie;13319606 
Really? Not that I would risk it tongue.gif

Heard OC tuner runs it's own stability tests, so perhaps 1.28 is the most stable voltage... I ran prime95 for about thirty minutes and it was stable; temps were 52/57/60/62 at 4.3Ghz.

that's pretty good , got a screenie?

I'v seen low as 1.26 for the same overclock lol. check the sandy stable club biggrin.gif
it looks alive
(17 items)
 
Sandy Transformed
(69 photos)
 
CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
  hide details  
Reply
it looks alive
(17 items)
 
Sandy Transformed
(69 photos)
 
CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
  hide details  
Reply
post #6 of 22
Thread Starter 
Quote:
Originally Posted by munaim1;13319566 
How long did you run prime? Looks like a good chip thumb.gif

For thirty minutes.

I only wanted to check the temps, so I stopped the test once they stood still.

Never thought to run it again until today, as temps never went over 48 when playing Crysis or ARMA2.
Dave
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500k @ 4.3Ghz 1.28v Asus P8P67 Pro x2 HD 5770 (Stock clocks) 4GB G-Skill Ripjaws 1600mhz 
Hard DriveOSMonitorPower
Samsung F3 1TB Windows 7 64bit Dell U2311H Antec Truepower New 750w 
Case
Cooler Master HAF 922 
  hide details  
Reply
Dave
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500k @ 4.3Ghz 1.28v Asus P8P67 Pro x2 HD 5770 (Stock clocks) 4GB G-Skill Ripjaws 1600mhz 
Hard DriveOSMonitorPower
Samsung F3 1TB Windows 7 64bit Dell U2311H Antec Truepower New 750w 
Case
Cooler Master HAF 922 
  hide details  
Reply
post #7 of 22
Thread Starter 
Quote:
Originally Posted by munaim1;13319621 
tha'ts pretty good , got a screenie?

I'v seen low as 1.26 for the same overclock lol. check the sandy stable club biggrin.gif

I'll see if I can get a pic.
Dave
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500k @ 4.3Ghz 1.28v Asus P8P67 Pro x2 HD 5770 (Stock clocks) 4GB G-Skill Ripjaws 1600mhz 
Hard DriveOSMonitorPower
Samsung F3 1TB Windows 7 64bit Dell U2311H Antec Truepower New 750w 
Case
Cooler Master HAF 922 
  hide details  
Reply
Dave
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 2500k @ 4.3Ghz 1.28v Asus P8P67 Pro x2 HD 5770 (Stock clocks) 4GB G-Skill Ripjaws 1600mhz 
Hard DriveOSMonitorPower
Samsung F3 1TB Windows 7 64bit Dell U2311H Antec Truepower New 750w 
Case
Cooler Master HAF 922 
  hide details  
Reply
post #8 of 22
Your overclock isn't that great. I've got an average chip that does 4.5Ghz @ 1.28v.
Clevo P650RP6-G
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 6700HQ nVidia GTX1060 6GB Kingston HyperX Impact 2133MHZ 16GB INTEL 600p 128GB 
Hard DriveOS
Samsung 850 EVO 1TB Windows 10 Pro 64 
  hide details  
Reply
Clevo P650RP6-G
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 6700HQ nVidia GTX1060 6GB Kingston HyperX Impact 2133MHZ 16GB INTEL 600p 128GB 
Hard DriveOS
Samsung 850 EVO 1TB Windows 10 Pro 64 
  hide details  
Reply
post #9 of 22
I'd run prime95 or Intel Burn Test for 6-8 hours. If it comes all OK, you might've gotten your hands on a golden chip :O
No matter the tests OC tuner uses, a couple second tests are no indicator of true stability. I'd always run some other stress tests.
X79 The Hydra
(22 items)
 
 
i865G Chronos
(15 items)
 
CPUMotherboardGraphicsRAM
Core 2 Extreme X6800 AsRock 775i65G R2.0 ATI Radeon X1950 XT OCZ EL DDR Gold Edition GX 
Hard DriveOptical DriveCoolingOS
Samsung MMBRE64GHDXP-MVBD1 Samsung SH-222 Thermalright Ultima-90 Windows 98 SE 
OSMonitorKeyboardPower
Windows XP Professional 32 bit Dell SP2309W Genius SlimStar 8000 Generic 500w PSU 
CaseMouseAudio
Generic Case Genius SlimStar 8000 Creative Sound Blaster Audigy 2 ZS 
  hide details  
Reply
X79 The Hydra
(22 items)
 
 
i865G Chronos
(15 items)
 
CPUMotherboardGraphicsRAM
Core 2 Extreme X6800 AsRock 775i65G R2.0 ATI Radeon X1950 XT OCZ EL DDR Gold Edition GX 
Hard DriveOptical DriveCoolingOS
Samsung MMBRE64GHDXP-MVBD1 Samsung SH-222 Thermalright Ultima-90 Windows 98 SE 
OSMonitorKeyboardPower
Windows XP Professional 32 bit Dell SP2309W Genius SlimStar 8000 Generic 500w PSU 
CaseMouseAudio
Generic Case Genius SlimStar 8000 Creative Sound Blaster Audigy 2 ZS 
  hide details  
Reply
post #10 of 22
SB is really really tricky.... I achieved 4.5 @ 1.26v. Passed 8 hours of prime when I woke up, so I stopped it and just considered it stable. One week later and it BSOD'd, I had to feed it 1.35v. It has been stable so far for a few days...

...So far.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › 1.28V - Undervoltage on Sandybridge 4.3Ghz?