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I5-4670K crazy voltage

post #1 of 10
Thread Starter 
Hello,
2 days ago i bought an i5-4670K and Asus Z87-A motherboard. Yesterday I overclocked it to 4.5 GHz (45x100) and it was stable at 1.2V (temps ~70°C in prime95)
Today I ran prime95 once again and the cpu set itself over 1.31V (temps hit 90°C). I tried to decrease the voltage offset in bios to reach 1.2V again, but I got bluescreen at start. with 1.264V i get bluescreen after 5 seconds in prime95
Stock voltages have changed as well: yesterday it was 1.008V now its 1.040V. Moreover with 1.008V the turbo boost was working (speed 35x100) , and with 1.040 it doesnt work (speed 34x100)

My PSU is OCZ ModXStream Pro 600W and CPU cooler Scythe Ninja 3 rev. B

any advices?
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post #2 of 10
Quote:
Originally Posted by ibhso View Post

Hello,
2 days ago i bought an i5-4670K and Asus Z87-A motherboard. Yesterday I overclocked it to 4.5 GHz (45x100) and it was stable at 1.2V (temps ~70°C in prime95)
Today I ran prime95 once again and the cpu set itself over 1.31V (temps hit 90°C). I tried to decrease the voltage offset in bios to reach 1.2V again, but I got bluescreen at start. with 1.264V i get bluescreen after 5 seconds in prime95
Stock voltages have changed as well: yesterday it was 1.008V now its 1.040V. Moreover with 1.008V the turbo boost was working (speed 35x100) , and with 1.040 it doesnt work (speed 34x100)

My PSU is OCZ ModXStream Pro 600W and CPU cooler Scythe Ninja 3 rev. B

any advices?

Set the BIOS to stock values and test the CPU for stability. We need to make sure we don't have an incorrect BIOS setting or hardware failure.
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post #3 of 10
Thread Starter 
ok i have reset the bios by removing battery on the motherboard, but it changed nothing - voltage under load is still 1.04V instead of 1.008V like it was before. prime95 is still running and it seems stable. btw during the night thousands of windows updates and service packs got installed, could they cause this problem?
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CoolingOSPower
Stock Windows XP Modecom 350W 
CPUMotherboardGraphicsRAM
i5 4670K @ 4.5GHz Asus Z87-A NVIDIA GTX 660 Ti EVGA GoodRam 12GB DDR3 
Hard DriveCoolingOSKeyboard
Samsung HD502HJ Scythe Ninja 3 rev. B Windows 7 64bit Home Premium Logitech 
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CPUMotherboardGraphicsRAM
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Mouse
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CPUMotherboardGraphicsHard Drive
AMD Athlon 64 3000+ Venice @ 2.47GHz Gigabyte GA-K8N51GMF-9-RH Nvidia Geforce 8600GT EVGA laptop hdd 160GB 
CoolingOSPower
Stock Windows XP Modecom 350W 
CPUMotherboardGraphicsRAM
i5 4670K @ 4.5GHz Asus Z87-A NVIDIA GTX 660 Ti EVGA GoodRam 12GB DDR3 
Hard DriveCoolingOSKeyboard
Samsung HD502HJ Scythe Ninja 3 rev. B Windows 7 64bit Home Premium Logitech 
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post #4 of 10
Quote:
Originally Posted by ibhso View Post

ok i have reset the bios by removing battery on the motherboard, but it changed nothing - voltage under load is still 1.04V instead of 1.008V like it was before. prime95 is still running and it seems stable. btw during the night thousands of windows updates and service packs got installed, could they cause this problem?

Usually no. Are you using the latest BIOS? BTW, my VID on my CPU also changed to a higher value from when I first installed my i7 3930K.
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Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
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Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
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post #5 of 10
Thread Starter 
well i have just updated BIOS to the latest version but it didnt change anything

Edit: I noticed that "CPU Voltage" in BIOS is the same yesterday and today - 0.96V
Edited by ibhso - 6/22/13 at 3:22am
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CPUMotherboardGraphicsHard Drive
AMD Athlon 64 3000+ Venice @ 2.47GHz Gigabyte GA-K8N51GMF-9-RH Nvidia Geforce 8600GT EVGA laptop hdd 160GB 
CoolingOSPower
Stock Windows XP Modecom 350W 
CPUMotherboardGraphicsRAM
i5 4670K @ 4.5GHz Asus Z87-A NVIDIA GTX 660 Ti EVGA GoodRam 12GB DDR3 
Hard DriveCoolingOSKeyboard
Samsung HD502HJ Scythe Ninja 3 rev. B Windows 7 64bit Home Premium Logitech 
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Samsung 3.2GB LG 32X Windows 98 SE CRT 
Mouse
ball mouse :D 
CPUMotherboardGraphicsHard Drive
AMD Athlon 64 3000+ Venice @ 2.47GHz Gigabyte GA-K8N51GMF-9-RH Nvidia Geforce 8600GT EVGA laptop hdd 160GB 
CoolingOSPower
Stock Windows XP Modecom 350W 
CPUMotherboardGraphicsRAM
i5 4670K @ 4.5GHz Asus Z87-A NVIDIA GTX 660 Ti EVGA GoodRam 12GB DDR3 
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post #6 of 10
checked load line calibration setting?
post #7 of 10
Thread Starter 
its all on AUTO
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ball mouse :D 
CPUMotherboardGraphicsHard Drive
AMD Athlon 64 3000+ Venice @ 2.47GHz Gigabyte GA-K8N51GMF-9-RH Nvidia Geforce 8600GT EVGA laptop hdd 160GB 
CoolingOSPower
Stock Windows XP Modecom 350W 
CPUMotherboardGraphicsRAM
i5 4670K @ 4.5GHz Asus Z87-A NVIDIA GTX 660 Ti EVGA GoodRam 12GB DDR3 
Hard DriveCoolingOSKeyboard
Samsung HD502HJ Scythe Ninja 3 rev. B Windows 7 64bit Home Premium Logitech 
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CPUMotherboardGraphicsRAM
Intel Celeron 466MHz HP socket PPGA370 S3 Savage 4 Extreme 32MB 64MB SDRAM 
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Samsung 3.2GB LG 32X Windows 98 SE CRT 
Mouse
ball mouse :D 
CPUMotherboardGraphicsHard Drive
AMD Athlon 64 3000+ Venice @ 2.47GHz Gigabyte GA-K8N51GMF-9-RH Nvidia Geforce 8600GT EVGA laptop hdd 160GB 
CoolingOSPower
Stock Windows XP Modecom 350W 
CPUMotherboardGraphicsRAM
i5 4670K @ 4.5GHz Asus Z87-A NVIDIA GTX 660 Ti EVGA GoodRam 12GB DDR3 
Hard DriveCoolingOSKeyboard
Samsung HD502HJ Scythe Ninja 3 rev. B Windows 7 64bit Home Premium Logitech 
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post #8 of 10
Are you using static or offset vcore? Test the load line calibration setting by setting it to low, then running prime with cpuz open to view voltage (it will probably cause the voltage to drop and bsod) then repeat with the next llc setting until it acts sensibly, be careful not to set llc too high otherwise it may result in too high core under load

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post #9 of 10
Thread Starter 
Well, the problem was with windows updates and service packs. I have reinstalled windows and everything is like it should be now
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Intel Celeron 466MHz HP socket PPGA370 S3 Savage 4 Extreme 32MB 64MB SDRAM 
Hard DriveOptical DriveOSMonitor
Samsung 3.2GB LG 32X Windows 98 SE CRT 
Mouse
ball mouse :D 
CPUMotherboardGraphicsHard Drive
AMD Athlon 64 3000+ Venice @ 2.47GHz Gigabyte GA-K8N51GMF-9-RH Nvidia Geforce 8600GT EVGA laptop hdd 160GB 
CoolingOSPower
Stock Windows XP Modecom 350W 
CPUMotherboardGraphicsRAM
i5 4670K @ 4.5GHz Asus Z87-A NVIDIA GTX 660 Ti EVGA GoodRam 12GB DDR3 
Hard DriveCoolingOSKeyboard
Samsung HD502HJ Scythe Ninja 3 rev. B Windows 7 64bit Home Premium Logitech 
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OCZ ModXStream Pro 600W Corsair Carbide 500R white Creative SoundBlaster X-Fi XtremeGamer 
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old and sweet
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CPUMotherboardGraphicsRAM
Intel Celeron 466MHz HP socket PPGA370 S3 Savage 4 Extreme 32MB 64MB SDRAM 
Hard DriveOptical DriveOSMonitor
Samsung 3.2GB LG 32X Windows 98 SE CRT 
Mouse
ball mouse :D 
CPUMotherboardGraphicsHard Drive
AMD Athlon 64 3000+ Venice @ 2.47GHz Gigabyte GA-K8N51GMF-9-RH Nvidia Geforce 8600GT EVGA laptop hdd 160GB 
CoolingOSPower
Stock Windows XP Modecom 350W 
CPUMotherboardGraphicsRAM
i5 4670K @ 4.5GHz Asus Z87-A NVIDIA GTX 660 Ti EVGA GoodRam 12GB DDR3 
Hard DriveCoolingOSKeyboard
Samsung HD502HJ Scythe Ninja 3 rev. B Windows 7 64bit Home Premium Logitech 
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post #10 of 10
Quote:
Originally Posted by ibhso View Post

Well, the problem was with windows updates and service packs. I have reinstalled windows and everything is like it should be now

Just update windows with all the security updates and leave SP1 plus all other updates. This should secure windows and it will offer security protection.
X79-GCN
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Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
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X79-GCN
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CPUMotherboardGraphicsRAM
Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
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