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6600k overclock issue

post #1 of 5
Thread Starter 
Hardware
MB: MSI z170a gaming M3
CPU: Intel i5 6600k
CPU: cooler: Corsair H100iGTX
VGA: MSI GTX 970
Ram: 16 GB 2x8GB G Skill ddr4 (can get exact if needed)
PSU: EVGA SuperNOVA 650 G1 80+ GOLD, 650W Continuous Power, Fully Modular
Storage: 250 PNY CS1211 SSD, 1TB WD Blue HDD, 500 GB Seagate HDD

OS win 10 64bit

Hello, I am a bit new to overclocking and have some questions and I believe I have an issue.

So I have been able to overclock my CPU to 4.7 GHz without changing anything setting except for the clock speed I have not touched the voltage or any other setting except for enabling XMP and setting the ram o run at 3200 MHz.below is a screen cap of my OC settings.





As far as I can tell its running stable I have run prime 95 as well as some other CPU stress testing software, I get no crashes so the PC itself seems to run fine. Now where my issue comes in when I am running the CPU at max with prime 95 it jumps up to 4.7 like it should but does not stay there. it will bounce between 4.66 and 4.7. I tried dialing the OC back a bit but it does the same thing @ 4.5 is will bounce between 4.45 and 4.5.

First, off is this normal or should it run at 4.7 the whole time it's maxed out?
Is this a voltage issue?

Any help would be great. below are two more screen caps show the different clock speed. Both CPU-z and task manager bounce but they both show different



post #2 of 5
That voltage seems a bit high. What are your temperatures? I know every chip is different, but I wouldn't be surprised if you're temperatures are getting high enough to cause thermal throttling at that point. I'm running an i5-6600K @ 4.7GHz on a Gigabyte G1.Sniper Z170 with a Phanteks PH-TC14PE cooler, & I'm stable at 1.37V. Running Prime95, I see temperatures between 76C & 80C. Try setting your voltage manually. Drop it to 1.4V & see if you can still pass in Prime95, & adjust up or down from there as needed. Check your temperatures while you're at it.

Edit: Forgot to mention, my clock speed does fluctuate, but it stays within 5MHz of 4700MHz the entire time Prime95 is running.
Gigabyte Z170
(23 items)
 
 
Brother's Machine
(15 items)
 
CPUMotherboardGraphicsRAM
i5-6600k GIGABYTE G1.Sniper Z170 EVGA GeForce GTX 1070 FTW Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-3000 
Hard DriveHard DriveOptical DriveCooling
Samsung 950 Pro 512GB M.2280 Seagate Barracuda 2TB 3.5" 7200RPM LG WH14NS40 Blu-Ray/DVD/CD Writer Phanteks PH-TC14PE_BL 
CoolingCoolingCoolingCooling
Phanteks PH-F140SP Phanteks PH-F140SP Phanteks PH-F140SP Phanteks PH-F140SP 
CoolingCoolingOSMonitor
Phanteks PH-F140SP Phanteks PH-F120SP Windows 10 Pro Visio E601i-A3 
KeyboardPowerCaseMouse
Logitech K400 EVGA SuperNOVA 750 G2 Phanteks Enthoo Luxe Logitech G600 MMO 
OtherOtherOther
XBox One Controller Reeven Four Eyes Touch HTC Vive 
CPUMotherboardRAMHard Drive
Pentium G4560 ASUS H110M-A/M.2 Corsair Vengeance LPX Western Digital Caviar Blue 
Hard DriveCoolingOSPower
Western Digital Caviar Blue Cryorig H7 Undecided EVGA Supernova G2 750W 
CaseOther
Corsair Air 540 Phanteks PH-F140SP 
CPUMotherboardGraphicsRAM
i3-2120 ACER IPISB-VR EVGA GTX 260 3x2GB DDR3 
Hard DriveOptical DriveOptical DriveCooling
Wester Digital Green ASUS DVD RW DVD RW Stock Cooler 
CoolingCoolingCoolingOS
Noctua NF-S12B Redux-1200 Noctua NF-S12B Redux-1200 Noctua NF-S12B Redux-1200 Windows 10 Pro 
PowerCaseMouse
Thermaltake TR2 500W Corsair Carbide Spec-01 Microsoft Intellimouse 
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Gigabyte Z170
(23 items)
 
 
Brother's Machine
(15 items)
 
CPUMotherboardGraphicsRAM
i5-6600k GIGABYTE G1.Sniper Z170 EVGA GeForce GTX 1070 FTW Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-3000 
Hard DriveHard DriveOptical DriveCooling
Samsung 950 Pro 512GB M.2280 Seagate Barracuda 2TB 3.5" 7200RPM LG WH14NS40 Blu-Ray/DVD/CD Writer Phanteks PH-TC14PE_BL 
CoolingCoolingCoolingCooling
Phanteks PH-F140SP Phanteks PH-F140SP Phanteks PH-F140SP Phanteks PH-F140SP 
CoolingCoolingOSMonitor
Phanteks PH-F140SP Phanteks PH-F120SP Windows 10 Pro Visio E601i-A3 
KeyboardPowerCaseMouse
Logitech K400 EVGA SuperNOVA 750 G2 Phanteks Enthoo Luxe Logitech G600 MMO 
OtherOtherOther
XBox One Controller Reeven Four Eyes Touch HTC Vive 
CPUMotherboardRAMHard Drive
Pentium G4560 ASUS H110M-A/M.2 Corsair Vengeance LPX Western Digital Caviar Blue 
Hard DriveCoolingOSPower
Western Digital Caviar Blue Cryorig H7 Undecided EVGA Supernova G2 750W 
CaseOther
Corsair Air 540 Phanteks PH-F140SP 
CPUMotherboardGraphicsRAM
i3-2120 ACER IPISB-VR EVGA GTX 260 3x2GB DDR3 
Hard DriveOptical DriveOptical DriveCooling
Wester Digital Green ASUS DVD RW DVD RW Stock Cooler 
CoolingCoolingCoolingOS
Noctua NF-S12B Redux-1200 Noctua NF-S12B Redux-1200 Noctua NF-S12B Redux-1200 Windows 10 Pro 
PowerCaseMouse
Thermaltake TR2 500W Corsair Carbide Spec-01 Microsoft Intellimouse 
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post #3 of 5
That voltage is already too high. You are just shortening the lifespan of that CPU by just doing that.

You should not leave the CPU voltage on auto ever if it goes to 1.5V+ like that. Also Task Manager is not a reliable application to read clock speeds in Windows 8 / 8.1 and 10.

You should be monitoring your temperatures. As far as I know in those screenshots, I don't see any hardware temperature monitoring applications open.

The clock speed fluctuation shouldn't be anything to worry about. Use something like RealTemp, CoreTemp, HWinfo64, HWmonitor to monitor the CPU core temperatures.

Here, the Skylake voltage table and flow chart may be of usefulness to you.


Gaming Computer
(19 items)
 
   
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 Asustek P5Q-PRO Nvidia 9800 GTX+ Kingston DDR2 8gb 
Hard DriveOptical DriveCoolingOS
Western Digital 1 TB Pioneer Noctua NH-U9B Windows 7 Ultimate 64-bit 
MonitorKeyboardPowerCase
Dell Monitor Logitech G110 Antec 750W Thermaltake Aluminium Old Case 
MouseMouse PadAudio
Logitech G500 Gaming Mouse Generic Mousepad Soundblaster 5.1 VX 
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Gaming Computer
(19 items)
 
   
CPUMotherboardGraphicsRAM
Intel Core 2 Quad Q6600 Asustek P5Q-PRO Nvidia 9800 GTX+ Kingston DDR2 8gb 
Hard DriveOptical DriveCoolingOS
Western Digital 1 TB Pioneer Noctua NH-U9B Windows 7 Ultimate 64-bit 
MonitorKeyboardPowerCase
Dell Monitor Logitech G110 Antec 750W Thermaltake Aluminium Old Case 
MouseMouse PadAudio
Logitech G500 Gaming Mouse Generic Mousepad Soundblaster 5.1 VX 
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post #4 of 5
This is what happens when you have AUTO voltage , the motherboard doesn't know safe voltage.
Skylake2016
(13 items)
 
  
CPUMotherboardGraphicsRAM
intel i5-6600k 4.62ghz 1.36v adaptive LLC 4 asus z170 pro gaming powercolor 7850 2gb @ 30% OC 8+8gb corsair 2400mhz CL14 
Hard DriveHard DriveCoolingOS
samsung 850 240gb SSD 2 TB seagate HDD Phanteks tc14pe with noctua 140mm 1500rpm middl... win7 x64 
MonitorKeyboardPowerCase
Qnix qx2710 matte 1440p CoolerMaster tenkeyless cherry brown +o-rings EVGA P2 650w platinum ikonik en2 140+140(stock fans from cooler) +1... 
Mouse
Logitech 402 
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Skylake2016
(13 items)
 
  
CPUMotherboardGraphicsRAM
intel i5-6600k 4.62ghz 1.36v adaptive LLC 4 asus z170 pro gaming powercolor 7850 2gb @ 30% OC 8+8gb corsair 2400mhz CL14 
Hard DriveHard DriveCoolingOS
samsung 850 240gb SSD 2 TB seagate HDD Phanteks tc14pe with noctua 140mm 1500rpm middl... win7 x64 
MonitorKeyboardPowerCase
Qnix qx2710 matte 1440p CoolerMaster tenkeyless cherry brown +o-rings EVGA P2 650w platinum ikonik en2 140+140(stock fans from cooler) +1... 
Mouse
Logitech 402 
  hide details  
Reply
post #5 of 5
Dear user, you understand that OC is very dangerous happens on user's own responsibility and MB manufacturer isn't responsible for any auto settings that has been there placed only for user convenience, and is guaranteed to work only when user is running the CPU only within manufacturer's specifications.
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