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ASUS X79 Rampage IV Extreme 2011/ Intel 3930K Overclock

post #1 of 8
Thread Starter 
ComputerSpecs4.0Ghz.png 3747k .png file

My computer is fine, although currently it is overclocked at 4.0GHz from 3.8 Turbo with a CPU Vcore of 1.200Volts. I have not had any problems in any games although I never stress tested it. Looking to bring it up to 4.2GHz, what should I change my CPU VCore voltage too? 1.200Volts to what? I am unsure. It goes in increments of 0.005 I think. I tried running 4.2Ghz at 1.200Volts and it blue screened 45 seconds into LinX benchmark. Also I seem to be having an issue. No matter what I do, If I change and run my 3930K at 4.0GHz in the BIOS it says in CPU-Z while in Windows that it's running at 4011.95??? Why. Is there something wrong here, or that needs to be changed? Shouldn't it be running at exactly 4.0Ghz? Any help and insight, much appreciated.
post #2 of 8
Stay under 1.375V at all times for 24/7 use and you'll be fine. Try 4.2 GHz at 1.25V, and that 4011.95 mhz is fine. It's normal like that. You'll need to experiment with what cpu voltage you need in order for it to be stable. Could even need more or less voltage for it to be stable.
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post #3 of 8
Thread Starter 
Is 1.25V the next lowest voltage I can go too? Whats the max temp any one core should reach? 65C, 70C, other?
post #4 of 8
Increments to Vcore are 0.005v, so from 1.200 you can go to 1.205v and so on. For 4.2Ghz maybe 1.23v is a good start point.
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post #5 of 8
Thread Starter 
Whats the reason it goes to 4011.95?
post #6 of 8
Probably CPU Spread spectrum causing the Base Clock to vary slightly at bootup. Nothing unusual,
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Hard DriveHard DriveCoolingOS
Toshiba DT01ACA300 Intel X25-M 160GB RAID0 Noctua NH-U14S Windows 10 Pro x64 
MonitorPowerCaseAudio
Pioneer PDP4280XD Corsair RM650x Fractal Node 304 B&W 602S2's, B&W M1 Surround, Arendal Sub1 
Audio
Yamaha RX-A1010 
CPUMotherboardRAMHard Drive
i7 3770 4.38Ghz 1.12v Asus P8Z77-I DELUXE Kingston HyperX FURY Series 16GB (2x 8GB) 2200M... Crucial M4 128GB 
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post #7 of 8
Thread Starter 
I disabled both spread spectrums. Will try 1.23volts.
post #8 of 8
You 'can' go over 1.4 volts, just make sure your cooling is good. I wouldn't run it blazing 24/7 at those volts though. That said, your temps are already warm. I would personally push for 4.5.

You're always going to have some 'small' deviation in clock speed. I wouldn't worry about something so minute.
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