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i5-760 - OC stable with manual voltage but not auto?

post #1 of 27
Thread Starter 
I've reached 4.0GHz with my i5-760 with 200MHz x 20, and it's perfectly stable with manual Vcore set to 1.275v.

Mobo: ASRock P55 Extreme4
CPU: Core i5-760
RAM: Ripjaws 8GB (2x4GB) 9-9-9-24 1600MHz

Settings:

Vcore: 1.275v
VTT: 1.22v
DRAM: 1.5v
Everything else: Auto
C1E, Speedstep, C-STATE: Disabled

The only thing I'm changing is the Vcore, from 1.275v to Auto. That alone leads to a crash. Definitely not what I was expecting because I'm under the impression Auto Vcore provies too much voltage, not too little.

By the way, I need to use Auto voltage temporarily to determine how much offset I need.
Edited by pnoozi - 5/6/12 at 12:23pm
    
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post #2 of 27
Yes ofcourse, your Vcore should be on manual to achieve that overclock in the first place. just keep it manual and you'll be good to go if you are sure its stable smile.gif
post #3 of 27
Thread Starter 
So Auto does not provide enough voltage? I thought it provided voltage liberally?

And yes it's stable but it does not drop the voltage and speed when idling, so I'm basically running 1.275v and 4.0GHz 24/7.
    
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post #4 of 27
Enable C1E and Speedstep and you'll get downvolting/downclocking. My 4GHz is fully stable with both of them enabled.
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post #5 of 27
Thread Starter 
Quote:
Originally Posted by plum View Post

Enable C1E and Speedstep and you'll get downvolting/downclocking. My 4GHz is fully stable with both of them enabled.

Mine crashes after a few minutes with C1E and/or Speedstep enabled. And it doesn't downvolt or downclock anyway, according to CPU-Z and HWMonitor. Am I doing something wrong? Is there another BIOS setting conflicting with it?
Edited by pnoozi - 5/6/12 at 4:57pm
    
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post #6 of 27
Thread Starter 
I currently have C1E and Speedstep enabled, and I'm idling in Windows with 0% CPU usage, and CPU-Z and HWMonitor report full Vcore and speed. mad.gif
    
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Intel Core i5-760 @ 3.8GHz ASRock P55 Extreme4 XFX Radeon RX 570 4GB G.SKILL Ripjaws X 8GB DDR3-1600 
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Intel Core i5-760 @ 3.8GHz ASRock P55 Extreme4 XFX Radeon RX 570 4GB G.SKILL Ripjaws X 8GB DDR3-1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 840 Pro 256GB SSD Toshiba P300 2TB HDD Lite-On DVD-RW Jonathan Taylor Thomas 
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Windows 10 Pro Acer KG240 Acer KG240 Razer BlackWidow Tournament Edition 
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post #7 of 27
CPU-Z is pretty bad for monitoring, although HWMonitor should show vcore downvolting, I use HWINFO64 to get all my readings as it's the best software.

If you still don't see anything downvolting/downclocking, what happens when you reset it to stock settings?

Make sure your BIOS version is up to date as well.
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post #8 of 27
Thread Starter 
I'll try stock right now.
    
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Intel Core i5-760 @ 3.8GHz ASRock P55 Extreme4 XFX Radeon RX 570 4GB G.SKILL Ripjaws X 8GB DDR3-1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 840 Pro 256GB SSD Toshiba P300 2TB HDD Lite-On DVD-RW Jonathan Taylor Thomas 
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post #9 of 27
Thread Starter 
OK, on stock right now, downvolted to 0.89v and 1.205GHz (133.9MHz x 9) - but I'm not sure what BIOS setting is doing this.
    
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Windows 10 Pro Acer KG240 Acer KG240 Razer BlackWidow Tournament Edition 
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Intel Core i5-760 @ 3.8GHz ASRock P55 Extreme4 XFX Radeon RX 570 4GB G.SKILL Ripjaws X 8GB DDR3-1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 840 Pro 256GB SSD Toshiba P300 2TB HDD Lite-On DVD-RW Jonathan Taylor Thomas 
OSMonitorMonitorKeyboard
Windows 10 Pro Acer KG240 Acer KG240 Razer BlackWidow Tournament Edition 
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post #10 of 27
There may be a setting called "Load Line Calibration". While disabling this is the Intel default, enabling this may let you "firm up" the voltage to allow you to OC more reliably.
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Samsung 850 EVO SSD Samsung DVD/CD-writer Corsair Hydro H60 Windows 7 
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RAMHard DriveOSMonitor
Kingston ValueRAM DDR3-1333 WD Caviar Blue Windows 7 64-bit Sony 32" TV set 
Case
Apex TX-381 
CPUGraphicsRAMHard Drive
Core i5 430M GT230M (1 Gb dedicated) 8 GB DDR3-1066 640 GB 
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