Overclock.net › Forums › Intel › Intel - General › Overclocking i7 2600k
New Posts  All Forums:Forum Nav:

Overclocking i7 2600k

post #1 of 15
Thread Starter 
I have a GA-Z68XP-UD5 motherboard with a NH-D14 cooler.

The highest I have successfully been able to run prime95 with voltage set to AUTO is 4.28GHz at 42x. The lowest manual voltage I have been able to run with 4.28GHz is 1.4v - this seems a little high, though cpuz claims that the voltage is almost always at 1.28v. The temperature stays under 70C.

I am confused why I cannot run easily at 4.2GHz when I see others running at 5GHz with air cooling.

Is my situation normal? How can I overclock more effectively? Any help would be very much appreciated!
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
post #2 of 15
How are you overclocking it? Did you use any of the "auto-overclock" feature of the BIOS or software? What kind of speed are you looking for? I'm guess you meant you had 4.28GHz at 1.42V?

If you want something moderate, like 4.4, you should be able to reset the BIOS optimized defaults, and then just change the Turbo Multipliers or CPU Ratio to 44, while leaving everything else on Auto. Then do some testing with Prime95 to see what the CPU voltage board is delivering, should be around 1.375~1.4V, and what the temps are. As long as the voltage is under 1.4 and the temps are under 80C, you are good to go. If the board is delivering crazy high voltages you'll need to do some more manual tweaking, but most motherboards can handle 4.4 in Auto.
post #3 of 15
Thread Starter 
I have been able to do 42x with AUTO, but not 45x.

What would the steps for overclocking be if I wanted say 4.8GHz? Is it possible with my chip and cooler?

I am confused why cpuz states the voltage is 1.2_ for 42x with AUTO when I cannot manually set the voltage to 1.3v and get working results.
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
post #4 of 15
If you want to try for something like 48, I'd recommend you read the Sandy overclocking guide in the Intel CPU section, it has pretty good coverage of what you'd need for that speed. But, in short, you'd need to set a pretty high Vcore (probably 1.45), you'd need to set a high setting for Loadline Calibration (probably Ultra High), and you'd need to enable Internal PLL Overvoltage.

When you were trying 1.3V for 42 manually, dod you change any other settings? In Auto the board is likely managing the loadline calibration (which controls voltage drop under load) and so might be providing a more stable voltage than your manual 1.3V setting. So in Auto the load delivered voltage may have been 1.28V, but your manual setting may have only been delivering 1.25V under load.
post #5 of 15
Thread Starter 
I can't seem to raise the base clock above 102.0 MHz without booting issues. I also cannot boot now with a 44x multiplier.

Prime95 seems to be running okay with 42x and 1.4v. The max temp is 73C after a few hours. Maybe I should just stick to 4.28 GHz? I don't see how higher is even possible with my cooler, even though people have claimed they have done it.
Edited by spooky655 - 3/26/13 at 11:47am
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
post #6 of 15
It's best to just leave the BCLK at 100. The 2% gain isn't worth it.
post #7 of 15
Thread Starter 
How did you overclock so high with air cooling? What are your temperatures?
Edited by spooky655 - 3/26/13 at 10:14am
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
post #8 of 15
I got lucky with a good chip. I was 4.8 @ 1.4V with temps in the high-70s to low-80s, but I can run 4.6 @ 1.36 with temps in the low-70s, and I didn't see any performance difference, so I backed it down and I'm running that right now.
post #9 of 15
Thread Starter 
Do you think my cooler was really worth it? What could I run at with the stock cooler?
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
2011 Rig
(8 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K @ 4.5 Gigabyte Z68XP-UD5-B3 EVGA Geforce GTX 560 Ti Corsair XMS3 Classic 8GB 1600MHz 
Hard DriveCoolingPowerCase
Samsung Spinpoint F3 7200RPM Noctua NH-D14 CPU Cooler SeaSonic X Series X650 Gold Lian Li Lancool PC-K62 (Steel/Plastic) 
  hide details  
Reply
post #10 of 15
You can't do much overclocking at all on the stock cooler. But you need to work on your overclock some more, I'm sure you can do better than 42 at 1.4V, you should be able to hit 4.5 on that voltage at least.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel - General
Overclock.net › Forums › Intel › Intel - General › Overclocking i7 2600k