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My P67 Extreme4 Won't Boot Past 47x?

post #1 of 5
Thread Starter 
I can only seem to get 47 x 100 so far, whenever I hit 48 or higher a BSOD doesn't appear but a flashing "-" with a black background does appear. Does anyone know why this is happening or how to fix it?

Settings so far...
VCORE : 1.450 Fixed
LLC : Level One
Multi : 47
BCLK : 100
DRAM Voltage : 1.5v
post #2 of 5
Try enabling PLL Overvoltage. It can help when trying to boot at higher multis.
Also, you should set the LLC to level 2 or 3. Level 1 will spike the voltage and can cause damage.
The Blender
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k @ 4.5 GHz 1.352v ASRock P67 Extreme4 Sapphire HD 6950 @ 880/1375 G. Skill Ripjaws X 8GB 
Hard DriveOptical DriveOSMonitor
WD Caviar Black 1TB Asus Windows 7 64 bit Asus VW246H 
PowerCase
Corsair TX750 Antec 900 
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The Blender
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k @ 4.5 GHz 1.352v ASRock P67 Extreme4 Sapphire HD 6950 @ 880/1375 G. Skill Ripjaws X 8GB 
Hard DriveOptical DriveOSMonitor
WD Caviar Black 1TB Asus Windows 7 64 bit Asus VW246H 
PowerCase
Corsair TX750 Antec 900 
  hide details  
Reply
post #3 of 5
I have the same mobo, these are my settings for 4.8ghz. Your voltage seems extremely high for 4.7ghz. I'm running @ 1.375 for 4.8ghz.

OC Tweaker Settings


You might need to play with the Load Line Calibration Level and possibly need to turn off Overvoltage. They work differently for each person.

Advanced CPU Configuration Settings

I have success turning off C3 and C6, but you might need to leave them on.

DRAM Settings

Make sure you manually enter your RAM timings. For some reason the AUTO timings are completely wrong.

As I mentioned earlier, there are a few settings that you might have to play with. Overall, you should be able use all of the same settings for a stable overclock @ 4.8Ghz.
post #4 of 5
Thread Starter 
y2jrock60, those settings worked for me except I didn't turn off c3 and c6 and my ram is slightly slower at 1333mhz.
post #5 of 5
Good to hear, +Rep?
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