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Overclock failing occasionally on restart / cold start but stable in OS?

post #1 of 9
Thread Starter 
I'm having problems with restarts and occasionally cold starts.

At 3.6 it is almost problem free but when I push to 3.8 I get problems with starting or restarting. After a few days of care free computing, if I have to do a lot of restarting and switching between OS's it may not power up properly (blank black screen) then, when I restart I get the "Overclock failed f1,f2" screen.


For settings I have tried boosting the CPU voltage to 1.32: no effect
Having most of the settings on auto mode: no effect
Turbo mode on or off: no effect
Load line calibration on or off: no effect
Various odd BCLK frequencies around the 3.8 area (189,190,191,193):no effect


What steps would you take from here to remedy the situation? I believe the processor will go higher under decent heat temps but why the restart problems?
Edited by Tom_Tom - 2/19/12 at 9:10pm
post #2 of 9
Did you try enabling internal PLL OverVoltage. that can fix alot of coolboot problems.
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Gaming Rig
(18 items)
 
   
CPUMotherboardGraphicsRAM
Intel i5-2500k @ 4.6 GHZ ASUS P8Z77-V PRO XFX AMD 6970 2GB CORSAIR VENGENCE DDR3 16 GB 1600mhz 9 9 9 24-2R 
Hard DriveHard DriveHard DriveOptical Drive
Western Digital 7200 rpm 500 gb (Storage)  CRUCIAL M4 64 GB SSD SATA III (Boot Drive) External 1 TB Western Digital HDD ASUS DVD-RW 
CoolingOSMonitorKeyboard
ZALMAN CNPS9900MAX Windows 7 Ultimate 64 Bit Acer 1920 x 1080 23 inch Razer BlackWidow 2013 Ultimate Mechanical keybo... 
PowerCaseMouseMouse Pad
CORSAIR 650 Watt ANTEC 900 Razer NAGA Razer Kabuto 
AudioOther
Logitech G930 and some speakers. USB Drives Oh and a surge protector to prevent ... 
CPUMotherboardGraphicsRAM
Intel Celeron Dual Core G530 @ 2423 MHZ ASUS P8Z68-V PRO EVGA 550 Ti G.SKILL Ripjaws Series 4GB DDR3 1600 MHZ 9-9-9-24 
Hard DriveOptical DriveCoolingOS
250 GB 7200 RPM Western Digital LG DVD RW You don't wanna know. Win 7 64 
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19 inch dell 1280 x 1024  
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post #3 of 9
Thread Starter 
Quote:
Originally Posted by pent View Post

Did you try enabling internal PLL OverVoltage. that can fix alot of coolboot problems.

I just did some tests raising the CPU PLL Voltage from 1.80 to 1.90 with no difference in results.

I'm a little apprehensive to raise it higher without fully understanding how the Loop voltage could effect the rest of the system.
post #4 of 9
sounds like NB undervolted maybe?! or maybe rising ram latency a little bit would help? GL..
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post #5 of 9
Thread Starter 
Thanks for the suggestion Smex,

It is my understanding that for North Bridge Voltage the 3 settings I should increase would be:

IOH Voltage (NB) [1.10]
IOH PCIE Voltage (NB)[1.50]


IOH PCIE Voltage (NB) [1.50]


Please correct me if I'm wrong.



The Asus P6T se Manual suggests a safe voltage increase of about + 0.10Volts per setting. I'm ready to try that but wondering will the mobo heat up and require good air flow. Right now I have a bit of birds's nest inside the case until my new case (zalman z9) arrives in the mail and I start doing some quality cable management.
post #6 of 9
Hiho..
afaik you just need to increase one of them, which is directed to the fsb. The pcie stuff should not be touched.
i am not sure. Google or search ocn for your board. There should be the key.
I raised mine from 1.1 i think to 1.48 for almost 490 fsb on a p45 chipset.
yours could be similar but better check this before messing around with it.
hope this helped, GL..
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post #7 of 9
Thread Starter 
Quote:
Originally Posted by smex View Post

Hiho..
afaik you just need to increase one of them, which is directed to the fsb. The pcie stuff should not be touched.
i am not sure. Google or search ocn for your board. There should be the key.
I raised mine from 1.1 i think to 1.48 for almost 490 fsb on a p45 chipset.
yours could be similar but better check this before messing around with it.
hope this helped, GL..

Thanks It seems to be working, it's slow process as the failed restarts or cold starts are sporadic. But now I get occasional false starts (no graphics but fans running) but when I restart it runs fine. I'm up to 3.75 and will be reaching for more soon.
post #8 of 9
maybe you can post all the necessary bios settings?!

question.. are the blackbootscreens comming by random or any time you tried to change your oc (even downwards) or any bios setting ?!
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post #9 of 9
Thread Starter 
Quote:
Originally Posted by smex View Post

maybe you can post all the necessary bios settings?!
question.. are the blackbootscreens comming by random or any time you tried to change your oc (even downwards) or any bios setting ?!

The Black boots are coming only when over 3.5 ghz. and usually if I just hit the reset button it boots up properly.



Here are the bios BIOS Settings:


Ai Overclock Tuner - Manual
CPU Ratio Setting - 19
Intel (R) SpeedStep (TM) Tech - Enabled
Intel (R) Turbo Mode Tech - Disabled
BCLK Frequency - 197
PCIE Frequency - 100
DRAM Frequency - 1149 MHz


DRAM CAS# Latency - 7
DRAM RAS# to CAS# Delay - 7
DRAM RAS# PRE Time - 7
DRAM RAS# ACT Time - 21

CPU Voltage 1.225v
CPU PLL Voltage - 1.80
QPI/DRAM Voltage - 1.20
IOH Voltage - 1.18
IOH PCIE Voltage - 1.50
ICH Voltage - 1.10
ICH PCIE Voltage - 1.50

DRAM Bus Voltage - 1.5v
DRAM DATA REF Voltage on CHA - 0.5
DRAM CTRL REF Voltage on CHA - 0.5
DRAM DATA REF Voltage on CHB - 0.5
DRAM CTRL REF Voltage on CHB - 0.5
DRAM DATA REF Voltage on CHC - 0.5
DRAM CTRL REF Voltage on CHC - 0.5


Load-Line Calibration - Disbled
CPU Differential Amplitude - Auto
CPU Clock Skew - Normal
CPU Spread Spectrum - Auto
IOH Clock Skew - Normal
PCIE Spread Spectrum - Auto
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