Weird behaviour - due to OC?

Doc Rob

Doc Rob

Doc Rob

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Joined
11 Oct 2005
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139
I've been beginning to experiment with a mild OC of my i7 920. (Having first sorted out my cooling problem with a new case and CPU cooler!)

My bclock is currently 160, with a multiplier of 21, for a speed of 3.36GHz. vCore is set at 1.15V. This seems stable at present. prime95 is running with temps in the mid 50s.

What is odd is that it takes two attempts to start the PC. The first time I press the power button, there is a fan sound which then stops after a second or so, but the PC doesn't boot. To do this takes a second press.

I have had a couple of crashes and one or two BSOD episodes on booting up, but none whilst the PC is running.

Is my voltage too low? I may try upping it slightly, but it seemed an odd problem for this to cause.

EDIT: Checked the vCore, I had it set to 1.15 not 1.1. Have upped it one notch anyway to see what happens.
 
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Happened again just now...

I have a Corsair 650W PSU.

Haven't tried to revert to stock yet, will try it this weekend and see.
 
What happens if you don't press the power button again? Does the machine stay off, as some boards start then restart with the overclock in place.

My Gigbayte x58 UD5 did this with a older BIOS.
 
Interesting - I'll just leave it next time and see if it restarts. I am using almost the same MB as you - a Gigabyte EX58-UD3R, so perhaps that's the issue here.
 
Some motherboards do a sort of dual boot if the system is overclocked.

You press the power button, the system starts for a second or two, the system then switches off for a few seconds and then starts normally.
 
RJC & Surveyor - you are both correct. If left alone, the PC powers itself back up after 4 or 5 seconds. I just never noticed because I was impatiently pressing the power button again!

Thanks for the help. Next part of the plan is up to 3.8GHz...
 
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