tomshane

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Hello,

For few years I've been running my CPU (E6600) overclocked from 2.40GHz (266x9) to 3.0GHz (333x9) and later to 3.2GHz (400x8) without any problems. Today I noticed computer starts with default values (266x9), so I entered BIOS and re-entered all values like before, but the computer keeps starting in default frequencies.

I'm simply not able to overclock it to any of the previous settings. I don't know what went wrong, maybe MB or CPU is trying to tell me they had enough and are about to say me g'bye? Any suggestions, please? Thanks.

-Ryann
 

tomshane

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I have set the correct multiplier for memory, of course, so it runs on acceptable speeds. The only thing I don't understand and wonder about is with the identical settings it doesn't run since today.
 

tomshane

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After overclocking my memory runs on 800MHz (I have set the correct ratio), so this is not an issue. In my first post I've written, I was running overclocked CPU for over a year with no problem and now it doesn't want to work anymore. Without any change to HW or settings. It posts only with default speeds.
 

tomshane

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This settings always worked:

bios.jpg
 

djbrad007

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Hi,

1. You cpu may have degraded to the point where it cannot even run at stock settings.
2. Problem with ram : Run memtest
3. Motherboard problem

Regards,

Brad
 

foxdie_01

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May 22, 2009
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I have exactly the same problem. And i have exactly the same bios. Running my Q6600 at 8 x 400 (3.2ghz). Turned it on the other day and it dropped my clock to 266. I cant change the clock speed, however i can adjust the mutlipier so its running back to stock (2.4). It will not save any other setting :(

I use my PC once a fortnight for about 4 hours (total time running OC about 100hours). i cant imagine the CPU would have degraded that quickly.

My topic is here:

http://www.tomshardware.co.uk/forum/page-252416_11_0.html
 

tomshane

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Yea that looks the same like my problem. However, I know for sure the values are saved. Because after reboot it tries to use the overclocked settings and it fails, so it reboots few times over and then MB automatically disables the changed settings, so only FSB multiplier is used.
 

hundredislandsboy

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Sounds like classic case of CPU degradation. You've overclocked that bus speed 50% a few years means you've certainly got excellent value and use, might be time to run only stock settings.

The only other thing I could think of why the BIOS settings won't stick is the CMOS motherboard battery is dying. It's uncommon but can happen after several years.

Let us know if you find a solution to get back to your previous overclock settings.