G41C-GS CPU multiplier "locked"

Wazawaza

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Jul 13, 2014
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Greetings, how is everyone?

I am facing a little problem and would like your advice on the matter, if possible.
I had a G41M-GS3 who suddenly had problems while booting, having to try many times to turn the PC on before it actually booted. Of course one day it didn't boot anymore, I removed the ram: no beep; removed the graphics card: again no beep. I assumed the motherboard was "broken" (the fans worked properly).
Having some programs and files I needed to access (and not a lot of money), I decided to buy a G41C-GS so I could change the motherboard without having to format the HDD (I know it was a bad decision now).
I had my Q6600 overclocked at 312 Mhz, turning the processor from 2.4 ghz to 2.8ghz (I used this configuration for 2 years).
I replaced the motherboard, did a clear CMOS, inserted a new battery, turned the pc on and everything looked fine again. The first day I didn't care much because I was so happy to have my PC working again, but the second one I looked at things with more detail.
In the BIOS menu, I noticed the CPU multiplier is locked at 6 (it should go up to 9) and the OC settings simply don't respond when I press Enter.
I tested with OC Tuner and I could multiply the CPU by 9, selected a 312 Mhz fsb, but OCCT stopped the stress test, saying an error had been detected at core #2 (CPU temps never went over 56ºC). I tried again with 309 Mhz and had the same problem, which did not occur at 305. I didn't touch the voltage.
Something is on my mind, I didn't touch the drivers, the ones for the G41M-GS3 are the ones installed, could this be causing a conflict?


My configuration is:
mobo: G41C-GS
CPU: core2 quad Q6600 2.4 ghz (kentsfield)
CPU cooling: Master cooler tx3
Ram: Kingston DDR3 2x4 gb 1600 CL9 (max. bandwith: 667 Mhz)
Graphics: Sapphyre AMD Radeon HD 6950 1 gb
PSU: Antec eco 620W

Hope this message finds you well and thank you for reading,
Cheers
 

InvalidError

Titan
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The weakest link dictates what the maximum OC can be. Your "problem" could be as simple as your new motherboard having slightly different electrical characteristics that are just enough to prevent you from getting the same OC you could get before.

Another possibility is that your CPU may have been slightly damaged when your previous motherboard failed.
 

Wazawaza

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Jul 13, 2014
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Thank you for your swift reply, I appreciate it.
The idea of my processor being damaged has occured to me, I am still hoping it's not the case (CPU is 7 years old though). Are you implying that the mobo "locks" itself for CPU security reasons?
My first concern is not of overclocking to the previous settings, but first to put where they should be (multiplier at 9, giving 2.4ghz instead of the 1.6ghz I have now :S ).
By the way, I haven't seen anything physically wrong with the previous mobo (something like burnt parts or anything else that could look suspicious).
Nevertheless, thank you for your time and opinion :)
 

InvalidError

Titan
Moderator
The BIOS not allowing you to change the multiplier could simply be a bug - might need an update.

As for something being physically wrong with your old motherboard, the CPU's voltage regulator is a simple buck converter operating off the 12V rail. The only things standing between 12V supply and your ~1.5V CPU is a MOSFET and an inductor. It takes a very tiny VRM malfunction to momentarily spike the CPU with a lot more than the ~1.5V it was designed for and such a momentary malfunction would be unlikely to leave any traces behind since the PSU should shut down before current gets high enough for that to happen.

This is a bit like ESD: rarely leaves any physical evidence behind that could be detected by the naked eye even if you knew where to look for it.
 

Wazawaza

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Jul 13, 2014
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I believe updating the BIOS should be my the next step, but here I find a new problem: I have never performed a BIOS update and I read it may cause damage to the PC, fear is over my head. I am learning about pc's as I go and try to adapt to the situations as they come.
I will check out how it'ss done and will post the result, if I do it.
Cheers ^^
 

InvalidError

Titan
Moderator
You usually have 2-3 options for updating BIOS:
1- DOS-based flash utilities
2- Windows-based flash utilites
3- BIOS option to update it from a USB key

If you update the BIOS from Windows and Windows crashes, it is possible that it might 'brick' your motherboard. I have not checked your board's documentation but many semi-modern boards have a recovery bootloader or dual-BIOS arrangement that allows updating the BIOS from a USB key to recover from a bricked main BIOS.

Some newer motherboards even have an USB2 microcontroller that can independently read a BIOS file from a USB key connected to it and update the BIOS even without a CPU installed, making the board nearly unbrickable.
 

Wazawaza

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Jul 13, 2014
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Well, I have bad news (for me at least): my PC won't boot again...
I believe your first assumption was right, that the CPU was damaged (it would explain the Core#2 error detected by OCCT).
Seems like I should have 2 mobos in good shape, but a bad CPU, it was a hasty and bad decision, should have come here 1 month ago. I will try an old dual core I have, to see if the problem remains.
Cheers
 

Wazawaza

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Jul 13, 2014
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Thank you :)
I already installed it and it seems to be working fine, but it's a pentium D915 dual core :(
I don't think this one is overclockable (multiplier is at x14, but fsb is of 200Mhz), still I am doing some research about it.