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Clearing CMOS

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  • Motherboards
  • CMOS
Last response: in Motherboards
June 14, 2012 2:23:22 AM

What does it do? Is it recommended to do?

More about : clearing cmos

a c 331 V Motherboard
June 14, 2012 9:04:49 AM

When u have a certain problem, it can help.

When a new CPU is available, new BIOS may be released for better compatibility.

Also new RAM compatibility can be added.

If u have no problems with your HW, don't flash, it can disable your mobo,

if u do it the wrong way.

If u flash the wrong version.

......
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a c 331 V Motherboard
June 14, 2012 9:06:18 AM

Examples when to flash the BIOS usually are:

1. New CPU was released
2. Memory compatibility issues + new RAM models are released
3. Remember when the new 2+TB HDD have been released? New BIOS was needed.
4. New hardware support added.
5. Or if u can benefit from changes in the change log.

BIOS updates are always risky for various reasons
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a b V Motherboard
June 14, 2012 9:29:28 AM

Clearing CMOS would clear up any settings you made in the BIOS and the system will prompt you to either load the default settings or set it yourself again. Eitherway, you won't be able to boot up unless you've done one of them. This function is usually used for troubleshooting.
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June 14, 2012 9:30:58 AM

Useful info, but he's asking about clearing the CMOS rather than flashing it.

If the PC has trouble booting, clearing the CMOS will reset the BIOS to default values, often allowing the PC to boot. For example, if the PC is overclocked to the point where it freezes during booting, clearing the CMOS will set the clock speeds back to defaults.

There's usually three ways you can do it depending on what's available on the motherboard:
1) connect 2 specific pins on the motherboard with a jumper
2) remove the CMOS battery for several minutes
3) press the Clear CMOS button on the motherboard.

However there's no reason to clear it unless necessary due to boot failure.
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June 14, 2012 11:28:15 PM

Thank you for your reply, So its only a troubleshooting thing, I thought it was something that you had to do or something like that. Thank you for clearing that up

Khalan said:
Useful info, but he's asking about clearing the CMOS rather than flashing it.

If the PC has trouble booting, clearing the CMOS will reset the BIOS to default values, often allowing the PC to boot. For example, if the PC is overclocked to the point where it freezes during booting, clearing the CMOS will set the clock speeds back to defaults.

There's usually three ways you can do it depending on what's available on the motherboard:
1) connect 2 specific pins on the motherboard with a jumper
2) remove the CMOS battery for several minutes
3) press the Clear CMOS button on the motherboard.

However there's no reason to clear it unless necessary due to boot failure.

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