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Thread: CMOS checksum error




  1. #1
    Join Date
    Oct 2004
    Location
    Jämtland, Sweden
    Posts
    128

    Default CMOS checksum error

    Can a CMOS checksum error occur by itself? Yesterday, when I shut down the PC, all was working fine. I hadn't been tampering with anything at that time. Today, however, when I turned on my comp, it was acting strangely.. "it said CMOS checksum error" in the POST screen, and that it would revert to defaults, but it never did. It wouldn't boot, and I could barely enter the BIOS. And the bios version seemed to have changed from F8 to F4. Maybe the backup BIOS took over? I'm not sure.. There were some items missing in the BIOS as well. Anyway, I cleared the CMOS, and now everything is working fine. But still, it feels like things like this shouldn't happen all by themselves... Could it be some BIOS virus or something?

    Chieftec Bravo LBX01-B-B-SL
    580 W Hiper Type-R PSU

    Gigabyte GA-K8NXP-9 S.939
    AMD Athlon 64 Venice 3000+ at ~2470 MHz
    OCZ Gold EL PC 3700 Ram, 2.5-3-3-8 at ~456 MHz,
    2x512 MiB
    Gigabyte SilentPipe X800XL, 400/490 MHz
    Auzentech Digital X-Mystique 7.1CH DDL-RCE
    Logitech Z-5500 5.1 speakers
    1 x WD Caviar 8 MiB cache 1600JS-00MHB0 160GiB SATA-2
    3 x WD Caviar SE 16 MiB cache 2500KS-00MJBQ 250GiB SATA-2



  2. #2
    Join Date
    Apr 2005
    Location
    Ontario, Canada
    Posts
    1,364

    Default Re: CMOS checksum error

    Dead CMOS battery possibly?
    GIgabyte GA-990FXA-UD3
    AMD FX8120 @ 4GHz
    Patriot 1866MHz EL series 2X4GB DDR3
    Powercolour HD 6970 2GB w/XFX 8800GT 512MB Hybrid PhysX
    Creative X-FI titanium HD w/Technics class A 300W amp and tower speakers
    PC P&C 500W PSU
    2TB Seagate
    Coolermaster 690II w/Corsair H100 tucked under the hood

  3. #3
    Join Date
    Oct 2004
    Location
    Jämtland, Sweden
    Posts
    128

    Default Re: CMOS checksum error

    I don't think it's the battery.. I bought this pc a few months ago.

    Chieftec Bravo LBX01-B-B-SL
    580 W Hiper Type-R PSU

    Gigabyte GA-K8NXP-9 S.939
    AMD Athlon 64 Venice 3000+ at ~2470 MHz
    OCZ Gold EL PC 3700 Ram, 2.5-3-3-8 at ~456 MHz,
    2x512 MiB
    Gigabyte SilentPipe X800XL, 400/490 MHz
    Auzentech Digital X-Mystique 7.1CH DDL-RCE
    Logitech Z-5500 5.1 speakers
    1 x WD Caviar 8 MiB cache 1600JS-00MHB0 160GiB SATA-2
    3 x WD Caviar SE 16 MiB cache 2500KS-00MJBQ 250GiB SATA-2



  4. #4
    Join Date
    Apr 2005
    Location
    Ontario, Canada
    Posts
    1,364

    Default Re: CMOS checksum error

    I would test it with a Multi Meter anyways. Sure sounds like that kind of issue. THe only other thing I can think of is maybe the bios could need updating? Or there could be a failing part like the memory, CPU or motherboard. Checksum error almost always occurs when there is a major hardware change and the bios settings are in conflict. Is it a homebuilt or a name brand PC? Give some system details.
    GIgabyte GA-990FXA-UD3
    AMD FX8120 @ 4GHz
    Patriot 1866MHz EL series 2X4GB DDR3
    Powercolour HD 6970 2GB w/XFX 8800GT 512MB Hybrid PhysX
    Creative X-FI titanium HD w/Technics class A 300W amp and tower speakers
    PC P&C 500W PSU
    2TB Seagate
    Coolermaster 690II w/Corsair H100 tucked under the hood

  5. #5
    Join Date
    Oct 2004
    Location
    Jämtland, Sweden
    Posts
    128

    Default Re: CMOS checksum error

    I built the rig myself, and it has ben working flawlessly ever since I did (that is, until a few days ago;-)
    My specs:

    Mobo: Gigabyte GA-K8NXP-9 nf4 U
    CPU: Athlon 64 3000+ Venice
    Ram: OCZ Gold 2x512 mb PC 3700 EL
    Graphics: Gigabyte GV-RX80L256V X800XL 256 MB 256 bit Silent Pipe
    HDD: WD 160 GB SATA II

    As for the BIOS, it's up to-date.

    Chieftec Bravo LBX01-B-B-SL
    580 W Hiper Type-R PSU

    Gigabyte GA-K8NXP-9 S.939
    AMD Athlon 64 Venice 3000+ at ~2470 MHz
    OCZ Gold EL PC 3700 Ram, 2.5-3-3-8 at ~456 MHz,
    2x512 MiB
    Gigabyte SilentPipe X800XL, 400/490 MHz
    Auzentech Digital X-Mystique 7.1CH DDL-RCE
    Logitech Z-5500 5.1 speakers
    1 x WD Caviar 8 MiB cache 1600JS-00MHB0 160GiB SATA-2
    3 x WD Caviar SE 16 MiB cache 2500KS-00MJBQ 250GiB SATA-2



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