Question about Intel ASRock Penryn1600SLI-110dB LGA 775 NVIDIA nForce 650i SLI ATX Motherboard

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Penryn1600sli-110db CMOS CHECKSUM BAD ERROR

I have recently updated the bios keep in mind this problem was existing on my old 1.20 ver bios and now everytime I restart it gives me two options.
press F2 to go to setup
press F1 to load default settings

Also, when I do load optimal default settings in the bios, it triggers a shutdown from the cpu temp going to high. But when I choose to press F1 option to load defaults. The temperature sits between 40 and 41c and stables as long as I keep pressing F1 when boot up. I have been watching the temp status through Asrocks OC tuner ( but dare not touch the OC settings). Added hardware, besides what is set to be recognized in the bios default, is obviously not showing when it does boot up. Getting games to play is a obsolete as it wont work longer then five minutes before shutting down the computer. Primarily because the default setting is saying my primary video bus is PCI instead of PCIE.
So I'v taken steps but need some advice.
I have cleared the cmos from jumper 1 and 2 to 2 and 3 for five seconds. then put it back. Nothing new happend

Should I maybe remove the cmos battery in series of jumping the 2 and 3 pins? and if so, how long?

I'm beginning to think the CMOS battery is dead because I had this tower unpluged for over 6 months straight and replaced the PSU. This board was also sitting in a warhouse for who knows how long.
My system is as follows:
Penryn1600sli-110db Motherboard
Intel Core 2 Quad Kentsfield 2.4 Ghz Q6600 LGA 775
2 1 Gig of DDR2 RAM 667 pc 5200
Foxconn Gforce 8600 gts oc700/2200
Sumsung 200 gig Sata HD
DVD Multi recorder RW

If you need more info I can provide it. Thanks in advance!!

Posted by on

  • sethllz Dec 19, 2008

    I have four 80 mm fans and 2 w/ intake 2 exhaust and one of the exhaust fans is directly on top of my well vented atx case. Up until now i have never experienced this problem, but like i said, it has also been in my closet for 6 months. Its def a bios glitch that raises the temp & after reboot, using f1 option, a stable 40 c is read on the oc tuner. Keep in mind that I did not allow time for cpu to cool, thus making it fact that is was a bios glitch that triggered the auto shut down feature. Thanks for the input!


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I would replace the battery as the 1st thing, however I would also change your cpu fan for a new one and reseat the processor. Also get some decent cpu paste and make sure this is applied properly, and dont forget to wipe the old stuff off!

Does your case have anywhere were you can place some fans? It sound slike you have two problems to me, the battery being one and the overheating the second

Posted on Dec 19, 2008

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Your BIOS has Been Updated (either by you or possibly a virus): If your BIOS has been updated recently, your CMOS settings may have become reset. Make sure that the values entered in the BIOS are correct or simply reset them to the default settings. If you believe that a virus updated your BIOS settings, run a virus scan and make sure that the BIOS settings are back to the default.
The Computer Was Shut Down Improperly: Sometimes when running MS Windows, if you shut down your laptop or desktop without first properly shutting down your operating system it will corrupt the CMOS settings causing the CMOS Checksum Bad Error. You can easily avoid this error by making sure that you completely shut down your computer before turning off the power. Usually this entails going into the Start Menu/ Turn Off Computer/ Shut Down. If you received the error, shut down the computer properly, if this is the cause of the error, the error message will not return.

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