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NF4 Ultra-D "CMOS Checksum Error" ???

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I just got this new motherboad by Geforce GTX 7800 yesterfday. Everytime I boot up, I either get blank screen or normal boot screen except it shows up CMOS Checksum Error.. If I try to load bios default + change date at that point, once I do save and restart.. well.. it doesn't even restart, it just goes blank screen.


IF I try to ignore the error and proceed to boot windows, it'll go blank before window loading screen.


I suspect I have a defective mobo. But maybe I am just dumb and I seek wisdom from you sages.



P.S. No SLI here, 535W Engermax PSU,

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