Discuss: asus rampage iv extreme randomly boot fail (f1) (Need Help)

PC Spec :

Asus rampage 4 extreme + 3820 (oc 37 x 125) 4625mhz

CORSAIR AX850,

NVidia 780,

2xsamsung pro 840 ssd (raid-0) + 1 2tb hdd,

4 x 4gb 1600 Kingston ram (running at 1333)

Window 7 home premium

(water cooling on cpu, gpu & mb)



Recently my pc was having problem in boot up (f1) showing cpu fan error in the morning. I have running my setting w/o any error for pass few month and it happen only this week. Updated to latest bios still the same. Sometime it boot successfully and only in the morning when I boot up it shown the error (cpu fan error) (f1). when I on at night after work no problem at all. is it cold boot error? please help on this. Thanks..

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