set bios defaults.
download lastest bios for ud4:
http://www.fileden.com/files/2009/12...p67aud4.7f.zip
flash bios using @bios in windows (dont forgat uncheck checboxes, or program crash)
boot windows with new bios then shut down comp.
connect a ps/2 keyboard.
push power button then push alt button on keyboard dont drop button and spam to F12 button.
bios will ask you: flash backup bios with your main bios. flash it
and your bios will never come back to f3.
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are you sure about you cpu can hit 5.3ghz+ ? used same cpu on asus board?