I did a test, enabled 150 mode useing opt1 jumpered 5 + 6 pins, and that seems to have done the trick, but why, my system suposed to suport 3G

I checked asus for bios updates, there are a few to fix temp sensors and fan speed adjustments, no mention of SATA.

Power sometimes cuts out here, I guess I could use the bios Anti crash thing or something but im always woryed when it comes to bios flashing, any thoughts...