I kinda want to update this procedure, because i have one that so far ALWAYS works in the long run (less than 30min)
1. Try rebooting the system and hold down the Insert key the second the front panel power LED flashes. Try this 3-5 times. If it works the system will boot if not go to the next step
2. power down the system, pull the plug or switch off the PSU so there are no LED's on.
3. Set the CMOS clear jumper to Clear.
4. Pull the battery. As well as the memory you have in the system.
5. Take a stick of memory that you know can boot at low voltage and put it into the #2 slot, its the orange one closest to the top.
6. Set the CMOS jumper to default, and replace the battery. Turn on the PSU or plug it back in.
7. HOLD DOWN THE INSERT KEY and power the system up. You may need to reboot 3-5 times with the insert key down to get it to boot.
8. Once in the bios load the optimized defaults, save and exit.
9. Boot to the bios, now set the memory voltage up to 3.0v, save and power down.
10. replace the non booting memory WITH OUT DISCONNECTING THE PSU!
11. Boot to the bios, you may have to reboot 3-5 times holding down the insert key.
12. Set up your bios DO NOT ADJUST MEMORY VOLTAGE YET! save and reboot.
13. Boot into the bios, now up your memory voltage .10v at a time, save and repeat until you reach your target voltage.
K your done, you might want to memtest one loop just to be safe, and remember from here on out as long as you do not remove power from the motherboard, you should only need to boot holding down the insert key if it refuses to boot.