I have had my new setup for a couple of weeks now and have been tinkering in the bios a little but i just CANNOT get it to boot with anything other than the x1.0 strap. Setting the x1.25 or x1.67 strap just results in 3x reboot loop eventually booting with the default settings. Overclocking just on the multiplier i can run with the max available setting. What am i doing wrong? I have never overclocked using the UEFI bios before so its all a bit new to me and there is a lot of setting in there i just don't know what they are. I understand changing the strap overclocks the memory too so i set that to minimum (800MHz) and the cpu multiplier to minimum (12) and left the FSB set to 100. Everything other than the memory voltage ((1.6v) and cpu core voltage (1.375) which are my mulitpier overclocked settings) was set to auto. No joy it still wouldn't boot.? At stock cpu multiplier (37) just overclocking using the FSB results in failure to boot at (iirc) anything above 105. Leaving the FSB alone and overclocking just using the multiplier i can max it out at 45 (4.5GHz) so i should, i assumed, be able to increase the strap and lower the multi to 35 to give me the same speed of 4500MHz and boot to allow me to try to go for a higher speed, but no joy. What am i missing? I assume there must be another setting that needs changing to allow me to use the straps but i have no idea what. Any pointers would be greatfully received. I don't want someone else to overclock it for me but i do want to learn . Full system specs as follows Intel 3820 MSI X79A-GD65 8D 16GB Mushkin Ridgback Redline 2133 64GB Crucial M4 OS Drive. 500GB Samsung Spinpoint storage drive. 1000W Coolermaster Silent Pro Gold. Gigabyte GTX580. Running Windows7 home premium 64bit. Latest bios installed v1.5.