Then go down to 4.4 OC...the 4.5 is not worth it as it is pushing the CPU way harder than it would need to be. Diminishing gains like that are tell tale signs that it is not worth doing. For example: 1.25v is 3.8, 1.26v is 4.0, 1.27v is 4.2, 1.28v is 4.4, and 1.31v is 4.5...so 4.5 would not be worth it. (just making up an example).