
Originally Posted by
gOJDO
@GoThr3k
So, lets see. You don't believe that 4GHz 45nm C2D with 65W TDP is possible?
According to the 45nm High-K + metal gate parameters(Vcore, IdSat, etc) it provides 30% lower transistor power consumption at 20+% higher frequency.
Lets consider a 65W TDP E6700 as base in the calculation.
2.67GHz * 1.2 = 3.2GHz
65W * 0.7 = 45.5W
If for the 45nm @4GHz the Vcore remains same as for 3.2GHz, it will waste 56.875W.
(4GHz / 3.2GHz) * 45.5W = 1.25 * 45.5W = 56.875W
To 65W, there is +14.3% headroom.
65W / 56.875W = 1.143
Or you can increase Vcore to +6.9% and still be in 65W TDP.
Square root of 1.143 is 1.069.
All E6700 can OC at least 25% and be stable at default Vcore. So, its not a miracle for 65W TDP Woldfdale to have 25% higher clock at 7% higher Vcore.
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