The difference is the size of transitors, than is 90nm means the transitors are 90 nanometers across. The cores are identicle, just that the 90nm Winchester cores are smaller. They do operate on a lower core voltage (1.4 vs. 1.5) and consume overall less power so they run cooler. Because of those two factors, they often overclock better as well.
Oh yeah. Looked a little closer and noticed the 90nm is @1.4v stock while the 130nm is 1.5v. From my limited perspective, that may allow a little faster OC or less volts to stablize. What impact does having more paths in the cpu have?
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