What is best performing single-core socket 775 CPU?

[Sum-Guy]

What is (or was) the best performing single-core socket 775 CPU?

Not considering over-clocking. And don't forget the 3.5 ghz Celeron D 365.

 

[Nuckles_56]

For the fastest single core CPU there is this: http://pcpartpicker.com/part/intel-cpu-at80570pj0936m
The best multicore processor would be this one (for reasonable money) http://pcpartpicker.com/part/intel-cpu-at80580pj0676m

 

[Sum-Guy]

> For the fastest single core CPU there is this: http://pcpartpicker.com/part/intel-cpu-at80570pj0936m

The answer being given is the Intel Core 2 Duo E8600. That answer is obviously wrong, since the E8600 has 2 cores.

The question remains unanswered: What is the fastest or best performing SINGLE CORE socket 775 CPU?