Linpack - Performance on Intel® Xeon® processor E5570 (code-named Nehalem) 2.93GHz vs Intel Xeon processor E5472 (code-named Harpertown) in SGI® Altix® ICE 82000EX on 2 Sockets

Linpack on Intel Xeon processor E5570 (code-named Nehalem) 2.93GHz is 3% faster than Intel Xeon processor E5472 (code-named Harpertown) 3.0GHz in SGI Altix ICE 8200EX in spite of the lower frequency, reason being the higher efficiency 91.5% on Intel Xeon processor E5570 vs 86.7% on Intel Xeon processor E5472. Turbo ON provides 2.4% performance boost.