> manufactured in 2007-2008

2003-2006, actually.

> there are three CPUs, 1.6-1.8-2 Ghz.

Three CPUs (970, 970FX, 970MP) with various clock speeds each, actually:

970: 1.6, 1.8, 2.0
970FX: 1.8, 2.0, 2.3, 2.5, 2.7
970MP: 2.0, 2.3, 2.5