Hi Guido, maybe you should use prtdiag. In this case the relevant section should look like this: ========================= CPUs =============================================== Run E$ CPU CPU Brd CPU MHz MB Impl. Mask --- ----- ---- ---- ------- ---- A 0, 16 1050 16.0 US-IV 2.4 B 1, 17 1050 16.0 US-IV 2.4 A 2, 18 1050 16.0 US-IV 2.4 B 3, 19 1050 16.0 US-IV 2.4 Bye, Jens