5.5 GHz System z Microprocessor and Multi-Chip Module J. Warnock 1 , Y. Chan 2 , H. Harrer 3 , D. Rude 2 , R. Puri 4 , S. Carey 2 , G. Salem 5 , G. Mayer 3 ,Y.-H. Chan 2 , M. Mayo 2 , A. Jatkowski 2 , G. Strevig 6 , L. Sigal 4 , A. Datta 7 , A. Gattiker 8 , A. Bansal 4 , D. Malone 2 , T. Strach 3 , H. Wen 6 , P.-K. Mak 2 , C.-L. Shum 2 , D. Plass 2 , C. Webb 2 IBM Systems and Technology Group: 1 - Yorktown Heights, NY 2 - Poughkeepsie, NY 3 – Boeblingen, Germany 5 - Williston, VT 6 - Austin, TX 7 – Bangalore, India IBM Research: 4 - Yorktown Heights, NY 8 – Austin, TX