IBM eServer zSeries 900 Technical Guide

44 IBM eServer zSeries 900 Technical Guide

Figure 2-11 12-PU MultiChip Module

2.4.8 PU design

The z900 servers utilize two types of PU chips:

򐂰 CMOS 8S (0.18 micron) with Copper Interconnect technology running at 769 MHz,

resulting in a cycle time of 1.3 nanoseconds.

򐂰 CMOS 8SE (0.18 micron) with Copper Interconnect and Silicon-On-Insulator (SOI)

technologies running at 917 MHz, resulting in a cycle time of 1.09 nanoseconds.

Each PU chip is 17.9 x 9.9 mm and has 47 million transistors (Figure 2-12).

The z900 turbo models (2C1 to 2C9 and 210 to 216) use the CMOS 8SE chips, and the z900

non-turbo models (100, 101 to 116 and 1C1 to 1C9) use the CMOS ...