Specifications

14 IBM Power 770 and 780 Technical Overview and Introduction

Figure 1-4 shows the top view of the Power 780 system having four SCMs installed. The four

POWER7 SCMs and the system memory reside on a single processor card feature.

Figure 1-4 Top view of a Power 780 system with four SCMs

In standard or MaxCore mode, the Power 780 system uses all processor cores running at

3.92 GHz and has access to the full 32 MB of L3 cache. In TurboCore mode, only four of the

eight processor cores are available, but at a higher frequency (4.14 GHz), and these four

cores have access to the full 32 MB of L3 cache. Thus, in Turbo-core mode there are fewer

cores running at a higher frequency and a higher core-to-L3-cache ratio.

For a more detailed description of MaxCore and TurboCore modes, see 2.1.5, “Flexible

POWER7 processor packaging and offerings” on page 44.

Several types of Capacity on Demand (CoD) processors are optionally available on the

Power 770 and Power 780 servers to help meet changing resource requirements in an on

demand environment by using resources installed on the system but not activated. CoD

allows you to purchase additional permanent processor or memory capacity and dynamically

activate it when needed.

More detailed information about CoD can be found in 2.4, “Capacity on Demand” on page 60.

Note: TurboCore mode is supported on the Power 780, but is not supported on the

Power 770.

POWER7

Memory

TPMD

PCIe Slot #1

PCIe Slot #2

PCIe Slot #3

PCIe Slot #4

PCIe Slot #5

PCIe Slot #6

Fans