Specifications

48 IBM Power 770 and 780 Technical Overview and Introduction
2.2 POWER7 processor cards
IBM Power 770 and Power 780 servers are modular systems built using one to four CEC
enclosures. The processor and memory subsystem in each CEC enclosure is contained on a
single processor card. The processor card contains either two or four processor sockets and
16 fully buffered DDR3 memory DIMMs.
The IBM Power 770 supports the 2-socket processor cards, populated with 6-core or 8-core
POWER7 processors. This enables a maximum system configuration of 64-cores, built from
four CEC enclosures.
The IBM Power 780 supports both the 2-socket and 4-socket processor cards. The 4-socket
processor cards are populated with 6-core POWER7 processors, enabling a maximum
system configuration of 96 cores.
2.2.1 Two-socket processor card
The 2-socket processor card (Figure 2-8) is supported in both the Power 770 and the
Power 780 system. Each processor is connected to eight DIMMs via two memory controllers
(four DIMMS on each).
Figure 2-8 IBM Power 770 and Power 780 2-socket processor card
b. For more information about sleep and nap modes, see 2.15.1, “IBM EnergyScale technology”
on page 114.
Note: Mixing 2-socket and 4-socket CEC enclosures within a Power 780 is not supported.
POWER7
processors
DDR3
Memory
DIMMs