Specifications
Chapter 1. General description 3
Figure 1-1 shows a Power 770 with the maximum four enclosures, and the front and rear
views of a single-enclosure Power 770.
Figure 1-1 Four-enclosure Power 770, a single-enclosure Power 770 front and rear views
1.1.2 IBM Power 780 server
Each Power 780 processor card comprises either two single-chip module (SCM) POWER7
processors or four SCM POWER7 processors, each designed with 64-bit architecture. Each
POWER7 SCM enables either up to six or eight active processor cores with 2 MB of L2 cache
(256 KB per core, 24 MB of L3 cache (4 MB per core) for the 6-core SCM, and 32 MB of L3
cache (4 MB per core) for the 8-core SCM.
For the Power 780, each POWER7 SCM processor is available at frequencies of 3.44 GHz
with six cores, 3.92 GHz with eight cores, or 4.14 GHz with four cores. The Power 780 server
is available starting as low as four active cores and incrementing one core at a time through
built-in Capacity on Demand (CoD) functions to a maximum of 96 active cores.
The Power 780 features the truly unique ability to switch between its standard throughput
optimized mode and its unique TurboCore mode. In TurboCore mode performance per core
is boosted with access to both additional cache and additional clock speed. Based on the
user's configuration option, any Power 780 system can be booted in standard mode, enabling
up to a maximum of 64 processor cores running at 3.92 GHz, or in TurboCore mode, enabling
up to 32 processor cores running at 4.14 GHz and twice the cache per core.
A single Power 770 CEC enclosure is equipped with 16 DIMM slots running at speeds up to
1066 MHz. A system configured with four drawers and 64 GB DDR3 DIMMs supports up to a
maximum of 4.0 TB of DDR3 memory. All POWER7 DDR3 memory uses memory
architecture that provides increased bandwidth and capacity. This enables operating at a
higher data rate for large memory configurations.
Power 770 single enclosure front viewPower 770 with 4 enclosures
Power 770 single enclosure rear view
Note: TurboCore mode is not supported on the 6-core processor card.