2 IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction
1.1 Systems overview
You can find detailed information about the Power 770 and Power 780 systems within the
following sections.
1.1.1 IBM Power 770 server
The Power 770 processor card features 64-bit architecture designed with four single-chip
module (SCM) POWER7+ processors. Each POWER7+ SCM enables up to either three or
four active processor cores. The 3-core SCM has 756 KB of L2 cache (256 KB per core) and
30 MB of L3 cache (10 MB per core). The 4-core SCM has 1 MB of L2 cache (256 KB per
core) and 40 MB of L3 cache (10 MB per core).
A Power 770 server using 3-core SCM processors will enable up to 48 processor cores
across four enclosures, running at frequencies of 4.22 GHz. The Power 770 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 48 active cores.
A system using 4-core SCM processors will enable up to 64 processor cores across four CEC
enclosures running at frequencies of 3.8 GHz. The server can be specified starting with only
four active cores and incrementing one core at a time through built-in CoD functions, to a
maximum of 64 active cores.
A single Power 770 CEC enclosure is equipped with 16 DIMM slots running at 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 increase enables operating at a higher data
rate for large memory configurations.
The Power 770 has two integrated POWER7+ I/O controllers that enhance I/O performance
while supporting a maximum of six internal Peripheral Component Interconnect Express
(PCIe) adapters and six internal small form-factor SAS DASD bays.
The Power 770 supports Active Memory Mirroring (AMM) for the hypervisor, which is
available as an optional feature. AMM guards against system-wide outages as a result of any
uncorrectable error associated with firmware. When featured, it can be enabled, disabled, or
re-enabled depending on the user’s requirements.
Also available as an option is Active Memory Expansion, which enhances memory capacity.
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