5137ch03.fm
Draft Document for Review October 14, 2014 10:19 am
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IBM Power Systems E870 and E880 Technical Overview and Introduction
Figure 3-2 shows the compatibility modes within the LPAR profile.
Figure 3-2 Configuring partition profile compatibility mode using the HMC
Table 3-2 lists the differences between processors modes.
Table 3-2 Differences between POWER6, POWER7, and POWER8 compatibility modes
POWER6 and
mode
POWER7 mode
POWER8 mode
Customer value
2-thread SMT
4-thread SMT
8-thread SMT
Throughput
performance, and
processor core usage
Vector Multimedia
Extension/ AltiVec
(VMX)
Vector scalar
extension (VSX)
VSX2
In-Core Encryption
Acceleration
High-performance
computing
Affinity off by default
3-tier memory,
micropartition affinity,
and dynamic platform
optimizer
HW memory
affinity tracking
assists
Micropartition
prefetch
Concurrent LPARs
per core
Improved system
performance for
system images
spanning sockets and
nodes