Dell PowerEdge 1655MC - Manual (Page 30)

Optimal BIOS settings for HPC with Dell PowerEdge 12 th generation servers
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Turbo Boost
6) Turbo Boost disabled reduces application performance by up to 15% compared to Turbo Boost
enabled. But, at the same time, Turbo Boost disabled consumes 10% to 27% less power. This
translates in to 3% to 20% better energy efficiency with Turbo Boost disabled.
Reference Figure 6 - Performance and Energy Efficiency of Turbo Boost
Node Interleaving
7) Node Interleaving enabled hurts performance by up to 10% compared to this option set to disabled.
It does not benefit any application. Energy efficiency with Node Interleaving enabled is up to 9%
lower.
Reference Figure 7 - Performance and Energy Efficiency of Node Interleaving
Logical Processor
8) The impact of Logical Processor is application specific. Some applications benefit, and some do
not. For applications that have core-based licenses, it is likely that the cost of extra licenses will
significantly outweigh any performance benefits of Logical Processor enabled. For other
applications, it is recommended that this setting be tested to determine the best option.
Reference Figure 8 - Performance and Energy Efficiency of Logical Processor
C States and C1E on remote memory access
9) Disabling C States and C1E can help remote memory bandwidth by ~24% when compared to C States
and C1E enabled on systems where the remote cores are idle.
Reference Figure 9 - Impact of C States and C1E on remote memory access
Latency sensitive applications
10) Recommendations for latency sensitive applications are detailed in this study.
Comparison to Dell PowerEdge 11 th generation servers
11) A 16-server 12 th generation blade cluster consumes 11% to 25% less power when idle compared to a
similarly configured 11 th generation cluster.
Reference Figure 10 - 11th vs. 12th generation cluster – idle power comparison
12) A 16-server 12 th generation cluster’s performance was measured to be up to 3.6x that of a similarly
configured 11 th generation cluster, with the 12 th generation cluster being up to 2.9 times more
energy efficient.
Reference Figure 11 - 11th vs. 12th generation cluster – performance and energy efficiency
comparison