Dell PowerEdge 1655MC - Manual (Page 13)

Optimal BIOS settings for HPC with Dell PowerEdge 12 th generation servers
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Figure 2. Local, remote and interleaved memory bandwidth
* Data collected on a PowerEdge R620, Dual Intel Xeon E5-2680 @ 2.7GHz, 8*8GB 1600MT/s memory.
Performance Optimized System Profile, Logical Processor Disabled.
This section focused on memory bandwidth from a memory interleaving point of view. Additional
memory benchmarking results are available in this
blog post .
3.4. Logical Processor
Like previous Intel architectures, the Intel Xeon E5-2600 series offers the option of Logical
Processor or Hyper-Threading (HT) or Simultaneous Multi Treading (SMT). When Logical Processor is
enabled, the operating system sees twice as many physical cores. This is accomplished by ascribing
two logical cores to each physical core. SMT can improve performance by assigning threads to each
logical core; however, the logical cores share the physical cores’ resources, and the actual
performance gain can be very application specific.
This option can be set from the BIOS Processor Settings menu.
3.5. BIOS options specific to latency sensitive applications
Latency sensitive applications and industries like High Frequency Trading tend to have very specific
requirements. In almost all cases, performance oriented features are turned on while all power
saving options are turned off to avoid any latency penalties as the system transitions in and out of
low-power sleep states.
Some of the BIOS options that should be tuned for latency sensitive applications are the following:
 Turbo Boost – Disabled. This is to ensure stable and repeatable performance. But note that
some applications can benefit from enabling Turbo Boost. It is recommended that the
actual application be tested to determine the benefit of Turbo Boost.
26% lower
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Memory Bandwidth - Local, Remote and Interleaved
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Remote