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Testing Details And Test Platforms

Does Power-Saving Technology Kill SSD Performance?
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Testing Details

We ran two system setups that were technically identical except for the motherboard: first we tried Gigabyte’s EX58-UD4P motherboard, followed by Supermicro’s X8SAX in the second set of runs. In the first run we enabled all available power saving mechanisms (for the processor and the platform) and we gradually disabled some of them when doing additional runs. We even switched off virtualization technology in a sixth run, to check whether or not such a feature would have an impact. As you will see on the following pages, all of the power related features have a measurable—and sometimes even noticeable—impact on the performance of the X25-E flash SSD.

Gigabyte EX58-UD4P
RUN 1
RUN 2
RUN 3
RUN 4
RUN 5
RUN 6
Intel Turbo Boost
Enabled
EnabledEnabledEnabledEnabledEnabled
CPU Cores Enabled
All
All
All
All
All
All
CPU Multi-Threading
EnabledEnabledEnabledEnabledEnabledEnabled
CPU Enhanced Halt (C1E)
EnabledEnabledEnabledDisabled
Disabled
Disabled
C3/C6/C7
EnabledDisabled
Disabled
Disabled
Disabled
Disabled
CPU Thermal Monitor
EnabledEnabledDisabled
Disabled
Disabled
Disabled
CPU EIST
EnabledEnabledEnabledEnabledDisabled
Disabled
Virtualization Technology
EnabledEnabledEnabledEnabledEnabledDisabled
Bi-Directional PROCHOT
EnabledEnabledEnabledEnabledEnabledEnabled
Vista Power Options
High Performance
High Performance
High Performance
High Performance
High Performance
High Performance
Supermicro X8SAX
RUN 1
RUN 2
RUN 3
RUN 4
RUN 5
RUN 6
EIST
EnabledEnabledEnabledEnabledEnabledEnabled
C1E
EnabledEnabledEnabledDisabledDisabledDisabled
VT
EnabledEnabledEnabledEnabledEnabledDisabled
Intel C-State Tech
EnabledEnabledDisabled
Disabled
disabled
disabled
ActiveState Power Management
EnabledDisabled
Disabled
Disabled
Disabled
Disabled
Vista Power Options
High Performance
High Performance
High Performance
High Performance
High Performance
High Performance


Test Setup

System Hardware
Hardware
Details
CPU
Intel Core i7-920 (45 nm, 2.66 GHz, 8 MB L2 Cache)
Motherboard (Socket 1366)Gigabyte EX58-UD4P
Revision: 1.0
Chipset: Intel X58 + ICH10R
Bios: F5
Motherboard II (Socket 1366)Supermicro X8SAX
Revision: 1.0
Chipset: Intel X58 + ICH10R
Bios: 1.0B
RAM
2 GB DDR3-1333 Corsair CM3X1024-1333C9DHX
System Hard Drive
Seagate NL35, 400 GB
ST3400832NS
7,200 RPM, SATA/150, 8 MB
Power Supply
OCZ EliteXstream 800W
OCZ800EXS-EU
Benchmarks
Performance Measurements
h2benchw 3.12


System Software&Drivers
Driver
Details
Operating System
Windows Vista Ultimate SP1
Intel Chipset Drivers
9.1.0.1007
AMD Graphics
ATI Catalyst 8.12
Intel Matrix Storage Drivers
8.7.0.1007


Gigabyte EX58-UD4P

Supermicro X8SAX

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