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A highly available and expandable, rack-dense, 1U dual-socket SMP server, for application
serving in Web environments
Key Features
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For terms and conditions or copies of the IBM Statement of Limited Warranty, call 800-772-2227 in the U.S. In Canada call 800-
426-2255. Telephone support may be subject to additional charges. For warranties including onsite labor, a technician is sent after
IBM attempts to resolve the problem remotely. International warranty service is available in any country in which this product is
sold.
Please see the Legal Information section for important notices and information.
they were constantly running at full speed.
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The three-year (parts and labor) limited onsite warranty
and greater investment protection than a one-year warranty does.
High-Performance Xeon Processors
The x3550 supports up to two high-performance Intel Xeon processors, allowing you to upgrade
to a second processor as your business needs require. The x3550 offers a choice of processor
clock rates, FSB speeds and energy efficiency, including:
• 120W quad-core Xeon processor models X5450 or X5460 at 3.0, 3.16Ghz respectively with
64-bit extensions, a 1333MHz FSB, and 12MB of L2 processor cache (2 x 6MB)
• 50W quad-core Xeon processor model L5420 at 2.5GHz, with 64-bit extensions, ultralow
power draw (12.5W per core), a 1333MHz FSB, and 12MB of L2 processor cache (2 x 6MB)
• 80W quad-core Xeon processor models E5405, E5420, E5430, E5440 at 2.0, 2.5, 2.66,
2.8GHz (respectively), with 64-bit extensions, a 1333MHz FSB, and 12MB of L2 processor
cache (2 x 6MB)
• 50W quad-core Xeon processor models L5310 or L5320 at 1.6 or 1.86GHz (respectively),
with 64-bit extensions, ultralow power draw (12.5W per core), a 1066MHz FSB, and 8MB of
L2 processor cache (2 x 4MB)
• 65W dual-core Xeon processor model E5205 at 1.86GHz, with 64-bit extensions, low power
draw, a 1066MHz FSB, and 6MB of shared L2 processor cache
• 80W dual-core Xeon processor model 5160 at 3.0GHz, with 64-bit extensions, reduced power
draw, a 1333MHz FSB, and 4MB of shared L2 processor cache
• 65W dual-core Xeon processor model 5140 at 2.33GHz, with 64-bit extensions, low power
draw, a 1333MHz FSB, and 4MB of shared L2 processor cache
• 65W dual-core Xeon processor model 5110 at 1.6GHz, with 64-bit extensions, low power
draw, a 1066MHz FSB, and 4MB of shared L2 processor cache
Dual-core Xeon processors contain two complete processor cores; quad-core processors,
similarly, contain four cores. Some processors contain one unified cache shared by all cores,
while other processors have multiple independent caches (one per pair of cores). The shared
cache is dynamically allocated between the cores as needed. The multiple cores appear to
software as multiple physical processors. The dual-core processors offer considerably higher
performance than a same-speed Xeon processor with a single core. Likewise, quad-core
processors offer considerably higher performance than a same-speed Xeon processor with dual
cores.
Intel Extended Memory 64 Technology (EM64T) 64-bit extensions allow the Xeon processor to
use large memory addressing when running with a 64-bit operating system. This in turn lets
individual software processes directly access more than 4GB of RAM, which was the limit of 32-
bit addressing. This can result in much higher performance for certain kinds of programs, such as
database management and CAD. Additional registers and instructions (SSE3) can further boost
performance for applications written to use them. Contact your software provider to determine
their software support for EM64T.
The 1066MHz FSB (which connects memory to the processor) boasts a peak rate of 8.53GBps,
or up to one-third higher throughput at the same processor clock speed than an 800MHz FSB
(6.4GBps) used in older systems. The 1333MHz FSB offers a peak rate of 10.67GBps, or up to
two-thirds higher throughput at the same processor clock speed than an 800MHz FSB. This may
result in much higher data transfer rates.
Intelligent Power Capability powers individual processor elements on and off as needed, to
reduce power draw.
Execute Disable Bit functionality can help prevent certain classes of malicious buffer overflow
attacks when combined with a supporting operating system.
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helps afford you peace of mind
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