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A highly available and expandable, rack-dense, 2U dual-socket SMP server, for application
serving in Web environments
greater investment protection than a one-year warranty does.
Key Features High-Performance Xeon Processors
The x3650 supports up to two high-performance Intel Xeon processors, allowing you to upgrade
to a second processor as business needs require. The x3650 offers a choice of processor clock
rates, FSB speeds and energy-efficiency:
• 120W quad-core Xeon processor models X5450, X5460, or X5470 at 3.0, 3.16, 3.33GHz
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).
Ultralow power processor L5430 at 2.66GHz is supported via CTO.
• 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). Processor E5410 at 2.33GHz is supported via CTO.
• 65W dual-core Xeon processor model E5205 at 1.86GHz with 64-bit extensions, a 1333MHz
FSB, and 6MB of shared L2 processor cache. 80W dual-core Xeon processor model X5260
at 3.33GHz with 64-bit extensions, a 1333MHz FSB, and 6MB of shared L2 processor cache
is supported via CTO.
• 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.
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 independent caches (one per core or 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 providers 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.
DDR II ECC Fully Buffered Memory with Chipkill Protection
The x3650 supports up to 48GB of memory in 12 DIMM sockets. Some models include two
512MB DIMMs standard, while others ship with two 1GB DIMMs. The x3650 uses PC2-5300
fully-buffered double data rate II (DDR II) memory (operating at 667MHz) for faster access,
and provides Active Memory features, including advanced Chipkill memory protection, for up to
16X better error correction than standard ECC memory.
The fully buffered memory in the x3650 provides up to triple the memory bandwidth (up to
21.3GBps in four channels of PC2-5300 fully-buffered DIMMs vs. a maximum of 6.4GBps in two
channels of unbuffered PC2-3200 memory) and up to triple the system memory capacity (12
DIMMs x 4GB) of the predecessor x346 server (8 DIMMs x 2GB). By performing reads and
writes simultaneously, it eliminates the previous memory read-to-write blocking latency. In
addition, it also offers innovative data reliability and security features to help improve data
integrity, including enhanced CRC protection, data retry on error detect and buffer registers for
improved fault isolation.
For increased availability, the x3650 offers two additional (but mutually exclusive) levels of IBM
Active Memory protection: online memory mirroring, and online hot-spare memory.
Memory mirroring works much like disk mirroring. The total memory is divided into two channels.
Please see the Legal Information section for important notices and information.
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