| Product |
Business use |
Processor (Max) |
Memory (Min/Max) |
Internal storage (Max) |
IBM System p5 520 Express (Rack-mount/deskside)

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Browse & Buy |
The System p5™ 520 is ideally suited for use as a small database server, a branch application server, and for highly secure e-business and business intelligence (BI) / high performance computing (HPC) applications for enterprises of all sizes. |
One or two 64-bit 2.1 GHz POWER5+™ |
1 GB to 32 GB of DDR2 SDRAM |
Up to 2.4 TB (16.8 TB with optional disk drawers) |
IBM System p5 520Q Express

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Browse & Buy |
The System p5™ 520Q is designed to meet the demands of eCommerce and Web infrastructure applications and can support a high transaction environment based on the Java™ platform or compute-intensive database applications. |
Four 64-bit 1.65 GHz POWER5+™ |
1 GB to 32 GB of DDR2 SDRAM |
Up to 2.4 TB (16.8 TB with optional disk drawers) |
IBM System p5 550 Express

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Browse & Buy |
The performance, reliability and affordability features of the p5-550 Express can make it a strategic platform for scalable database servers, e-commerce application servers, Web servers, operations systems, and for BI and high performance computing (HPC) workloads. |
Two or four 64-bit 2.1 GHz POWER5+™ |
1 GB to 64 GB of DDR2 SDRAM |
Up to 2.4 TB (31.2 TB with optional I/O drawers) |
IBM System p5 550Q Express

More details
Browse & Buy |
The System p5™ 550Q Express is ideally suited for compute-intensive business intelligence (BI), scientific and engineering analytical applications, database applications or server consolidation. |
Four or eight 64-bit 1.65 GHz POWER5+™ |
1 GB to 64 GB of DDR2 SDRAM |
Up to 2.4 TB (31.2 TB with optional disk drawers) |