apcmag.com has a complete introduction to server, including to blade servers. They cover all aspect about servers. From form-factor to the server-management.

Here’s a complete links:

• Introducing Servers
• A Typical Rack Server
• Opening it up
• Heatsink, CPU and fans
• RAM, PCI Express and Graphics
• Power
• UID Led, USB and Panel
• Storage
• Cables
• Management

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