Integrated PCI devices (such as NICs) and SCSI controllers

PCI expansion cards

At start-up, the BIOS identifies the components that require address space. The BIOS dynamically calculates the amount of reserved address space required. The BIOS then subtracts the reserved address space from 8 GB to determine the amount of usable space.

If the total installed system memory is less than the usable space, all installed system memory is available for use only by the operating system.

If the total installed system memory is equal to or greater than the usable address space, a small portion of installed memory is available for use by the operating system.

Removing a Memory Module

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge.

1Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

2Open the system. See "Opening the System" on page 47.

3Press out on the securing clip at each end of the memory module connector. See Figure 3-20.

4Grasp the memory module and pull it out of the connector.

If the module is difficult to remove, gently move the module back and forth to remove it from the connector.

Installing a Memory Module

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge.

1Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

Installing System Components

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Dell T105 Systems owner manual Removing a Memory Module, Installing a Memory Module