configuration rules, performance issues and potential licensing implications related to Hyper-Threading before you proceed.

Eight-way systems: Hyper-Threading is disabled by default on the x440. This is because of a known bug in Windows 2000 Advanced Server. If Hyper-Threading is enabled on an eight-way server, then the Windows 2000 Advanced Server will trap (blue screen) during installation. This problem does not affect other supported operating systems. You can enable Hyper-Threading on an eight-way Advanced Server system after Service Pack 2 or later has been installed.

Windows 2000 Advanced Server supports a maximum eight processors. There is no performance benefit to be gained from enabling Hyper-Threading on an eight-way Advanced Server system.

To enable Hyper-Threading on the x440, do the following:

1.Press F1 during system startup to enter the System Configuration Utility.

2.From the main menu, select Advanced Setup -> CPU Options. Figure 4-2 appears.

Figure 4-2 Enabling Hyper-Threading

3.Change the Hyper-Threading Technology setting to Enabled.

4.Exit the System Configuration Utility saving changes.

110IBM ^xSeries 440 Planning and Installation Guide

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IBM 440 manual Enabling Hyper-Threading