Some Pentium 4 multiprocessor platforms will benefit from enabling the use of extended memory manager interface (XMMI) memory zeroing.

NOTE: You MUST check with your original equipment manufacturer before implementing this tip because some Pentium 4 multiprocessor platforms will experience a performance degradation.

To enable XMMI memory zeroing:

1. Copy / Paste the following to a XMMIZeroingEnable.reg file:

REGEDIT4

\[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\kernel\]
"XMMIZeroingEnable"=dword:00000001

2. Merge the XMMIZeroingEnable.reg file with your registry, or run regedit /s XMMIZeroingEnable.reg.

3. Shutdown and restart Windows Server 2003.