View the System BIOS Information (Windows NT/2000/XP) Popular
This registry key stores information about the system BIOS, including the release date, version number and video BIOS date.

Optimizing L2 Caches Over 256K (Windows NT) Popular
Windows NT by default is optimized for a 256K size L2 cache. With most computers now having L2 caches larger than 256K it pays to take the time to change the SecondLevelDataCache setting to correspond to the size of the L2 cache installed.

View System Processor Information (Windows NT/2000/XP)
These values contain information about the system processor, including speed, brand and model.

Manage Native Processor Performance Control (Windows XP)
Windows includes built-in processor performance control to manage the microprocessor so it is more efficiently utilized. This tweak allows you to modify this feature.

Enabling UDMA66 Mode on Intel Chipsets (Windows 2000/XP) Popular
If you have a computer with an Intel chipset that supports UDMA66, you will still find that UDMA66 mode is disabled by default on Windows 2000 computers. This tweak allows you to enable or disable it.

Modify the Paged and Non Paged Pool Memory Sizes (Windows NT/2000/XP)
Windows normally calculates the paged and non paged pool memory sizes using complex algorithms based on physical memory size. These settings allow you to override and manually specify values.

Improve Core System Performance (Windows NT/2000/XP) Popular
On systems with large amount of RAM this tweak can be enabled to force the core Windows system to be kept in memory and not paged to disk.

Fix AMD Athlon AGP Paging Issue (Windows 2000) Popular
Windows 2000 based computers may stop responding when you use an Accelerated Graphics Port (AGP) program with an AMD Athlon processor. This is due to the memory allocated by the video adapter driver becoming corrupted. This registry tweak will fix the problem.