These are suggestions from the techbargains.com site:
Hard Drive Port
Make sure your hard drive is not connected to the same IDE port as your CD/DVD-ROM. Each IDE port is programmed to operate at the slower of the two devices on the port, so you could be slowing down access to your primary hard drive by leaving a CD-ROM on the same channel. Put your CD/DVD-ROM on the Secondary IDE port.
Intel Application accelerator lets you independently set tranfer rates for devices on the same cable.
IDE DMA
Windows does not automatically utilize faster DMA IDE data transfer modes on IDE slave drives. Programmed I/O mode is the default setting.
1)) Right click on "My Computer", select the Hardware tab, and Select Device Manager.
2) Expand "IDE ATA/ATAPI Controller" and double-click on "Primary IDE Channel"
3) Under "Advanced Settings" tab, check the "Device 1" setting. Set it to "DMA if available"
4) Repeat the step for the "Secondary IDE Channel" if devices are present there.
SCSI Write Cache
Many SCSI drives do not have their write caches enabled. Use a Mode Page Editor such as the one built into EZ-SCSI to enable Write Caching on all your hard drives. Windows XP allows you to enable Write Caching in the Properties page of a SCSI Drive.
Minimize Background Applications and Services
Press CTRL-ALT-DEL while in Windows and bring up the Task Manager. Notice how many programs are running in the background. Each program steals memory and CPU cycles. Offenders include: Fast Find, Office Startup, System Agent, Real Player, Norton. To stop programs from automatically starting, remove the file from the Programs - Startup folder, left click on the icons in the System tray and turnoff automatic loading, or consult the help file of each program to turn it off. Disable File and Print, Web, database, Computer Browser, and terminal services if they are not being used. Configure Virus scanning to only scan incoming files. Run MSCONFIG to get a list of programs that run on startup and remove unnecessary ones.
Removed Unused Programs, Protocols, and Fonts
Uninstall any Programs that you do not use. Also remove any Fonts that are not used. This will free up disk space and make the machine boot faster. You should also remove any temporary files located in the C:\TEMP, C:\WINDOWS\TEMPORARY INTERNET FILES, or C:\WINNT\TEMP directories. Also remove any unused Network Protocols such as NetBEUI or IPX.
Virtual Memory
Windows uses your Hard Drive as swap memory but its default configuration can cause a major loss of performance with the memory swap file getting moved around.
Select System icon from the Control Panel - Performance and Maintenance, select Advanced Tab, select Performance areas, and click on Settings Under virtual Memory click Change. The Initial and Maximum size should be equal otherwise Windows will keep resizing the file. The optimal memory setting for users with 128 MB+ is approximately 1.5 times the RAM size, users with 64 MB should use a 2 times multiple. You should also locate Virtual Memory on your fastest drive or striped RAID volume, placing it on the non-boot drive, can help increase performance. Defragment after setting this to minimize fragmentation and force the swap file to get located on the fastest part of your disk. Third party defragmentaters can optimize the swap file.
Always make sure your system has enough RAM. 128MB is the absolute minimum. You can bring up the Performance Tab of the Task Manager to ensure that Total Commit Charge is lower than your Total Physical Memory. If not, add ram.
Memory Tweaks
There are 3 tweaks you can make to change how XP uses memory.
Open Regedit and Find HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory Management
Disable Paging Executive:
XP pages data from RAM memory to the hard drive. We can stop this happening and keep more data in RAM, resulting in better performance. Users with a large amount of RAM (256MB+) should use this setting. The setting we change to disable the ’Paging Executive’, is DisablePagingExecutive. Changing the value of this key from 0 to 1 will de-activate memory paging.
System Cache Boost:
Changing the value of the key LargeSystemCache from 0 to 1 will tell XP to allocate all but 4MB of system memory to the file system cache, allowing the XP Kernel to run in memory. The 4MB of memory left is used for disk caching, if more is needed, XP allocates more. Generally, this tweak improves performance by a fair bit but can, in some intensive applications, degrade performance. As with the previous tweak, you should have at least 256MB of RAM before attempting to enable LargeSystemCache.
Input/Output Performance:
This improves performance of large file transfers. By default, a value does not appear in the registry, so you will have to create a REG_DWORD value called IOPageLockLimit. The data for this value is in bytes, and defaults to 512KB on machines that have the value. Most people using this tweak have found maximum performance in the 8 to 16 megabyte range, so you will have to play around with the value to find the best performance. The value is measured in bytes, so if you want, 12MB allocated, it’s 12 * 1024 * 1024, or 12582912. As with all these memory tweaks, you should only use this if you have 256MB or more of RAM.
