Hmm, MSI K7T Pro 2a board? Isn't that based on the KT133A chipset? If it is, before buying a new chip, try running the FSB at 133mhz then having the proc at 733, 800, 866, 933, or even 1ghz. Overclocking will show you what you can expect from a faster chip 🙂 Heck, Durons are cheap 😀