I got my 8kha+, was all happy, and installed everything. I didn't update the bios because I heard that it had problems with the 8500. Now people are telling me that without the bios update the board doesn't support the sse functions on the XP. If I wanted to update the bios now, would I have to reinstall my OS's for it to get full sse support?

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Athlon XP 1800+ (OC pending)
Epox 8KHA+
Maxtor D740x 40 GB
ATI Radeon8500 (300/300)