The 266a bios handles memory way better, the improvement in speed is about the same as going from a 1600 to a 1900 athelon. But its free.
A 1600 xp is 1400 mhz clock speed
A 1900 xp is 1600 mhz clock speed.
thats a 14% diff or so.
The 266a chipset boosts performance by 15-20% or so depending on which chipset it is compared too.
I dont know if those numbers hold up under scietific scrutiny HB but that is the reason why people are so insistant about using the new bios.
[ 12-03-2001: Message edited by: Pongo ]