Though I do not know the specific
motherboard you mention, it is highly unlikely that your AMD CPU will be
permanently attached. You will still be unable to replace it with a
Pentium, however.
As shown on our K6-2 stats page,
these CPU's are typically mounted in a Socket-7 configuration on the
motherboard. A Pentium II 400MHz is only available on a Slot-1
interface card.
For upgrade options, it looks like you will be limited to AMD's line at
the moment. Depending on your motherboard, you may be able to jump right
to a K6-III, which is almost
25% faster than a Pentium II 400.
If your motherboard only likes K6-2's, even the latest 475MHz model will
boost your system more than 10% faster
than the Pentium.