Dozens of motherboard models are capable of supporting an Intel Pentium Dual-Core.
Yes. The GA-6BXC can support any Slot 1 Intel Pentium II or Pentium III processor. For the faster Pentium IIIs, you will need to purchase a "slotket" to convert a Socket 370 processor to the Slot 1 interface.
That would require purchasing a new motherboard, processor, and power supply.
Pentium II
None, other than that you can get a Pentium I computer for about $5.
All Pentium 4 processors support SSE2.
No. The newer processor will not use the same motherboard.
smm
No, you cannot.
There is no such thing as an "Intel Premium" processor, and the Intel Pentium is 16 years old.
macjine activites
You cannot convert an existing motherboard to DDR2. As The Intel Pentium D was actually designed for motherboards with DDR2 RAM (you must have gone out of your way to purchase one with DDR RAM), it should be no problem to move the processor to another board.
No, it's Intel CPU Based Motherboard