True
Processor
Processor
processor
Processors don't connect to a motherboard, there are installed in a socket. What determines if a processor is compatible is the type of processor... PGA(AMD most of the time) or LGA(Intel) and the ammount of pins that are on the motherboard/processor.
Pentium II
There is a limit in the number of physical slots on your motherboard and a limit of what the bios can manage. But remember, 8GB of RAM and a 1.5 GHz processor is not necessarily faster even with 16GB RAM. Having a balance of processor speed an RAM is the way to go.
The processor size or speed does not determine how much RAM your system needs. Generally speaking, the newer the system, the more RAM you can add. The amount of RAM slots on a motherboard and the motherboard's own subsystem (the BIOS) will determine how much RAM you can add to a particular motherboard.
Processor socket and chipset
The Intel Core Duo is installed into a computer as part of the computers processor and is a chip that sits in the motherboard. The Intel Core Duo is a fast processor allowing advanced gaming capabilities
In most cases, no - a motherboard does not ship with a CPU. That said, if you're replacing your motherboard, you may be able to retrieve the old CPU from your previous computer (assuming it too is not broken and is supported by your new board).
Motherboard
An upgrade is possible, but it's not an easy switch. The newer processor requires a specific chip set and socket that differs from the ones installed in most computers. Removing the motherboard may not be an option if you have a laptop, but a desktop could be rebuilt with a new motherboard and CPU to accomodate the new processor.