ASUS P5W DH Deluxe motherbroad is it 32 bit cpu or 64bit cpu?

ASUS P5W DH Deluxe motherbroad is it 32 bit cpu or 64bit cpu?

Processors are 32 or 64 bit, not motherboards. You can check processor support for that motherboard at Asus' website.
It supports Core 2 Duo processors, Core 2 Duo processors are 64-bit. However, I do not have a sneaking suspicion that you should install a 64-bit operating system unless you dual boot it with a 32-bit operating system. 64-bit driver support hasn't moderately arrived yet.