Is Intel® Core™ Duo processor32 bit or 64 bit technology?
To verify whether or not an an Intel® processor is 32 bit or 64 bit capable, check the “Supported Features” section within Processor Spec Finder to see if Intel® 64 is listed. If so, the processor in question is 64 bit capable. 64-bit computing on Intel® architecture requires a computer system with a processor, chipset, BIOS, operating system, device drivers and applications enabled for Intel® 64 architecture. Processors will not operate (including 32-bit operation) without an Intel 64 architecture-enabled BIOS. Performance will vary depending on your hardware and software configurations. See http://www.intel.com/technology/intel64/index.htm for more information including details on which processors support Intel® 64 or consult with your system vendor for more information.
