Question: what is the difference between windows 7 ultimate x86 and x64?
Answer: Difference between x64 and x86. It usually refers to x86 for 32 bit OS and x64 for system with 64 bit. ... The 32 bit processors are designed to handle a limited amount of physical memory maximum of 4GB but 64 bit can handle high memory utilizing 8,16 and some even32 GB.