Windows 8

Why do we need 128bit CPU architecture?

With some ‘leaked’ information about Microsoft’s plan to include brand new IA-128 computer processor architecture in their next version of Windows (8 & 9) it got me thinking about the need for 128-bit CPUs. What’s the point? Memory Addressing This is often cited as the reason for needing to increase the number of bits in a CPU. With a 32bit register you can address approximately 2^32 bytes of RAM, or about 4GiB system wide.