Hmm. Didn't know that. I guess that was back in the day when AMD was on top. Well thanks for the answers!
Why was 64-bit created? To be able to execute more data with fewer strings/clock cycles?
One reason is memory addressability. With 32-bits you can only create 2^32, or 4294967296 distinct addresses. If each address point to 1 byte of data that means that with a 32-bit address you can address up to a maximum of 4GB of memory.
This is why Windows 32-bit can only make use of 4GB of memory.
Also like you said you can natively handle data of larger values.