Is there a notable difference between windows x86 and x64?

Hello. I would just like to ask if there is a notable difference if I change my windows 7 from x64 to x86 or vice versa? I believe x64 operates at 64bits for processing ram, while x86 performs at only 32 bits. From what I understand, I think the x86 is more compatible to 32- and 64-bit programs. But in terms of... show more Hello. I would just like to ask if there is a notable difference if I change my windows 7 from x64 to x86 or vice versa? I believe x64 operates at 64bits for processing ram, while x86 performs at only 32 bits. From what I understand, I think the x86 is more compatible to 32- and 64-bit programs. But in terms of graphics/memory performance, does this mean that the x64 version performs better?
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