This is for his mom's computer, not a gaming machine. Any of low end Intel duals would be fine, as would any of the AMD duals. Heck, even a single core would do her fine.
You can go with all low end parts and still have a machine that will out-perform whatever she wants to do. My wife's computer is an old Athlon 2000+, and it would work fine for what your mom will probably do with it.
You can go with all low end parts and still have a machine that will out-perform whatever she wants to do. My wife's computer is an old Athlon 2000+, and it would work fine for what your mom will probably do with it.