If you see this recommended for an old game (like The Sims 3 or older CoD titles), be careful. The optimizer is for Windows XP and older AMD dual-core CPUs (pre-Phenom). On Windows 7 and newer, it's deprecated and can cause CLOCK_WATCHDOG_TIMEOUT BSODs.
Today, you are most likely to encounter this software if you install "Game of the Year" editions of older titles like Batman: Arkham City or the original Borderlands , which may still include the optimizer in their installers. Is AMD Dual Core Optimizer Actually Necessary In Windows 7? amd dual core optimizer
Why your old Athlon 64 X2 needed a specific driver to perform its best. If you see this recommended for an old
To understand what the Optimizer did, you have to understand how games were programmed in the early 2000s. Today, you are most likely to encounter this