It will run acceptably on a Core 2 Quad with an SSD and 8GB of RAM, but official support has ended.
Option C: The High-Clock Dual-Core (Core 2 Duo E8400, E8500, or E8600) intel pentium dual cpu e2160 upgrade
The absolute biggest performance gain for an E2160 system is swapping the spinning hard drive for a SATA II SSD (e.g., Kingston A400 or Samsung 860 EVO). It will run acceptably on a Core 2