An overclocked G3258 will massively beat any i3 in single and dual threaded tasks (such as Dolphin and the majority of day-to-day stuff), and will beat or tie an i3 in tasks with three or more threads. This has the notable exception of things that refuse to run on dual-core chips, like Far Cry 4 - they count the number of hardware threads (sometimes counting hyperthreads too) and just refuse to run, even if they'd run fine when threads were switched on just the two cores.
OS: Windows 10 64 bit Professional
CPU: Intel i5 4670K@3.4GHz... for now @4.6GHz with a quick and dirty (yet stable) OC. May get faster in a bit before the end of time.
RAM: 16GB (Down from 24 GB after some was given to siblings)
GPU: Radeon Vega 56
CPU: Intel i5 4670K
RAM: 16GB (Down from 24 GB after some was given to siblings)
GPU: Radeon Vega 56