After benchmarking the A6-6400K and the Pentium G3220, which are direct competitors, as both have the exact same price tag in the United States, we can say with confidence that the Pentium G3220 has a higher processing power than the A6-6400K. It may be a surprise for some users who still link processing performance to clock rate, since the contender from AMD has a higher clock rate than the Intel’s (3.9 GHz vs. 3.0 GHz). In truth, clock rates are only meaningful when comparing CPUs with the same internal architecture, which is not the case.
On the other hand, the 3DMark and the F1 2013 tests (other recent games did not run with at least one of the CPUs) suggest the integrated GPU of the A6-6400K is faster than the one embedded in the Pentium G3220. While it is not powerful enough to run recent games in higher resolutions and/or image quality settings, the Radeon HD 8470D engine included in the A6-6400K can actually run older games at a decent frame rate, which means this CPU can be a better solution for the casual gamer who wants an inexpensive system to run older games.
Then again, a low-cost Radeon R7 240 manages playable performance at 1920x1080 in some games, so long as you're willing to except the lowest-quality settings available