According to benchmarks posted on HWBOT.org, the A12-9800 appears to have a lot higher overclocking potential compared to the previous-generation Kaveri APUs.

The A12-9800 arrives at your door with 65W TDP, quad-core CPU, working at 3.8 GHz base and 4.2 GHz Turbo clock, as well as GPU with 8 CUs and 512 Stream Processors, clocked at 1108 MHz.

It looks like the user did his test with the using a B350 chipset-based Asus Octopus motherboard and 8GB RAM. With this setting, the A12-9800 managed to score 4798.9MHz at 1.325V.