The senior Kaveri model, A10-7850K, is formally an overclocker-friendly APU with unlocked frequency multiplier. This is indicated by the letter K in its model name and by the Black Edition designation on its packaging. However, the 28nm tech process doesn’t endow the Kaveri series with high frequency potential. On the contrary, it is the reason why the A10-7850K works at lower clock rates than the A10-6800K. The new APUs are going to be less overclockable than their predecessors which themselves were far from breaking any overclocking records.
And that’s exactly what we have in practice. The top clock rate our A10-7850K was stable at and didn’t drop its frequency due to overheat was 4.4 GHz. We had had to increase its voltage to 1.44 volts for that.
Besides the x86 section, the integrated graphics core can be overclocked. After increasing the voltage on the CPU-integrated North Bridge to 1.3 volts, we made the graphics core stable at 900 MHz.
The A10-7850K lets you overclock system memory, too. The top frequency is limited to DDR3-2400, though. It means the high-speed DDR3 SDRAM modes available on the LGA1150 platforms do not work on AMD’s new platform although they might improve the integrated graphics core’s performance which obviously lacks memory bandwidth.
With the CPU, GPU and DDR3 SDRAM overclocked, we managed to increase our 3DMark Fire Strike score to 1785 points. It means our overclocking ensured a 15% performance boost.
So, the Kaveri series isn’t good for overclocking. Its frequency potential seems to be smaller even in comparison with the Richland APUs which allowed to overclock their x86 cores to 4.7 or 4.8 GHz and their graphics cores to 1.2 GHz. The Kaveri’s new microarchitecture and 28nm tech process only worsened their overclocking capabilities.