To start off my testing I ran the A10-7870K through our CPU test suite to find out if the bump from 3.7 to 3.9 on the base clock and 4.0 to 4.1 on the turbo clock was enough to help the APUs performance. To start things off I tested using X264 HD where the average FPS jumped up from 109 to 115 on the first test and a little over 1 FPS on the second test. This is a nice improvement but still behind even the old i5-2500K. This does however put the APU performance up close to AMDs FX-8320E.
Next I went with my favorite benchmark, Cinebench where we can see the single core performance in addition to full CPU performance. By being able to see single core performance we can see how well less optimized games will perform and this also helps level the playing field when it comes to CPUs with high core counts. In this case we do see a slight bump in performance from the 7870K and the 7850K on both tests. We can also see that per core AMDs APUs are actually faster than their FX brothers until you get up into the higher clock speed models. I went ahead and also included the newer Cinebench R15 results as well but we currently only have the latest Intel and the 7870K on them and frankly that isn’t exactly a fair comparison.
Next in Passmark I ran the CPU bench and used the overall CPU score. This set of benchmarks tests a wide variety of individual synthetic benchmarks to get an overall performance score. The higher clock speed did keep the 7870K up above the 7850K and keeps them close to the i5-2500 that had two additional cores.
Next I wanted to get a more real world benchmark of the 7870K’s performance, to do that I used PCMark 8’s Home benchmark that does some rendering, some video playback, and word processing. I ran through using both the OpenCL benchmark as well as the conventional benchmark. My result here was a little on the weird side. The OpenCL result was great but on the conventional benchmark the rending performance was especially low, even compared to the A10-7800. I retested multiple times but with similar results each time.
Next I tested using wPrime, a great math benchmark. Here the lower the result the better. The 7870K outperformed the 7850K by a good margin and even bested results from some of the low end FX CPUs and the i5-2500K. That said the high end i7 CPUs like the 4770K still have a decent lead, but with double the cores this isn’t a huge shock.
Next I ran 3DMark Fire Strike and documented the physics scores that are dependent on the CPU performance. The 7870K did perform better than the 7850K but the performance in comparison to the 4+ core CPUs left a lot to be desired.
Last but not least I ran through a few modern games to see how the different CPUs effected the in game average FPS. In Bioshock Infinite for example the 7870K performed great, up just under the 5960X, in this case I think the high clock speed made a big difference. The same goes for Hitman where the clock speed helps but the higher core count CPUs still see a little extra performance.