The A10-5800K is the flagship model of the Trinity series. AMD uses it to showcase the benefits of the company’s new design, so it has the maximum number of execution cores and shader processors and runs at highest clock rates. As a result, we have a quad-core APU based on two Piledriver modules with a base clock rate of 3.8 GHz and capable of turbo-boosting to 4.2 GHz. Its integrated Radeon HD 7660D graphics core has 384 shader processors and is clocked at 800 MHz.
With Turbo Core technology enabled, the APU spends most of its time at 4.0 GHz, dropping the clock rate to 1.4 GHz when idle. The clock rate is also reduced at high multithreaded loads: to 3.4 GHz rather than to 3.8 GHz as you might have expected from the specifications. It looks like the manufacturer declares an overstated base clock rate, and the rather high TDP of this model, 100 watts, doesn’t make the A10-5800K any more attractive.
Overall, the A10-5800K seems to be an APU for overclocking and benchmarking experiments rather than for everyday use, especially as it comes with unlocked frequency multipliers. You can easily increase the clock rate of its execution and graphics cores and of system memory above default levels.
The A10-5700 is the senior “normal” version of the Trinity. Its TDP is limited to a modest 65 watts, making it suitable for rather compact and energy-efficient computers. AMD had to cut down the clock rates significantly to achieve that, though. The A10-5700 works at 3.4 GHz by default and the clock rate grows no higher than 4.0 GHz in the turbo mode. The clock rate of the Radeon HD 7660D graphics core is reduced to 760 MHz, too. For all these limitations, the A10-5700 is a full-featured Trinity with all of its x86 cores and shader processors active. The lack of L3 cache is somewhat disappointing, but that’s a characteristic feature of the whole Trinity design. Each dual-core Piledriver module in the senior Trinity APUs has a dedicated 2MB L2 cache, so we have a total of 4 MB of L2 cache for the entire chip. On the other hand, it is only connected to the x86 cores and doesn’t help the graphics core or in processing shared data of heterogeneous applications.
The A10-5700 is normally clocked at 3.7 GHz but, like the A10-5800K, drops the frequency at high loads – to 3.0 GHz.
Take note that the 65-watt version of the senior Trinity lacks the letter K in its model name, meaning that this APU can only be overclocked by increasing the platform’s base clock rate. This refers not only to the x86 cores but also to the integrated graphics core and even to DDR3 memory (its speed is limited to DDR3-1866).
It is clear from its model name that the A8-5600K is a weaker variant of the Trinity APU. The difference between the A8 and the A10 series is that two out of the graphics core’s six SIMD engines are turned off in the A8. As a result, the A8-5600K offers the Radeon HD 7560D graphics core with 256 stream processors clocked at 760 MHz. The x86 cores of the A8 are no different from those of its senior cousins. They are based on two dual-core Piledriver modules with 2 megabytes of L2 cache per each module. The A8-5600K isn’t much different from its cousins in clock rates, either. Its base frequency is 3.6 GHz and can be boosted to 3.9 GHz.
In everyday applications the A8-5600K mostly works at 3.8 GHz but the clock rate is lowered to 3.2 GHz at high loads. Although the A8-5600K is closer to the A10-5700 rather than to the A10-5800K in its clock rates, its TDP is as high as 100 watts. It may have something to do with the APU’s overclocking capabilities. Being a K series model, it can be overclocked by changing frequency multipliers.