These CPUs are often pitted against each other, however, they’re very different devices, not only in terms of architecture but also their GPU and manufacturing process.
Rockchip has gone with a smaller 28-nanometre process node on the RK3188 compared with the A31′s 40nm option, which allows Rockchip to either gain reduced power consumption or a higher clock speed for a given TDP (thermal design power). The A31 is built on ARM’s newer low-power Cortex A7 architecture, the ‘LITTLE’ in ARM’s ‘bigLITTLE’ twin-CPU strategy.
What’s interesting from a gaming perspective is Allwinner’s decision to go with PowerVR’s SGX544 MP2 graphics processor unit (GPU) instead of ARM’s stock Mali400. CNX-software has a very good comparison of the GPUs inside these chips.
At a standardised 200MHz, the SGX544 MP2 can handle 12.8GFLOPS against the Mali400′s 7.2. However, the practical difference here is that Rockchip is rumoured to have the GPU at 533MHz while Allwinner is ticking the SGX544 MP2 over at only 355MHz. That said, we believe the SGX544 MP2′s superior processing speed would still have it out in front in terms of end performance if these clock speeds are correct, even with the reduced clock speed comparison. But with its CPU cores only topping 1.2GHz, the A31 in terms of CPU speed starts at a disadvantage to the RK3188.
So in overall times of an ‘RK3188 vs A31′ comparison, the choice would depend on the application. The smaller process node potentially gives the RK3188 a lower power consumption while the SGX544 MP2 gives the A31 very good gaming graphics.
|CPU||Rockchip RK3188||Allwinner A31|
|Family Architecture||ARM Cortex A9||ARM Cortex A7|
|No of cores||4||4|
|Clock Speed||Up to 1.8GHz||Up to 1.2GHz|
|GPU||ARM Mali400||PowerVR SGX544 MP2|
|Memory Support||DDR-DDR3, 533MHz||DDR2-DDR3|
|Devices using it||Cube Pea II||Mele|
|Cube U30GT2||Onda V812|
|PIPO M8Pro||Ainol Novo 9|
|Rikomagic MK802 IV||Chuwi V99|
|Ugoos UG802B||Nextway F9X|
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