Again, by virtue of being an AMD APU, the Xbox One and PS4 GPUs are technologically very similar with the simple difference that the PS4 GPU is larger. In PC terms, the Xbox One has a GPU thats similar to the (entry-level) Bonaire GPU in the Radeon HD 7790, while the PS4 is outfitted with the (mid-range) Pitcairn that can be found in the HD 7870. In numerical terms, the Xbox One GPU has 12 compute units (768 shader processors), while the PS4 has 18 CUs (1152 shaders). The Xbox One is slightly ahead on GPU clock speed (853MHz vs. 800MHz for the PS4).
In short, the PS4′s GPU is on paper 50% more powerful than the Xbox One. The Xbox Ones slightly higher GPU clock speed might ameliorate some of the difference, but really, the PS4′s 50% higher CU count is a serious advantage for the Sony camp. Furthermore, Microsoft says that 10% of the Xbox Ones GPU is reserved for Kinect. Games on the PS4 will have a lot more available graphics power on tap.
Once we leave the CPU/GPU, the hardware specs of the Xbox One and PS4 start to diverge, with the RAM being the most notable difference. While both consoles are outfitted with 8GB of RAM, the PS4 opts for 5500MHz GDDR5 RAM (similar to what youd find on a modern graphics card), and the Xbox One uses 2133MHz DDR3 RAM (the same as the main RAM in your PC). This leads to an absolutely massive bandwidth advantage in favor of the PS4 the PS4′s CPU and GPU will have 176GB/sec of bandwidth to system RAM, while the Xbox One will have just 68.3GB/sec.
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