Xbox head Phil Spencer said that Microsoft was prioritizing high frame rates and faster load times over higher resolutions; the Series X achieves this via the better-matched capabilities of the CPU and graphics processing unit. Compared to the Xbox One X, the CPU is about four times as powerful and the GPU twice as powerful.

The Xbox Series X is powered by a custom 7 nm AMD Zen 2 CPU with eight cores running at a nominal 3.8 GHz or, when simultaneous multithreading (SMT) is used, at 3.6 GHz. One CPU core is dedicated to the underlying operating system. The integrated GPU is also a custom unit based on AMD’s RDNA 2 graphics architecture. It has a total of 56 compute units (CUs) with 3,584 cores, with 52 CUs and 3,328 cores enabled, and will run at a fixed 1.825 GHz. This unit is capable of 12 teraflops of computational power. The unit ships with 16 GB of GDDR6 SDRAM, with 10GB running at 560GB/s primarily to be used with the graphics system and the other 6 GB at 336 GB/s to be used for the other computing functions. After accounting for the system software, about 13.5 GB of memory will be available for games and other applications, with the system software only drawing from the slower pool. The Xbox Series X is intended to render games at 4K resolution at 60 frames per second, and can can support up to 120 frames per second and can render up to 8K resolution.

The Xbox Series X’s console form is designed to be unobtrusive and minimalistic. It has a 15.1 cm × 15.1 cm (5.9 in × 5.9 in) footprint, is 30.1 cm (11.9 in) high, and weighs 4.45 kg (9.8 lb). Designed to sit vertically, it can also be used on its side. Its front has the main power button and an Ultra HD Blu-ray drive. The top of the unit is a single powerful fan. Spencer said that the console is as quiet as the Xbox One X. The Series X includes an HDMI 2.1 output, the storage expansion slot, three USB 3.2 ports, and an Ethernet port. The console does not include an infrared blaster or HDMI pass-through like the Xbox One line, supporting HDMI-CEC instead. An earlier leak had suggested a TOSLINK port for digital audio, but this was eliminated in the final design. The console has an IR receiver in its controller pairing button next to the front USB port.

Information from Wikipedia.