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Quote Originally Posted by Xbox Wire
[...] At the heart of the Xbox Series X is our custom processor leveraging the latest RDNA 2 and Zen 2 architectures from our partners at AMD to deliver a best in class next generation processor delivering more than 12 TFLOPs of GPU power and more than 4 times the CPU processing power of the Xbox One X. Xbox Series X includes the highest memory bandwidth of any next generation console with 16GB of GDDR6 memory, including 10GB of GPU optimized memory at 560 GB/s to keep the processor fed with no bottlenecks. [...]

The Xbox Velocity Architecture comprises four major components: our custom NVME SSD, hardware accelerated decompression blocks, a brand new DirectStorage API layer and Sampler Feedback Streaming (SFS).

Let’s dive deep into each component:

- Custom NVME SSD: The foundation of the Xbox Velocity Architecture is our custom, 1TB NVME SSD, delivering 2.4 GB/s of raw I/O throughput, more than 40x the throughput of Xbox One. [...]

- Hardware Accelerated Decompression: [...] Assuming a 2:1 compression ratio, Xbox Series X delivers an effective 4.8 GB/s in I/O performance to the title, approximately 100x the I/O performance in current generation consoles. To deliver similar levels of decompression performance in software would require more than 4 Zen 2 CPU cores.

- New DirectStorage API: [...] We added a brand new DirectStorage API to the DirectX family, providing developers with fine grain control of their I/O operations empowering them to establish multiple I/O queues, prioritization and minimizing I/O latency. [...]

- Sampler Feedback Streaming (SFS): [...] This innovation results in approximately 2.5x the effective I/O throughput and memory usage above and beyond the raw hardware capabilities on average. [...]

Through the massive increase in I/O throughput, hardware accelerated decompression, DirectStorage, and the significant increases in efficiency provided by Sampler Feedback Streaming, the Xbox Velocity Architecture enables the Xbox Series X to deliver effective performance well beyond the raw hardware specs, providing direct, instant, low level access to more than 100GB of game data stored on the SSD just in time for when the game requires it. These innovations will unlock new gameplay experiences and a level of depth and immersion unlike anything you have previously experienced in gaming. [...]