Xbox One Architecture - Rochester Institute Of Technology

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XBOX ONE ARCHITECTUREDaniel Mason and Joonho Han

AGENDA History CPU Instruction Set Architecture GPU Memory Operating System Xbox One and PS4 Comparison Summary

HISTORY Released on November 22, 2013 Predecessors were the Xbox and Xbox 360 Eighth generation of gaming systems Utilizes backward compatibility with many Xbox 360 games Around 20 million units sold

FULL XBOX ONE ARCHITECTURE

CPU - AMD JAGUAR Runs on an AMD Jaguar APU It uses 8 x86-64 bit cores, in the form of 2 quad cores, running at 1.75 GHz. Jaguar is an improvement from its predecessor, Bobcat. The size of the L2 cache is 2MB and is shared among all of its cores as opposed to theBobcat’s 1MB cache per core. Jaguar uses 4 CPU cores instead of 2 like Bobcat. This leads to an improvement inperformance in multithreaded workloads.

BOBCAT VS. JAGUAR

ISA - X86-64 64 bit version of x86 instruction set Main features include: Pointers and long integers 64 bits long General-purpose registers expanded from 8 to 16 Much of program state held in registers rather than on stack. Better performance than traditional branching code due to conditional operations beingimplemented using conditional move instructions Floating-point operations implemented using register-oriented instruction set, rather thanstack-based approach supported by IA32

DURANGO PROCESSOR CHIP

GPU It uses is the AMD Durango graphics processor chip which uses the Graphics Core Next (GCN)architecture. Uses a 28nm process Has 768 shading units Clock speed of 853MHz The GPU core is relatively small. This is because there is a large 32MB of on-die RAM so thereis less space for the GPU.

MEMORYGPU: 8GB of DDR3 RAM 5 GB is reserved for games 3 GB is used for utility software and the operating system The memory is connected using a 256 bit memory bus Has a bandwidth of 68.2GB/s Clock speed of 1066MHzCache: 32MB of ESRAM Has a bandwidth of 109GB/s for both writes and reads

OPERATING SYSTEM Xbox One console runs on operating system that includes the Windows 10 core called OneCore. OneCore is Windows-based operating system using the Hyper-V hypervisor (VMM) and Windows 10. Hyper-V allows the Xbox One to create virtual machines on x86-64 systems. Backward compatibility to Xbox 360 games is available by emulating a virtual Xbox 360 environment on the XboxOne. With Windows 10, Universal Windows Platform apps became available on Xbox One allowing for a single app to beable to run on a variety of devices.

XBOX ONE AND PS4 COMPARISONXbox OnePS4AMD 8 core CPUAMD 8 core CPU1.75GHz CPU clock speed1.6GHz CPU clock speed8GB of DDR3 RAM8GB of GDDR5 RAM1.31 teraflop GPU1.84 teraflop GPU

SUMMARY The Xbox One CPU uses an AMD Jaguar APU. It utilizes 2 quad core modules with 4 x86-64cores on each. The memory is comprised of 8GB of DDR3 RAM and 32MB of ESRAM. The GPU runs on an AMD graphics chip codenamed Durango which uses a GCN architecture. Operating system contains three partitions, one for the Host OS, one for running applications,one for running games. Xbox One has a better CPU while the PS4 has a better graphics.

SOURCES https://www.cs.cmu.edu/ fp/courses/15213-s07/misc/asm64-handout.pdf one-back-compatibility-supports-xbox-360-dlc hardware-and-software-specs-detailed-and-analyzed -for-small-gpu kabini-temash/3 -for-small-gpu u vs-xbox-720-which-is-better-1127315/2 -specs-and-architecture/ /Xbox-One-runs-Windows-8.jpg d-runs-windows-8-virtually-indistinguishable/ https://en.wikipedia.org/wiki/Xbox One https://en.wikipedia.org/wiki/Xbox One system software he-complete-xbox-one-interview

Hyper-V allows the Xbox One to create virtual machines on x86- 64 systems. Backward compatibility to Xbox 360 games is available by emulating a virtual Xbox 360 environment on the Xbox One. With Windows 10, Universal Windows Platform apps became available on Xbox One allowing fo

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