The official page of the steam community related to the  RYSE SON OF ROME update the System requirements of this game. Ryse Son of Rome is already available for xbox one after the release of XBOX ONE and is coming to PC with more detailed gameplay regarding to the system requirements to play this game. Below you will find the three categories of requirements.

Ryse : Son Of Rome – PC Requirements Updated version

Ryse the Son of Rome

Crytek said that there was a confusion about the system requirements right after they posted the requirements for 4k gameplay on their store page and they want players to have more insight about their Systems and the game requirements which are in three categories: Minimum, Recommended and 4k.

Ryse: Son of Rome was released on Xbox on November 2013 and in August the developers have announced that it will be coming on PC, according to the page The release date for PC is October 10, but officially they said that the game will be available sometime this fall.
All the features that are included in the Xbox version, all the add-ons, all the updates like In Depth Combat and Dynamic Tile Sets will be available in the PC version.

Ryse: Son of Rome Officially announced for PC

Minimum System Requirements

CPU: Intel Dual Core with Hyperthreading or Quad Core
Example : Intel Core i3 2.8 GHz (3220T) or AMD Phenom II X4 3.2 GHz (945)
Memory: 4 GB RAM
GPU: DirectX 11 graphics card with 1GB video RAM
Examples : NVIDIA GeForce GTX 560 OraMD Radeon HD 7770
OS: 64-bit Windows (Vista, 7, 8)
HDD: 26GB

Recommended Requirements

CPU: Quad Core or Six Core
Examples: Intel Core i5 3.3 GHz (2500k) or AMD FX-6350 3.9 GHz
Memory: 8 GB RAM
GPU: DirectX 11 graphics card with 2 GB video RAM
Examples: NVIDIA GeForce GTX 660Ti or AMD Radeon 260x or 7850
OS: 64-bit Windows (Vista, 7, 8)
HDD: 26GB

Recommended Requirements for 4K

CPU : Quad Core or Eight Core
Examples: Intel Core i7 3.5 GHz (2700k) or AMD FX-8350 4.0 GHz
Memory: 8 GB RAM
GPU: DirectX 11 graphics card with 4 GB video RAM
Examples: NVIDIA GeForce GTX 780 / Titan or AMD Radeon 290x
OS: 64-bit Windows (Vista, 7, 8)
HDD: 26GB