Minimum System Requirements for Rivals
The developers have published the minimum system requirements that allow you to play the new NFS Rivals
Processor: Core 2 Duo E6700 2.66GHz or Athlon 64 X2 Dual Core 5800+
Video card: GeForce GT 630 1GB DDR3, Radeon HD 5570 1024MB or higher
RAM: 3 GB
DirectX: version 11.0
OS: Windows Vista (Service Pack 1) 32-bit, Windows 7 x64, Windows 8.
Hard disk space: 24 GB
Notably, the developers are now completely dropping support for DirectX 10 and earlier. So, if you really want to play, but don't have a DirectX 11-capable graphics card, you now have another reason to upgrade it.