NFSC

Check out the Minimum system requirements for PC.
OS: Windows 2000 SP4 / Windows XP SP2
CPU: 1.7 GHz
RAM: 512 MB RAM
Hard Disk: 4.7 GB
Optical Drive: 8x DVD/CD
Video Card: 64 MB memory and one of these chipsets is required: NVIDIA GeForce3 / NVIDIA GeForce4 (Ti series only) / ATI Radeon 8500.
Sound Card: DirectX compatible sound card
DirectX: Version 9.0c
Online Multiplayer: 512 Kbps connection; 2-8 Players
Input: Keyboard, Mouse
Optional: USB Steering Wheel / Dual Analogue Gamepad

NFSS

About 8 days before we can play Need for Speed: Shift 2 Unleashed officially (will be released on 29 March 2011 in US, on 31 March in Europe and on 1 April in UK), EA finally announced the minimum system requirements of the most anticipated racing game this year (Need for Speed ​​series). PC specifications needed to be able to play Shift 2 Unleashed with minimum conditions are not too high, dual-core processors, a video card with shader model 3.0 support and 512 MB ​​of memory, and 2 GB of RAM will be able to run this game. Okay, to learn more about system requirements (minimum) from Need for Speed: Shift 2 Unleashed, you can read below.

OS: Windows XP (SP3) or Vista (SP2) or Windows 7
CPU: Intel Core 2 Duo 2.0 GHz / AMD X2 64 2.4 GHz
RAM: 2 GB
Hard Drive: 7 GB
VGA: DirectX 9.0c Compatible 3D-accelerated 512 MB video card with Shader Model 3.0 or higher
DirectX: Version 9.0c
Keyboard, Mouse, Supported Game Controllers
Optional: USB Steering Wheel / Dual Analogue Gamepad

Supported chipsets: ATI HD 3 series or greater; NVIDIA GeForce 8 series or higher. Laptop versions of these chipsets might work but are not supported. Updates to your video and sound card drivers possibly required.

Until now, there is no information about the recommended system requirements from Need for Speed: Shift 2 Unleashed, but, at least the official minimum system requirements above can provide a complete information to you.