Windows XP Minimum Specifications
OS: Windows XP with SP3
CPU: Intel Core 2 (or equivalent) running at 1.4Ghz or greater
AMD X2 (or equivalent) running at 1.8Ghz or greater
RAM: 1GB or more
Video: ATI Radeon X850 128MB or greater
NVIDIA GeForce 6600 GT 128MB or greater
DVD ROM (Physical copy)
20 GB HD space
Windows Vista Minimum Specifications
OS: Windows Vista with SP1
CPU: Intel Core 2 (or equivalent) running at 1.6Ghz or greater
AMD X2 (or equivalent) running at 2.2GHZ or greater
RAM: 1.5 GB or more
Video: ATI Radeon X1550 256MB or greater
NVIDIA GeForce 7600 GT 256MB or greater
DVD ROM (Physical copy)
20 GB HD space
Recommended Specifications
CPU: Intel Core 2 Quad 2.4Ghz Processor or equivalent
RAM: 4 GB (Vista) or 2 GB (XP)
Video: ATI 3850 512 MB or greater
NVIDIA 8800GTS 512 MB or greater
DVD ROM (Physical copy)
20 GB HD space
we need 20 gb hard disk space for this game, it is a rpg game so we can expect these requirements
SOURCE
http://kotaku.com/5293478/heres-your-dragon-age-origins-pc-specs