Specification is fully enough to play latest games.
For autocad preferred system requirements:
* Intel® Pentium® 4 or later, with 2.8 GHz or a faster processor (e.g. Intel® Pentium® M 1.8GHz for Laptop) and with at least 1MB total Cache
* 1.5 GB or more RAM
* 2 GB of free disk space not including installation
* 128 MB or more Open GL work-station class graphics card or DirectX 9 support
So it will be fully enough.
Only one thing I will recomend to you is to upgrade motherboard - because ECS motherboards are cheap range.