ArchiCAD nepouzivam takze len k AutoCADu. Isiel mi odjakziva aj na uplne najobycajnejsich kartach, ci uz zelenych alebo cervenych. Zelenych teda bolo viac, ale to je jedno. Samotni vyrobcovia programov sice doporucuju profesionalne karty AMD/nVidia... ale na beznu pracu bude stacit asi hocijaky mainstream, ktory sa viac zapoti pri hrani ako pri modelovani. No a prinajhorsom bude 3D model rotovat trochu trhano

A asi zalezi aj nad verziou, ktoru chce pouzivat.
Zo stranky Autodesku:
SYSTEM REQUIREMENTS:
For 64-Bit AutoCAD 2013
Microsoft Windows 7 Enterprise, Ultimate, Professional, or Home Premium (compare Windows 7 versions) or Microsoft Windows XP Professional (SP2 or later)
AMD Athlon 64 with SSE2 technology, AMD Opteron® processor with SSE2 technology, Intel® Xeon® processor with Intel EM64T support and SSE2 technology, or Intel Pentium 4 with Intel EM64T support and SSE2 technology
2 GB RAM (4 GB recommended)
6 GB free space for installation
1,024 x 768 display resolution with true color (1,600 x 1,050 with true color recommended)
Internet Explorer 7.0 or later
Install from download or DVD
Additional Requirements for 3D Modeling (All Configurations)
Pentium 4 or Athlon processor, 3 GHz or greater or Intel or AMD dual-core processor, 2 GHz or greater
4 GB RAM or more
6 GB hard disk space available in addition to free space required for installation
1,280 x 1,024 true color video display adapter 128 MB or greater, Pixel Shader 3.0 or greater, Microsoft® Direct3D®-capable workstation-class graphics card