Hello. In idecad 6.53 version, it crashes frequently and closes. At first I thought that the computer does not remove it. I removed and threw the pc with centrino duo processor, 256 mb video card and 2 gb ram. I bought acer 5742 g 1 gb graphics card 3 gb ram core i5. It came very slowly and when I took a simple render in 7 hours, I gave it to someone. I bought asus n53sv core i7 4gb ram 1gb video card and it still crashes and shuts down. I think the problem is in the program. All graphics cards are nvidia. I've heard that there is a problem with ATI, but I don't understand why I live on nvidia.