you _know_ that you can't run all the shadow and parallax thingies on a FX 5200. but the truth behind that statement is: it requires at least a shader 2.0 card. i'd say you need a GF 6800 to get a decent quality and speed.

shivas rquirements: Intel Pentium II 450Mhz or AMD K6 450Mhz, 512 megabytes (MB) of RAM, 3D Accelerated Graphics Card with 32MB RAM minimum
of course this is too low too, but i tested it on a GF4MX (DX7) card. the engine automatically reduces the rendering quality, shaders fall back or switch off. it really scales. recommended are a dual core 3800+ and a recent 128mb 3d accelerator. pretty much the same what i'd recommend for c4.

i'd really love to see a comparison between a7 and shiva with zwecklos' architectural scene. if you accept that direct comparison and download the free stonTools (dae exporter) for 3ds max, i'd be willing to drop your exported models into shiva, assign the materials, and make an online demo.