What software are you rendering out of; doesn't sound like Poser to me. 128 mb will render in Lightwave with no problem. A lot depends on your system clock speed, and a lot depends on the software, and finally, it depends on what you're trying to render. If you're going for hi-res stuff with lot's of transparency and refraction then it's gonna take a long time. Your system may not have locked up, it just may be taking so long between instructions that everything stops, including the update to the system clock, etc. We used to have that problem on the old SGI's with Wavefront. They were still churning away, you just could tell they were churning away.