Thank's for all your answers. I also ask e-frontier technical support! They write me that the hardware is good enough for Poser 6. Yesterday I got my new Poser 6 Version, but the OpenGL- Preview is much slwoer as in Poser 4 with Sreed. So I try today to switch. They also say, the RAM is very important, because the dynamic-system runs further in software not in opengl-performance. e-Frontier said, that there is a also a SP1 for Poser 4, that allows the system to use all the RAM-Capacity. It could give you a bit better preview speed! If I want to use the opengl (in my new Poser 6) better, I think also a big RAM on graphikcard would be fine, or? Than I saw (with the Performance-Window) in Poser 4.03 the Cachememory must work hard and the CPU works, if you turn a scene in Poser in your preview, at 50%. If the scene stops it works with about 13-30% performance. If I ended Poser the CPU works with 1-5%! Maybe an increasing of the cachememory could give better speed?! But very few people increase the prossoor-near cache-Memory from for exemple 512 kByte to 1 MB, even if it's possible. But it's expensive anyway. I have also a SCSI-System Ultrawide harddrive, but the hardrive is too small for the whole runtime-libaray. I think here is S-ATA II the next generation. The industry works on a harddrive with more than 1000 small write/read-Heads. This will be bring a real high troughput and accesstime, but that's future at time. -I will check out the RivaTuner and look how it works. Thank's for the tip. Regards, Roger