On 2007.06.25, at 19:14, Stefan wrote: > But after restart the system crashes after a while of usage regularly. > I tried it with two installations. > > > Who has ideas what I can do/try? > > I changed the RAM-modules within this cube (but didn't try others). > That made no difference. > > How probably is RAM as reason? I'd bet on the RAM. Try using the RAM modules from other Cube, or you can try hardware test cd... > 2) How fast will the cube with 450 MHz be? > (My other is 1,5 GHz fast, I don't remember how it was. And it was > an older OS-X, of course) Well, 10.4.10 seems to work acceptably well for me on 450 MHz Cube.