Never had any problems with any a1200,s all have been solid my ppc amiga tower uses an old commodore amiga 1200 3.0 motherboard updated to 3.1 ive had it since about 1996 or 1997 and paid £50 pound for it.Its even survived 2 ide interface and cable burnouts caused by damage cable the a 4000 desktop i have is dodgy and is the worst amiga i have owned. :-)