I've been using the Omni Technologies 2GB memory in my new Power Mac G5 2GHz for almost 2 weeks. Since I've been using it, it gave my PM a lot of problems. It's seem my PM was slower, it made a lot of programs freeze. Twice my PM froze when I was restarting and then the fans was getting louder, The PM had sleeping problems. All of these problems started after I install the extra 2GB of memory. This morning I took the Omni Technologies memory out of my PM and my PM seem faster . I'm returning these Omni memory and gonna buy Corsair memory.