Hey just bought two sticks of 256 RAM PC133 for my G4 AGP Desktop and now that I've installed it my computer is really slow. The first time I tried booting it up after installing the RAM it froze while loading up and the second time I was able to check the system to make sure the RAM was reading and it said I had the proper amount of RAM I should have but then when I went to click out of it- it froze again.. Any quick thoughts?