I have a problem with my PowerMac G5, so lets see if some of you can point me in the right direction! Model is the powerpc(powermac) g5 dual 1.8ghz It's running OS X Tiger It boots fine and what not but after a little while of use it randomly freezes up and I have to hold down the power button to get it to turn off. It had 4g of RAM installed and I pulled all the third party RAM out leaving 2g of apple RAM so I'm pretty sure I can rule out the RAM as the issue. Any one have any idea what the problem could be or at least a direction they can point me in?! Thanks guys!