Hi, I am looking for someone that is experienced/knowledgable in Mac hardware and able to work with me remotely. I have two G5 Mac OSX's and use them for video and editing work, but both are having similar issues. They have slowed down quite a bit. My encoding time has quadrupled if the project doesn't glitch or fail, the computers make scratch noises and sometimes going through Finder windows take a long time. The work at hand doesn't use up enough CPU on the 8-core processors to slow it down. I've run a few diagnostics test and they all say the computers are fine, confusing me more. Thanks!