First here are my specs * Processor Two 2.26GHz Quad-Core Intel Xeon Nehlam * Memory 12GB (6X2GB) * Graphics Card ATI Radeon HD 4870 512MB * Hard Drive Bay1 1TB 7200-rpm Serial ATA 3Gb/s * Plus 3 extra 1TB hard drives 2 striped 1 dedicated to windows I've had my computer for about 2-3 years and in the last year it has slowly gotten slower and slower. I wasn't around for most of the summer but my girlfriend complained about browser freezing and finder crashing. When I came home, I found my computer would only work with a specific external hard drive attached. When I detached the hard drive the whole machine would turn off and a loud clicking noise could be heard. Once the drive was reattached the computer would boot up fine. I tried reloading the OS, but that didn't work. Neither did zapping my pram. I eventually turned off the machine and now it won't boot up at all. I turn it on and I get the grey screen with the apple. The loading circle appears and after a few rotations my kernel crashes every time. I have no clue whats going on. I have a sneaking suspicion girlfriend left my computer on all summer in the heat and fried the Ram. I want to get more Ram and hope that's the problem but I'm at a loss and I'm trying to prevent a huge repair bill. SUGGESTIONS PLEASE!!!!!!!!!!