Hi all - I'm trying to help out a friend here - he has a stock Early 2008 Mac Pro (Dual Quad-Core Xeon, 2.8 GHz) with stock 2GB RAM (1+1 GB). We just installed an additional 8 GB (4+4) from Newegg.com, and the problem is that the Mac Pro system profiler now recognizes only the new RAM but not the old RAM; System Profiler states that the Mac has 8 GB (it's supposed to state 10 GB). We used a chart from Apple's website to make sure the sticks are installed properly in the right slots. Any ideas about why the Mac isn't recognizing the original two sticks anymore? I appreciate it - thanks !