Currently own a Dell OptiPlex GX1 with a 400MHz processor (came with the system) and the latest BIOS revision (A09). Anyway, I just bought a P3/600MHz processor to upgrade to. Once I correctly remove the 400 and insert the 600, turn the power on... and nothing! not even the BIOS loads! what does this sound like? something bad? I went to Dell's support and the GX1 system I have is able to be upgraded to a max of a P3/600MHz. So what's the deal?