hi everyone, im trying to upgrade my processor, i currently have a e2180. i have looked around and people have told me to upgrade to a e8400 and others say e8500. I would really like to know what is the difference between these two and if they are compatible with my computer. the computer i have is a acer am1641-u1521a and the motherboard is a nvidia mcp73. i found that my motherboard is a 775 socket type and the two processors suggested to me are 775 socket type. but like i said, would it be compatible? i could really use some advice, ty