Here's the situation. I got my brother's old desktop which is a decent system but I wanted to upgrade it some. I got a steal on an NVDIA 7800 graphics card, so I bought it. Then I realized it was PCI express and my motherboard has AGP. I thought an easy fix would be to buy a motherboard with PCI express, and swap everything to the new board. Well, when I tried to swap the CPU chip, I get stuck, the cpu is stuck to the heatsink and it will not come off. Also the sockets on the motherboards look WAY different. The old one has a grid of holes that the chip plugs into, but the new one has like a grid of little right angle tabs sticking up. When I hold my chip up to the new motherboard, the spacing of the rows is way off. This made no sense to me, since my computer supposedly had a Pentium4 processor and the new motherboard lists the P4 as a chip that it will support. WTF? klyph notes: Can I reuse my CPU on a new motherboard once it's been stuck to the heatsink? Why doesn't it look like it will plug into the socket on the new board? I've never done anything other than putting in new cards/ram so please help a n00b out.