dacviet :
well i ordered the 550BE so really i just need a board that will support it and i can swap parts from my old board to the new one to play games on without much or any lag. so if i buy a new board i'll have to upgrade to ddr3 ram? will those boards even fit in my HP?
What I mean by what you need from it is what you are connecting to it. How many “parts” from your old board use the pci slots?
You only need ddr3 if you want an AM3 board. If you go with an AM2+ board like the ones I listed you can use your old ddr2 ram.
The mother board that you said your comp has is a Micro-ATX at 9.6x9.6. All the boards that I listed are Micro-ATX and slightly smaller than 9.6x9.6 so they should fit fine.
Now here is my suggestion. When you get the 550BE if it works in your board, then that’s great. If it does not; I would do one of two things return it or do an AM3 setup. The reason I say do an AM3 set up is because right now your board only supports 2gb of ram and down the line I know you are going to want to have 4gb of ram. As ddr2 ram goes away and ddr3 takes over ddr2 ram will begin to cost more and will only be able to work as fast as your old ddr2 ram. Buying ddr3 ram now will cost you about $90-$100 extra for 4gb which isn’t bad. Going with an AM3 board will make it so you can upgrade later without being in the situation you are in now.
There is one thing that I did notice about the board you have; the chipset supports raid. That means that if you change boards you need to know if raid is set up and if you would like to set it up again.