It is a homework project and I'm lost!! Thanks
All right mate, i don't support "cheating" per se, but i'll give you some help here.
Here are two links.
The intel link is for 3 boards that meet all the requirements you listed. These are all based off the LGA 1366 socket
. CLICK HERE!
Now it's up to you to choose one of these boards and select the processor. I'm not going to do the project for you mate =P.
To find the right processor make sure you look for one that fits in the LGA 1366. This would typically be a quad-core i7.
Now this second link is for the AMD platform, based of the AM3 Socket
. Look for a processor that was made for the AM3 socket. A Phenom II quad-core would fit nicely here. CLICKY HERE!
Keep in mind that to make sure the motherboard you select will support the CPU you select you will need to check the "CPU Support list" on the board's manufacturer website. (ie. For the Asus board you will visit http://support.asus.com
Also all of these boards support DDR3 but you can also verify if they are compatible just like the cpu support list except it will be a "Memory Support List".
If you need any more clarification let me know. =)