just get the memory that is on crucial.com if it does not work they will take it back and give you all your money back, with no restocking fee.
But if it says thats the memory that you need then, it is correct. crucial memory is the most compattable memory on the planet, so it works with everything. don't worry, it will work.
your processor is fine, all you need is some more memory and a better video card. but if you want you can even do a processor upgrade for not that much http://www.newegg.com/Product/Product.asp?Item=N82E16819103417 for $96 you can go to a 2600+.
if your just selling the xbox 360 with no games then the average sale is for $600-$700 if you give game and extras wit it then you will get more depending on what you give with it.
REV0LUTI0NIZED do this its what i have done to get a netgear router and a linksys router to work togeather, take a regular eathernet cable and plug it into port 4 on your first router say it the dlink then plug the other end into the wan on the linksys router, that's it the linksys wll get a ip from the dlink and will be able to get internet on it and transfer files back in forth from both routers with no problem.
This dude who made this did a very good job its a real fun game, ive been playing it for about a hour 1/2 now and i like it.
you can download it here http://imagehouze.com/uploader/files/halozero.zip
Give it a try... :D
check this out, graphics card manufactures are getting a little out of hand with this new venture they are going into.
http://www.tomshardware.com/2005/12/14/sneak_preview_of_the_nvidia_quad_gpu_setup/