I can't figure out the difference between these. Can anybody figure this out? They essentially have the same specs.

http://www.newegg.com/Product/Product.asp?Item=N82E16819116175
http://www.newegg.com/Product/Product.asp?Item=N82E16819116175R

There's also an RoHS version of it for $82, although I know that uses less power than the others.

One is open box and one is OEM. Thats it. They have the same model number.

The RoHS version uses the same power as the other ones but it has less lead. Personally I don't like RoHS components because the lack of a lead coating on electrical contacts increases the possibility of "tin wiskers" small fragments of metal from contacts that can cause a short, electrical current can cause these "wiskers" to be come longer so even if the component works initially these "tin wiskers" may cause future problems.

one is open box..which there is not a waranty...and its cheaper..i got a open box from them..it come with nothing though..no fans, papers, anything..just the cpu
but i woulnnt get the open box because after shipping the open box will just be 5 dollars less..

I'll probably get the New one, although I need help finding a cooler (there are so many of them). In my experiences with building computers, I have never had to pick out a fan, so....

here are some good coolers. (with a prescott you'll need a good cooler)

http://www.newegg.com/Product/Product.asp?Item=N82E16835118112
http://www.newegg.com/Product/Product.asp?Item=N82E16835103157
http://www.newegg.com/Product/Product.asp?Item=N82E16835118114
http://www.newegg.com/Product/Product.asp?Item=N82E16835106061

I also recomend some Artic Silver thermal compound
http://www.newegg.com/Product/Product.asp?Item=N82E16835100007

Thank you for the reply!