Is it really worth it for the 430 extra watts....i'm seriously considering it.
Z-680 - 265$ - 500 watts
http://www.newegg.com/app/viewproductdesc.asp?description=36-121-105&DEPA=0
Z-640 - 55$ - 70 watts
http://www.newegg.com/app/ViewProductDesc.asp?description=36-121-104&depa=0
Z-680 - 265$ - 500 watts
http://www.newegg.com/app/viewproductdesc.asp?description=36-121-105&DEPA=0
Z-640 - 55$ - 70 watts
http://www.newegg.com/app/ViewProductDesc.asp?description=36-121-104&depa=0