Go with the SL7PW. Its just the newer revision from the first one. So it should be cooler and get you so more mhz
http://processorfinder.intel.com/det...px?sSpec=SL7J7
http://processorfinder.intel.com/det...px?sSpec=SL7PW
http://processorfinder.intel.com/det...px?sSpec=SL7J7
http://processorfinder.intel.com/det...px?sSpec=SL7PW