I hate to post the same warning that is in every other thread about ES processors, but I feel like it's still necessary in case someone stumbles across this post...
These processors are ENGINEERING SAMPLES. They will work identically to the final retail version (almost always), but some motherboards do not like to support processors that aren't specifically allowed in their "approved processors" listings that are part of the BIOS configuration.
Please make absolutely sure that your motherboard has compatibility with this processor before you dive in.