Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.


macrumors member
Original poster
Jul 28, 2010
The Netherlands
So I got a small upgrade, going from dual X5680's to dual X5690, all is working well butt....

Under Windows when I run CPU-Z there is a difference in specification between sockets, one has ES after the cpu name. I did not know what it meant and looked it up. It seems like ES stands for Engineering Sample and it is illegal to sell those because they are property of Intel.

Did anyone else get a ES and did you run in to problems along the road? I bought it in a pair on eBay, and it is nowhere mentioned that it is a ES.

Just let it be, or let them send a other one?

Socket 1:

Socket 2:
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.