The Intel Xeon E3s are for UP or uni-processor systems.
The Intel Xeon E5s are for DP or dual processor systems.
The Intel Xeon E7s are for MP or multi processor systems.
Been quite a few years and had to reregister to post but -
I'm sorry but, that's not even remotely close to correct. :thumbsdown:
Just so someone doesn't buy the wrong E series Xeon, thinking they are getting a bargain -
For ALL E series Xeons -
1000 series are unies, single socket only
2000 series are dualies, dual socket
4000 series are quads, 4 socket
8000 series are octos, 8 socket (and more with some fancy chipset work)
All are downward compatible within their socket family, i.e. E5 quads work in E5 dual sockets, E7 octos work in E7 quad or dual socket, etc.
The E3 series comes only in singles.
The E5 series comes in quads, duals and singles.
The E7 series come in duals, quads and octos.
THE difference in the E series (beyond number of sockets capability) is the socket itself -
E7 = LGA 1567 socket
E5 = FCLGA 2011 socket and FCLGA 1356 socket
E3 = FCLGA 1155 socket
E3's are Sandy Bridge
E3v2s are Ivy Bridge
E5's are a mix of Sandy Bridge EPs and ENs
E7s are all Westmere EX