What is the difference between these two processors?

[Nag Champa]

Building a system, but don't understand which of these two processors
I should get.

http://www.amdcompare.com/us-en/opteron/details.aspx?opn=OSA890CCWOF

http://www.amdcompare.com/us-en/opteron/details.aspx?opn=OSA890FAA6CC

Very grateful to anyone who could explain...

 

[Wes Newell]

Building a system, but don't understand which of these two processors
I should get.

http://www.amdcompare.com/us-en/opteron/details.aspx?opn=OSA890CCWOF

http://www.amdcompare.com/us-en/opteron/details.aspx?opn=OSA890FAA6CC

Very grateful to anyone who could explain...

The first is retail without fan (WOF). 3 yr. warranty. The second is OEM,
1 yr. warranty.