Felipe: The GNU compiler developers frequently use the consumer-class CPU descriptions, which can make this confusing. For example, they might call it Core i7 instead of Xeon.

To find the answer, go here:
http://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/i386-and-x86_002d64-Options.html

Code for Intel “Sandy Bridge” Xeon E5-2600 CPUs should be compiled with:
-march=corei7-avx

Code for Intel “Ivy Bridge” Xeon E5-2600v2 CPUs (listed in this post) should be compiled with:
-march=core-avx-i

Thanks for the post,

I am trying to compile a system in C with the best CFLAGS with -march options, i have Xeon E5-2630.

Do you have a tip to make this in correct way?

sorry about my english.

Thanks in advance!