Hello, On some forum someone pointed me to a list for optimizing gcc compilation (for example: http://www.freehackers.org/gentoo/gccflags/flag_gcc3.html). For some reason I can't seem to find the right options for my cpu. It's an AMD Athlon 64 3000+, currently used in a 32bits Ubuntu system. I'm using gcc v4.0.3. Do you have any suggestions on which options to use? Because at the moment I'm not really sure which to use. Thanks for your time, Theimon.