I am building a gaming computer and cannot decide which processor to use. My first choice is the i3 firstname.lastname@example.org GHz. It is obvious that I can't overclock this. My second choice is a Phenom II that I could overclock to around 4GHz. Which is better? Pros and cons?
More aboutwhich better 2120 phenom overclocked
Depends on which phenom, though i3 will have a much better upgrade path as you can upgrade to a higher end sandybridge or a higher end ivybridge cpu with a z68 board. It also depends on your entire budget and what you want to use this system for. Here is a comparison of the i3-2100 and the phenom 965: http://www.anandtech.com/bench/Product/289?vs=102
the phenom OC will be faster but draw more power and also have less of an upgrade path.