What's your budget? An i3-2120 and Radeon 6850 will give you way more horsepower than an FX-4100 will. Also, using low voltage RAM is generally a bad idea - most modern motherboards you want minimum 1.5V.
your build needs help if you are gaming. You should select an i3 or i5 intel cpu. Also, do you have PSU in mind? If you are planning to SLI or xfire you will need psu that can handle that. Your mobo is a good choice but for $134 I would invest in a true gaming cpu to max out your settings. If you try that with the FX4100 you will experience poor performance