I'm building a new system and i cant decide on ram.
I was thinking of corsair dominator ram but i don't know if it is compatible with a AMD fx 8350 and a MSI 990fxa gd60. and if it isn't do you have any other recommendations for RAM or what id have to use make it compatible
You could always check the compatibility list of the motherboard manufacturer. Though in general RAM compatibility isn't a big problem anymore, it's safest to avoid memory that requires higher than normal voltages to run at spec. For DDR3 the standard voltage is 1.5V.
gskillls run at 1.6v and they are fine.