Title says it all. I'm totally lost when it comes to what RAM and motherboard to get for an i5 4670K ($265). I'm thinking 8GB-16GB, but beyond that I have no clue. I'd like to SLI and overclock down the road. Also I've had good success with Kingston RAM, and with Gigabyte/ASUS boards, but I'm open to suggestions.
The above post has answered your question. I would like to add that it is better to go with 2 x 4GB or 2 x 8GB instead of 4 x 4GB or 4 x 2GB modules. The latter setups run causing extra stress to the memory controller.