Buying ram for i5-4670k

Solution
I'm not going to link a specific product, but your motherboard supports a maximum memory speed of 1600. So what I'd be looking for is DDR3 1600 in a 2X4GB kit. Manufacturer is up to you. Kingston, Crucial, G Skill, all make good memory.

I didn't know where you are buying your parts or what they'll have, so these are general guidelines.
Any DDR3 1600 dual channel kits should work, most motherboards these days don't have compatibility issues anymore. I would recommend Crucial, Kingston, Mushkin, G.Skill, Corsair, etc.
 
I'm not going to link a specific product, but your motherboard supports a maximum memory speed of 1600. So what I'd be looking for is DDR3 1600 in a 2X4GB kit. Manufacturer is up to you. Kingston, Crucial, G Skill, all make good memory.

I didn't know where you are buying your parts or what they'll have, so these are general guidelines.
 
Solution