I think ^ that one would be the obvious choice, but the motherboard says it support DR 1866(OC),
does that mean it will support it when it overclocks, or supports only the overclocked version. Sorry I'm not very knowledgeable with computer parts.
Both links are to the same product and yes it's fine as would be any good quality 1600/9 sticks, I'm partial to the GSkill Snipers, Ripjaws X and Tridents for the Z77 chipset (all additionally have some OC headroom)
I think one link is wrong I keep getting the same RAM kit. Which should work just fine.
Oh sorry, you're right. I updated the link. The difference between the two is that one is 8gb 1866, while the other is two 4gbs 1600.
Well the 1600 kit you will get dual channel performance from the motherboard. The 1866 you'll have to overclock your motherboard to get to that speed, or the RAM will clock down to 1600. The 1866 model is a single stick so you won't get the benefit of the Dual Channel. If you were planning on going to 16GB it would be best to use a 16GB kit since you have to overclock to get to 1866. Gaming memory Kits are for overclocking the chips have been tested under pressure to be sure they perform as identical as possible. Buying 2pcs 8GB 1866 sticks separately will not give you the same performance and may make your system less stable when you overclock. Which you will have to do to get to 1866.
Yep with a single stick you won't have dual channel so the 1600 would be the better bet, 1866 2x4GB these days is basically the same price so would go that route, and to clear things up to run 1866, NO, you won't have to OC the mobo, you'll OC the MC (memory controller) a tad which is no big deal if a K model CPU (basically all the SB and IB CPU K models can handle 2133 w/ no problem and some the 2400 and up to 2666 sticks), and again with K model CPUs it's not going to make your system unstable to run a set of 1866, (I have 32GB of 2400 sticks on my Z77)