Cpu waterblock material

I'm looking around for a water block for my new x99 build and after looking at EK's site, I saw that they have water blocks made out of different materials. I was wondering which of these materials is the best or have the lowest temps. Thanks for the help.

Copper has the highest thermal conductivity. I would say nickel plated copper would be the best.



The nickel doesn't actually help the temps but rather prevents <s>corrosion</s> oxidation*. Which when dealing with water is a good idea.

Edit: mixed two terms up.

Explanation, Nickel is more for looks and to prevent oxidation, if you have copper and nickle in a water loop you'll actually get more corrosion issues.

Source, in case you want some back up proof.

Thanks for the help.