Intel 6700 or 5820 or 4790?

[Morne]

Hi guys

I'm speccing a new pc and need best rendering/price/performance ratio I'm looking at either the 6700 or 5820 or 4970. Locally the 5820 is about 18% more expensive than the 6700, but I'm not sure about the rendering performance. Which of these will perform better? (and will all 3 support 64GB Ram?)

Any other suggestions?

[chriserskine]

5820, 2 more cores, you can overclock it well.

and you can fit a max of 128gb vs 64 vs 32.

[Morne]

Yes I'm hoping to get
i7 5820
Asus X99
64GB of corsair vengance
80i Corsair liquid cooling
GTX 970 (or 980)
still thinking about the rest...