Two Options for 4k Build

[Condray]

About to start on my first PC build (actually my first computer ever that isn't a laptop).  I'm trying to make one that will effectively run a 4k display with some mildly intensive games while streaming them.

 

More Expensive

http://pcpartpicker.com/user/Condray/saved/9tNBD3

    I'm pretty sure the 4790k is excessive for my needs, but I figured it'd be better for future-proofing

    Not sure if a 750w psu will be enough for overclocking on this, but I could just get a 1000w for ~$35 more

 

Less Expensive

http://pcpartpicker.com/user/Condray/saved/kf2zK8

    Not all that much to say about this other than it's cheaper

    

Case is a Rosewill Galaxy-01 for both since I bought it before doing too much research.  My guess is I'll have some cooling issues and I may switch to fully water cooled, but I'd rather not buy another case if I can avoid it.

 

Most Flexible points:

    Mobos for either build,

    Whether to use a single 980, or 970s in 2-way SLI

 

 

Main questions:

    Is the 4790k worth the extra $100 or so?

    Can a single 970 manage 4k adequately for games that don't support SLI?

    Is there any reason not to simply go for the cheapest mobo available?

[SeanBond]

2 970's for sure. Will it manage 4k? Just about...manage. Be ready to turn settings down in the more demanding titles. Not even 2 980's handle 4k very well.

[othertomperson]

2 970's for sure. Will it manage 4k? Just about...manage. Be ready to turn settings down in the more demanding titles. Not even 2 980's handle 4k very well.

 

Yeah whether you go 970, 980, or 290X, you'll want two of them.

 

I've found that turning off the frankly unnecessary AA makes even the most poorly optimised games very playable at max presets though. I find it a bit silly how relatively difficult it is to find benchmark information online that doesn't use 8x MSAA which is a ridiculous thing to suggest at this resolution.

[SeanBond]

Yeah whether you go 970, 980, or 290X, you'll want two of them.

 

I've found that turning off the frankly unnecessary AA makes even the most poorly optimised games very playable at max presets though. I find it a bit silly how relatively difficult it is to find benchmark information online that doesn't use 8x MSAA which is a ridiculous thing to suggest at this resolution.

bf4 doesn't. But that's because it's not an option 

[Condray]

That's the GPU situation decided pretty well then (It's what I was leaning towards as well)

 

So that just leaves the mobo choice and CPU choice. Although the CPU I'll most likely just go ahead and get the 4790k since the price difference is all of $90; 5% the total cost.