iMac 4k - PC Equivalent

Man the choice of gpu is difficult and confusing.

Let's say I rule out the Broadwell. My initial thinking was it's the choice of Apple for video editing so it must be sufficient, built in graphics so I wouldn't have to pay extra for a separate gpu.

However, if I stump up some extra cash and move away from the iMac set up, I'm getting a more efficient system. I'm willing to look at this option, leaving the i7-5820K or i7-6700k..

A few questions.

With the i7-5820K I'm gaining 2 extra cores but a slower processor speed 3.3GHz compared to 4GHz of the newer Skylake model. From researching online, Premiere Pro and After Effects definitely take advantage of more cores.

So say I favour more cores and choose the i7-5820k, bumping the price up like you said, this impacts my choice of GPU which also in turn effects my video editing applications.

From the articles I've read online, AMD seems to be out the question due to OpenCL being new to Adobe and I've seen a few tests stating it's slower than the CUDA technology that's been around longer. I could take a risk on an AMD card since they're cheaper and on a specs front I can get more VRAM and Memory Width which are important components to Premiere, but then if the software doesn't take full advantage of GPU acceleration, then it kinda doesn't seem worth it.

So then the other option, I go for the Skylake i7-6700k. Now I gather you see this chip as a little inferior to the 5820k, but how much difference will I see between 4 cores and 6?

Also say I add a 4gb GPU (which I believe 2-4gb is ideal for 4k editing?) and take advantage of the CUDA technology for gpu acceleration, will that make up for lacking 2 less cores?

Apologies for the long post, I've probably repeated myself a bunch, there's just a lot of choice. I may be over thinking this build a little.

I want a system that's efficient at editing and rendering out 4k within Premiere. I also need a smooth and uninterrupted work flow for After Effects. I'm not OCD about rendering times, if I have to wait an extra 20 minutes but save £100+, I'll take that option.

Thanks again for your input!
 
jbrown832 said:
Man the choice of gpu is difficult and confusing.
Click to expand...

Yes. And for sure it's best to go through the headache before buying, than after.



jbrown832 said:
With the i7-5820K I'm gaining 2 extra cores but a slower processor speed 3.3GHz compared to 4GHz of the newer Skylake model. From researching online, Premiere Pro and After Effects definitely take advantage of more cores.
Click to expand...

You can bump up all 5820K's to 4.0GHz (or very near to that) or something is wrong. Plenty reach 4.2-4.5. Intel should be sympathetic with a swap if your chip can't even do say 3.8GHz.

If you're hesitant to put your faith in AMD cards being made more effective use of by your applications, then a second-hand GTX 760/770/780 (2 or 4GB, or 3 or 6GB in the latter's case) should be ideal for years. 2GB will handle it (what it won't handle is 4K gaming). You're looking at £60-£150 here. And if you get your hands on an EVGA with plenty of remaining warranty, they'll honour it even if ownership of the card has changed (but do check for details of this as there may be some requirements to fulfill). I would avoid the new 9XX series as it seems Nvidia are gimping CUDA functionality on them (to make their Quadros more appealing). Or at least research more into how they presently compare at video editing (for example a 960 v 770).

Otherwise I'd go for Skylake and no GPU to begin with. It's unlikely that you won't be tempted to increase graphics speed in the next few years. And it makes for a cost-effective upgrade. At which point the "50/50" between the Broadwell and Skylake definitely tips in the latter's favour.

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http://techgage.com/article/intels-skylake-core-i7-6700k-a-performance-look/
 
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