DX11 vs DX12 Intel 6700K vs 6950X Framerate Scaling

This is our fourth and last installment of looking at the new DX12 API and how it works with a game such as Ashes of the Singularity. We have looked at how DX12 is better at distributing workloads across multiple CPU cores than DX11 in AotS when not GPU bound. This time we compare the latest Intel processors in GPU bound workloads.


Benchmark Testing Focus

If you have read our last few articles, we have spent a lot of time looking at the overall averages in our benchmarks, and we also looked at a lot of situations that were nowhere close to real world settings that most gamers would be using. This time around we have updated our CPUs as discussed below, but we have moved to a more "real world" type of scenario that hardware enthusiasts are more likely to be using in terms of clocks and IQ settings. We will concentrate on the "Crazy" IQ preset as well as 1440p resolution. These AotS benchmarks will be 98% to 100% GPU bound, so our data will look a lot different this time.

Also instead of just showing you the overall average benchmark score, we broke down the data a bit more. When the AotS benchmark delivers its data, it shows the average framerate score that is derived from Normal, Medium, and High game workloads. Going through these all the benchmarks the last couple of months I saw some interesting data not truly revealed when just looking at the average of the three tests. We are going to be looking at Normal and Heavy presets today and discussing those benchmarks.

Test Setup and Reasoning

Our system configuration for this testing is below, and likely a bit different than you have seen in awhile.

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For our tests last month using our AMD CPU, we were focused on looking at results that were very much CPU bound, but we also wanted to have a lot of cores at our disposal. In our second article, we wanted to again look at CPU bound results with our Intel CPU. In our third installment we looked at clock for clock differences between the Haswell and Haswell-E processors.

For THIS ARTICLE we wanted to simply look at today's fastest and most recent processors, the Core i7-6700K (Skylake 4C/8T) and the Core i7-6950X (Broadwell-E 10C/20T). We have kept both processors clocked the same at 4.3GHz with 2666MHz DDR4 Corsair memory with the same timings and footprint at 16GB.

Worth mentioning is that AotS benchmark scores using 8GB of memory can be as much as 10% slower than a 16GB system. Something to keep in mind looking around at other benchmarks.

I used the latest WHQL drivers from NVIDIA's and AMD's websites; version 368.39 from NVIDIA, and version 16.15.2211 from AMD.

For setting our processor clocks we simply locked both CPU's multipliers at 43 and hand set our memory at 2666MHz.

So again, like we did last time, we are going to run through the Ashes of the Singularity benchmarks and graph all the data and see how it looks in mostly GPU bound scenarios.