Compute Performance

With Haswell, Intel enables full OpenCL 1.2 support in addition to DirectX 11.1 and OpenGL 4.0. Given the ALU-heavy GPU architecture, I was eager to find out how well Iris Pro did in our compute suite.

As always we'll start with our DirectCompute game example, Civilization V, which uses DirectCompute to decompress textures on the fly. Civ V includes a sub-benchmark that exclusively tests the speed of their texture decompression algorithm by repeatedly decompressing the textures required for one of the game’s leader scenes. While DirectCompute is used in many games, this is one of the only games with a benchmark that can isolate the use of DirectCompute and its resulting performance.

Compute: Civilization V

Iris Pro does very well here, tying the GT 640 but losing to the 650M. The latter holds a 16% performance advantage, which I can only assume has to do with memory bandwidth given near identical core/clock configurations between the 650M and GT 640. Crystalwell is clearly doing something though because Intel's HD 4600 is less than 1/3 the performance of Iris Pro 5200 despite having half the execution resources.

Our next benchmark is LuxMark2.0, the official benchmark of SmallLuxGPU 2.0. SmallLuxGPU is an OpenCL accelerated ray tracer that is part of the larger LuxRender suite. Ray tracing has become a stronghold for GPUs in recent years as ray tracing maps well to GPU pipelines, allowing artists to render scenes much more quickly than with CPUs alone.

Compute: LuxMark 2.0

Moving to OpenCL, we see huge gains from Intel. Kepler wasn't NVIDIA's best compute part, but Iris Pro really puts everything else to shame here. We see near perfect scaling from Haswell GT2 to GT3. Crystalwell doesn't appear to be doing much here, it's all in the additional ALUs.

Our 3rd benchmark set comes from CLBenchmark 1.1. CLBenchmark contains a number of subtests; we’re focusing on the most practical of them, the computer vision test and the fluid simulation test. The former being a useful proxy for computer imaging tasks where systems are required to parse images and identify features (e.g. humans), while fluid simulations are common in professional graphics work and games alike.

Compute: CLBenchmark 1.1 Computer Vision

Compute: CLBenchmark 1.1 Fluid Simulation

Once again, Iris Pro does a great job here, outpacing everything else by roughly 70% in the Fluid Simulation test.

Our final compute benchmark is Sony Vegas Pro 12, an OpenGL and OpenCL video editing and authoring package. Vegas can use GPUs in a few different ways, the primary uses being to accelerate the video effects and compositing process itself, and in the video encoding step. With video encoding being increasingly offloaded to dedicated DSPs these days we’re focusing on the editing and compositing process, rendering to a low CPU overhead format (XDCAM EX). This specific test comes from Sony, and measures how long it takes to render a video.

Compute: Sony Vegas Pro 12 Video Render

Iris Pro rounds out our compute comparison with another win. In fact, all of the Intel GPU solutions do a good job here.

3DMarks & GFXBenchmark Quick Sync & CPU Performance
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  • jasonelmore - Sunday, June 2, 2013 - link

    Looking at the prices, this will raise the price or Lower the margins of the 13" Retina Macbook Pro by about $150 each. Reply
  • mschira - Sunday, June 2, 2013 - link

    Yea laptops benefit most - good for them.
    But what about the workstation?
    So intel stopped being a CPU company and turned into a mediocre GPU company? (can even beat last years GT650M)
    I would applaude the rise in GPU performance if they had not completely forgotten the CPU.
    M.
    Reply
  • n13L5 - Monday, June 3, 2013 - link

    You're exactly right.

    13" ultrabook buyers who need it the most get little to nothing out of this.

    And desktop users don't need or want GT3e and it uses system RAM. Better off buying a graphics card instead of upgrading to Haswell on desktops.
    Reply
  • glugglug - Tuesday, June 4, 2013 - link

    While I agree this misses "where it would benefit most", I disagree on just *where* that is.

    I guess Intel agrees with Microsofts implicit decision that media center is dead. Real-time HQ quicksync would be perfect to transcode anything extenders couldn't handle, and would also make the scanning for and skipping of commercials incredibly efficient.
    Reply
  • n13L5 - Tuesday, June 11, 2013 - link

    Core i5…4350U…Iris 5000…15W…1.5 GHz
    Core i7…4550U…Iris 5000…15W…1.5 GHz
    Core i7…4650U…Iris 5000…15W…1.7 GHz

    These should work. The 4650U is available in the Sony Duo 13 as we speak, though at a hefty price tag of $1,969
    Reply
  • Eric S - Monday, July 1, 2013 - link

    The last 13" looks like they were prepping it for a fusion drive then changed their mind leaving extra space in the enclosure. I think it is due for an internal redesign that could allow for a higher wattage processor.

    I think the big deal is the OpenCL performance paired with ECC memory for the GPU. The Nvidia discrete processor uses non-ECC GDDR. This will be a big deal for users of Adobe products. Among other things, this solves the issue of using the Adobe mercury engine with non-ECC memory and the resulting single byte errors in the output. The errors are not a big deal for games, but may not be ideal for rendering professional output and scientific applications. This is basically a mobile AMD FireGL or Nvidia Quadro card. Now we just need OpenCL support for the currently CUDA-based mercury engines in After Effects and Premiere. I have a feeling that is coming or Adobe will also lose Mercury Engine compatibility with the new Mac Pro.
    Reply
  • tviceman - Saturday, June 1, 2013 - link

    Impressive iGPU performance, but I knew Intel was absolutely full of sh!t when claiming equal to or better than GT 650m performance. Not really even close, typically behind by 30-50% across the board. Reply
  • Krysto - Saturday, June 1, 2013 - link

    When isn't Intel full of shit? Always take what the improvements they claim and cut it in half, and you'll be a lot closer to reality. Reply
  • xtc-604 - Saturday, June 8, 2013 - link

    Lol...you think that's bad? Look at Apple's claims. "over 200 new improvements in Mountain Lion" Reply
  • piroroadkill - Saturday, June 1, 2013 - link

    sh<exclamation point>t? What are we? 9? Reply

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