AMD's Path to Polaris

With the benefit of hindsight, I think in reflection that the 28nm generation started out better for AMD than it ended. The first Graphics Core Next card, Radeon HD 7970, had the advantage of launching more than a quarter before NVIDIA’s competing Kepler cards. And while AMD trailed in power efficiency from the start, at least for a time there they could compete for the top spot in the market with products such as the Radeon HD 7970 GHz Edition, before NVIDIA rolled out their largest Kepler GPUs.

However I think where things really went off of the rails for AMD was mid-cycle, in 2014, when NVIDIA unveiled the Maxwell architecture. Kepler was good, but Maxwell was great; NVIDIA further improved their architectural and energy efficiency (at times immensely so), and this put AMD on the back foot for the rest of the generation. AMD had performant parts from the bottom R7 360 right up to the top Fury X, but they were never in a position to catch Maxwell’s efficiency, a quality that proved to resonate with both reviewers and gamers.

The lessons of the 28nm generation were not lost on AMD. Graphics Core Next was a solid architecture and opened the door to AMD in a number of ways, but the Radeon brand does not exist in a vacuum, and it needs to compete with the more successful NVIDIA. At the same time AMD is nothing if not scrappy, and they can surprise us when we least expect it. But sometimes the only way to learn is the hard way, and for AMD I think the latter half of the 28nm generation was for the Radeon Technologies Group learning the hard way.

So what lessons did AMD learn for Polaris? First and foremost, power efficiency matters. It matters quite a lot in fact. Every vendor – be it AMD, Intel, or NVIDIA – will play up their strongest attributes. But power efficiency caught on with consumers, more so than any other “feature” in the 28nm generation. Though its importance in the desktop market is forum argument fodder to this day, power efficiency and overall performance are two sides of the same coin. There are practical limits for how much power can be dissipated in different card form factors, so the greater the efficiency, the greater the performance at a specific form factor. This aspect is even more important in the notebook space, where GPUs are at the mercy of limited cooling and there is a hard ceiling on heat dissipation.

As a result a significant amount of the work that has gone into Polaris has been into improving power efficiency. To be blunt, AMD has to be able to better compete with NVIDIA here, but AMD’s position is more nuanced than simply beating NVIDIA. AMD largely missed the boat on notebooks in the last generation, and they don’t want to repeat their mistakes. At the same time, starting now with an energy efficient architecture means that when they scale up and scale out with bigger and faster chips, they have a solid base to work from, and ultimately, more chances to achieve better performance.

The other lesson AMD learned for Polaris is that market share matters. This is not an end-user problem – AMD’s market share doesn’t change the performance or value of their cards – but we can’t talk about what led to Polaris without addressing it. AMD’s share of the consumer GPU market is about as low as it ever has been; this translates not only into weaker sales, but it undermines AMD’s position as a whole. Consumers are more likely to buy what’s safe, and OEMs aren’t much different, never mind the psychological aspects of the bandwagon effect.

Consequently, with Polaris AMD made the decision to start with the mainstream market and then work up from there, a significant departure from the traditional top-down GPU rollouts. This means developing chips like Polaris 10 and 11 first, targeting mainstream desktops and laptops, and letting the larger enthusiast class GPUs follow. The potential payoff for AMD here is that this is the opposite of what NVIDIA has done, and that means AMD gets to go after the high volume mainstream market first while NVIDIA builds down. Should everything go according to plan, then this gives AMD the opportunity to grow out their market share, and ultimately shore up their business.

As we dive into Polaris, its abilities, and its performance, it’s these two lessons we’ll see crop up time and time again, as these were some of the guiding lessons in Polaris’s design. AMD has taken the lessons of the 28nm generation to heart and have crafted a plan to move forward with the FinFET generation, charting a different, and hopefully more successful path.

Though with this talk of energy efficiency and mainstream GPUs, let’s be clear here: this isn’t AMD’s small die strategy reborn. AMD has already announced their Vega architecture, which will follow up on the work done by Polaris. Though not explicitly stated by AMD, it has been strongly hinted at that these are the higher performance chips that in past generations we’d see AMD launch with first, offering performance features such as HBM2. AMD will have to live with the fact that for the near future they have no shot at the performance crown – and the halo effect that comes with it – but with any luck, it will put AMD in a better position to strike at the high-end market once Vega’s time does come.

The AMD Radeon RX 480 Preview The Polaris Architecture: In Brief
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  • PeckingOrder - Wednesday, June 29, 2016 - link

    What a massive F-up by AMD. Reply
  • evolucion8 - Wednesday, June 29, 2016 - link

    Sure, cause AMD midrange GPUs are meant to replace previous high end of GPUs lol Reply
  • ddriver - Wednesday, June 29, 2016 - link

    In the chart, the AMD Radeon RX 480 (4GB) is listed as having 8 gigs of vram. Reply
  • ddriver - Wednesday, June 29, 2016 - link

    I mean the "AMD Radeon GPU Specification Comparison" chart. Reply
  • SunnyNW - Wednesday, June 29, 2016 - link

    Ryan Shrout of PCper said Every RX480 actually has 8GB of memory on the board..Like WTF...He further added that they sent bios to switch the cars between 4GB and 8GB. I understand the artificial prodcuct segmentation that often happens in tech but with the large number AMD hopes to sell that is A LOT of wasted memory! WOW what a waste they should have just had 8GB reference only and priced it 10 to 15 bucks less... Reply
  • Drumsticks - Wednesday, June 29, 2016 - link

    This is only for the press. The retail 4GB cards have 4GB of VRAM, per the AMA on reddit. Reply
  • akamateau - Wednesday, June 29, 2016 - link

    4 and 8gb are currently being released.

    Amazon here:

    https://www.amazon.com/XFX-Radeon-Graphics-Cards-R...

    Newegg here:

    http://www.newegg.com/Product/Product.aspx?Item=N8...
    Reply
  • akamateau - Wednesday, June 29, 2016 - link

    2 RX 480 CRUSHES GTX 1080 for $200 less!!! Reply
  • basroil - Wednesday, June 29, 2016 - link

    "2 RX 480 CRUSHES GTX 1080 for $200 less!!!"

    That's if any motherboards even support that configuration! Tests have shown that the card:
    1) Draws closer to 165W, much higher than it's actual supported maximum power draw of 150W
    2) ~80W of that is from the PCIe slot itself. Motherboards are only required to allow 75W for ALL PCIe slots. Either way it will overload the traces on cheaper boards.

    Put those together and you have a nightmare fuel of either frying the mobo with >150W draw when even 2x1080 wouldn't hit 75W, or frying your PSU as the cards reroute power to the PCIe power cable and overload the 75W capable 6pins with double their rated amperage.
    Reply
  • binarydissonance - Wednesday, June 29, 2016 - link

    Or both the mobo and the PSU are supplying the same voltage and the power input is combined into a single bus... y'know... preventing the unlikely scenario you describe from ever possibly happening. Reply

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