Personal Profile

Multi-GPU DirectX 12 shootouts show AMD with performance lead over Nvidia

One of the most exciting parts of Microsoft’s DirectX 12 API is the ability to pair graphics cards of varying generations, performance, or even manufacturers together in a single PC, to pool their resources and thus make games and applications run better. Unfortunately, testing “Explicit Multi Adaptor” (EMA) support under real-world conditions (i.e. not synthetic benchmarks) has so far proven difficult. There’s only been one game designed to take advantage of DX12’s numerous low-level improvements—including asynchronous compute, which allows GPUs to execute multiple command queues simultaneously—and the early builds of that game didn’t feature support for multiple GPUs.

Multi-GPU DirectX 12 shootouts show AMD with performance lead over Nvidia

Multi-GPU DirectX 12 shootouts show AMD with performance lead over Nvidia

 

As you might have guessed from the headline of this story, it does now. The latest beta version of Stardock’s real-time strategy game Ashes of the Singularity includes full support for EMA, meaning that for the first time we can observe what performance boost (if any) we get by doing the previously unthinkable and sticking an AMD and Nvidia card into the same PC. That’s not to mention seeing how EMA stacks up again SLI or Crossfire—which have to be turned off in order to use DX12’s multi-GPU features—and whether AMD can repeat the ridiculous performance gains seen in the older Ashes benchmark.

Benchmarks conducted by a variety of sites, including Anandtech, Techspot, PC World, and Maximum PC all point to the same thing: EMA works, scaling can reach as high as 70 percent when adding a second GPU, and yes, AMD and Nvidia cards play nicely together.

That EMA works at all is something of an achievement for developer Stardock. Not only is it the first developer to implement the technology into an actual game, but doing so is hard going. Unlike older APIs like DX11 and OpenGL and multi-GPU support under the the proprietary systems developed by Nvidia (SLI) and AMD (Crossfire), you have to be a tenacious developer indeed to work with EMA and DX12. Under DX12, work that was previously handled by the driver has to be done manually. That’s a double-edged sword: if the developer knows what they’re doing, DX12 could provide a big performance uplift; but if they don’t, performance could actually decrease.

That said, developers do have a few options for implementing multiple GPUs under DX12. Implicit Multi Adapter (IMA) is the easiest, and is essentially like a DX12 version of Crossfire or SLI, with the driver doing most of the work to distribute tasks between GPUs (a feature not part of the Ashes benchmark). Then there’s EMA, which has two modes: linked or unlinked mode. Linked mode requires GPUs to be close to the same hardware, while unlinked—which is what Ashes uses—allows any mix of GPUs to be used. The whole point of this, and why this works at all under DX12, is to make use of Split Frame Rendering (SFR). This breaks down each frame of a game into several tiles, which are then rendered in parallel by the GPUs. This is different to the Alternate Frame Rendering (AFR) used in DX12, where each GPU renders an entire frame each, duplicating data across each GPU.

In theory, with EMA and SFR, performance should go way up. Plus, users should benefit from pooling graphics memory (i.e. using two 4GB GPUs would actually result in 8GB of usable graphics memory). The one bad thing about the Ashes benchmark? It currently only supports AFR.

Leave a Reply

Your email address will not be published. Required fields are marked *

 characters available

*



Popular Pages
  • CV Resume Ahmadrezar Razian-سید احمدرضا رضیان-رزومه Resume Full name Sayed Ahmadreza Razian Nationality Iran Age 36 (Sep 1982) Website ahmadrezarazian.ir  Email ...
  • CV Resume Ahmadrezar Razian-سید احمدرضا رضیان-رزومه معرفی نام و نام خانوادگی سید احمدرضا رضیان محل اقامت ایران - اصفهان سن 33 (متولد 1361) پست الکترونیکی ahmadrezarazian@gmail.com درجات علمی...
  • Nokte feature image Nokte – نکته نرم افزار کاربردی نکته نسخه 1.0.8 (رایگان) نرم افزار نکته جهت یادداشت برداری سریع در میزکار ویندوز با قابلیت ذخیره سازی خودکار با پنل ساده و کم ح...
  • Tianchi-The Purchase and Redemption Forecasts-Big Data-Featured Tianchi-The Purchase and Redemption Forecasts 2015 Special Prize – Tianchi Golden Competition (2015)  “The Purchase and Redemption Forecasts” in Big data (Alibaba Group) Among 4868 teams. Introd...
  • Brick and Mortar Store Recommendation with Budget Constraints-Featured Tianchi-Brick and Mortar Store Recommendation with Budget Constraints Ranked 5th – Tianchi Competition (2016) “Brick and Mortar Store Recommendation with Budget Constraints” (IJCAI Socinf 2016-New York,USA)(Alibaba Group...
  • Drowning Detection by Image Processing-Featured Drowning Detection by Image Processing In this research, I design an algorithm for image processing of a swimmer in pool. This algorithm diagnostics the swimmer status. Every time graph sho...
  • 1st National Conference on Computer Games-Challenges and Opportunities 2016-Featured 1st National Conference on Computer Games-Challenges and Opportunities 2016 According to the public relations and information center of the presidency vice presidency for science and technology affairs, the University of Isfah...
  • Shangul Mangul Habeangur,3d Game,AI,Ahmadreza razian,boz,boz boze ghandi,شنگول منگول حبه انگور,بازی آموزشی کودکان,آموزش شهروندی,آموزش ترافیک,آموزش بازیافت Shangul Mangul HabeAngur Shangul Mangul HabeAngur (City of Goats) is a game for child (4-8 years). they learn how be useful in the city and respect to people. Persian n...
  • Design an algorithm to improve edges and image enhancement for under-sea color images in Persian Gulf-Featured 3rd International Conference on The Persian Gulf Oceanography 2016 Persian Gulf and Hormuz strait is one of important world geographical areas because of large oil mines and oil transportation,so it has strategic and...
  • 2nd Symposium on psychological disorders in children and adolescents 2016 2nd Symposium on psychological disorders in children and adolescents 2016 2nd Symposium on psychological disorders in children and adolescents 2016 Faculty of Nursing and Midwifery – University of Isfahan – 2 Aug 2016 - Ass...
  • MyCity-Featured My City This game is a city simulation in 3d view. Gamer must progress the city and create building for people. This game is simular the Simcity.
  • GPU vs CPU Featured CUDA Optimizing raytracing algorithm using CUDA Abstract Now, there are many codes to generate images using raytracing algorithm, which can run on CPU or GPU in single or multi-thread methods. In t...
Popular posts
Interested
About me

My name is Sayed Ahmadreza Razian and I am a graduate of the master degree in Artificial intelligence .
Click here to CV Resume page

Related topics such as image processing, machine vision, virtual reality, machine learning, data mining, and monitoring systems are my research interests, and I intend to pursue a PhD in one of these fields.

جهت نمایش صفحه معرفی و رزومه کلیک کنید

My Scientific expertise
  • Image processing
  • Machine vision
  • Machine learning
  • Pattern recognition
  • Data mining - Big Data
  • CUDA Programming
  • Game and Virtual reality

Download Nokte as Free


Coming Soon....

Greatest hits

The fear of death is the most unjustified of all fears, for there’s no risk of accident for someone who’s dead.

Albert Einstein

Anyone who has never made a mistake has never tried anything new.

Albert Einstein

You are what you believe yourself to be.

Paulo Coelho

Imagination is more important than knowledge.

Albert Einstein

One day you will wake up and there won’t be any more time to do the things you’ve always wanted. Do it now.

Paulo Coelho

Gravitation is not responsible for people falling in love.

Albert Einstein

It’s the possibility of having a dream come true that makes life interesting.

Paulo Coelho

Waiting hurts. Forgetting hurts. But not knowing which decision to take can sometimes be the most painful.

Paulo Coelho


Site by images
Recent News Posts