Friday, March 6th 2020

AMD RDNA2 Graphics Architecture Detailed, Offers +50% Perf-per-Watt over RDNA

With its 7 nm RDNA architecture that debuted in July 2019, AMD achieved a nearly 50% gain in performance/Watt over the previous "Vega" architecture. At its 2020 Financial Analyst Day event, AMD made a big disclosure: that its upcoming RDNA2 architecture will offer a similar 50% performance/Watt jump over RDNA. The new RDNA2 graphics architecture is expected to leverage 7 nm+ (7 nm EUV), which offers up to 18% transistor-density increase over 7 nm DUV, among other process-level improvements. AMD could tap into this to increase price-performance by serving up more compute units at existing price-points, running at higher clock speeds.

AMD has two key design goals with RDNA2 that helps it close the feature-set gap with NVIDIA: real-time ray-tracing, and variable-rate shading, both of which have been standardized by Microsoft under DirectX 12 DXR and VRS APIs. AMD announced that RDNA2 will feature dedicated ray-tracing hardware on die. On the software side, the hardware will leverage industry-standard DXR 1.1 API. The company is supplying RDNA2 to next-generation game console manufacturers such as Sony and Microsoft, so it's highly likely that AMD's approach to standardized ray-tracing will have more takers than NVIDIA's RTX ecosystem that tops up DXR feature-sets with its own RTX feature-set.
AMD GPU Architecture Roadmap RDNA2 RDNA3 AMD RDNA2 Efficiency Roadmap AMD RDNA2 Performance per Watt AMD RDNA2 Raytracing
Variable-rate shading is another key feature that has been missing on AMD GPUs. The feature allows a graphics application to apply different rates of shading detail to different areas of the 3D scene being rendered, to conserve system resources. NVIDIA and Intel already implement VRS tier-1 standardized by Microsoft, and NVIDIA "Turing" goes a step further in supporting even VRS tier-2. AMD didn't detail its VRS tier support.

AMD hopes to deploy RDNA2 on everything from desktop discrete client graphics, to professional graphics for creators, to mobile (notebook/tablet) graphics, and lastly cloud graphics (for cloud-based gaming platforms such as Stadia). Its biggest takers, however, will be the next-generation Xbox and PlayStation game consoles, who will also shepherd game developers toward standardized ray-tracing and VRS implementations.

AMD also briefly touched upon the next-generation RDNA3 graphics architecture without revealing any features. All we know about RDNA3 for now, is that it will leverage a process node more advanced than 7 nm (likely 6 nm or 5 nm, AMD won't say); and that it will come out some time between 2021 and 2022. RDNA2 will extensively power AMD client graphics products over the next 5-6 calendar quarters, at least.
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306 Comments on AMD RDNA2 Graphics Architecture Detailed, Offers +50% Perf-per-Watt over RDNA

#301
oxrufiioxo
R0H1TAnd that's exactly why AMD hasn't bothered competing at the top end for the last few years. A lot of people tend to expect AMD to always be the cheaper brand, even if they tend to lead in performance, efficiency or really just about anything else. Nvidia can still command a premium by selling equivalent performing cards just because they're Nvidia, this is the same even for Intel though with locked chips they tend to segment the hell out of that market covering pretty much every price point imaginable.

The point being buyers tend to expect more, a lot more for a lot less ($) from AMD than their bigger brand counterparts. This is why selling a near 3080 performant chip, at similar prices is gonna be hard for them.
I definitely agree even if they have 3080+/-10% performance at $649 Nvidia will outsell them by at least 2-1. I ran into this issue a lot doing systems for people no matter how much I showed them the RX 570/580 was better than the 1050/Ti they wouldn't touch AMD even at a similar price with much better performance. To a lesser degree I ran into the same issue with 5700XT vs the 2060s/2070s
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#302
Super XP
Though I agree with the last 2 posts...
AMD competing in the high end and ultra high end is the only way they can convince the gaming community they have what it takes and some. The majority of the money is made in the mainstream, but i ln order for there brand to overcome this comparison hump AMDs been having issues with is competition in the high end.
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#303
Valantar
Super XPThough I agree with the last 2 posts...
AMD competing in the high end and ultra high end is the only way they can convince the gaming community they have what it takes and some. The majority of the money is made in the mainstream, but i ln order for there brand to overcome this comparison hump AMDs been having issues with is competition in the high end.
That is partially true, but it also takes more than that - there have been periods when AMD has had the best performance available in both the CPU and GPU spaces, yet in all instances they've been outsold by the incumbents in each market. Mindshare gains take a lot of time - but as you say, halo products are also necessary to gain it to any significant degree. Some people take a lot of time to move from "there are Nvidia GPUs, and then there's also another option if those don't rock your boat" to "there are GPUs from both Nvidia and AMD" when they are considering a GPU. Moving that needle is going to take significant time and effort, so I'm truly hoping they have a compelling halo product to start doing that work. Without it there's a significant risk that AMD and Intel will be competing over the same 20% of the GPU market with Nvidia sitting pretty on the rest, and that isn't good for anyone.
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#304
Super XP
ValantarThat is partially true, but it also takes more than that - there have been periods when AMD has had the best performance available in both the CPU and GPU spaces, yet in all instances they've been outsold by the incumbents in each market. Mindshare gains take a lot of time - but as you say, halo products are also necessary to gain it to any significant degree. Some people take a lot of time to move from "there are Nvidia GPUs, and then there's also another option if those don't rock your boat" to "there are GPUs from both Nvidia and AMD" when they are considering a GPU. Moving that needle is going to take significant time and effort, so I'm truly hoping they have a compelling halo product to start doing that work. Without it there's a significant risk that AMD and Intel will be competing over the same 20% of the GPU market with Nvidia sitting pretty on the rest, and that isn't good for anyone.
Couldn't have said it better myself :D
Let's hope RDNA2 has what it takes. :)
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#305
Master Tom
O.K. let's say hopefully it can compete with the RTX 3080.
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#306
BoboOOZ
oxrufiioxoI definitely agree even if they have 3080+/-10% performance at $649 Nvidia will outsell them by at least 2-1. I ran into this issue a lot doing systems for people no matter how much I showed them the RX 570/580 was better than the 1050/Ti they wouldn't touch AMD even at a similar price with much better performance. To a lesser degree I ran into the same issue with 5700XT vs the 2060s/2070s
Quite true, the only thing which is different now is that 3080 availability seems appalling.
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