AMD Radeon RDNA2 Navi (RX 6500, 6600, 6700, 6800, 6900 XT)

Are you talking about DXR support without hw acceleration ? It will be slow as hell... Even witj all the optimisations in the world...

 

Probably this comparison is not too usefull because mesh shaders were made to get rid of slow HW serialization points like primitives redistribution for workload balanching, IA, culling hardware, etc, etc.
Geometry processing can be mapped to compute shaders execution model and can be scaled efficiently with number of SIMD units, likely better then with traditional graphics pipeline (once we move to wider hardware).
On the other hand, divergent nature of tree traversal doesn't sound like a good candidate for SIMD processing.

 

It’s like with any new feature the experts and uber developers will always demand more control. However for the average developer the off the shelf implementations are likely very useful and better than anything they would come up with on their own. It’s better to start with something approachable and functional that actually makes it into games.

 

It will be slow, but it will still work.

RTXGI supports any DXR capable card, even a 1060 and according to some tests, it runs pretty well.

 

RX 6800 Custom Reviews

ComputerBase POWERCOLOR RX 6800 XT Red Devil SAPPHIRE RX 6800 XT NITRO+
Der8auer POWERCOLOR RX 6800 XT Red Devil [German]
Eteknix ASUS RX 6800 XT ROG STRIX LC [Video]
Expreview XFX RX 6800 XT Speedster Merc 319
GamerMeld POWERCOLOR RX 6800 XT Red Devil
Guru3D XFX RX 6800 XT Speedster Merc 319 SAPPHIRE RX 6800 XT NITRO+
HardwareLuxx ASUS RX 6800 XT ROG STRIX LC
HardwareUnboxed SAPPHIRE RX 6800 XT NITRO+
Hexus POWERCOLOR RX 6800 XT Red Devil
KitGuru POWERCOLOR RX 6800 XT Red Devil [Video]
Overclock3D XFX RX 6800 XT Speedster Merc 319 [Video]
OverclockersClub XFX RX 6800 XT Speedster Merc 319
Overclocking ASUS RX 6800 XT ROG STRIX LC
PCWorld XFX RX 6800 XT Speedster Merc 319
TechPowerUP SAPPHIRE RX 6800 XT NITRO+ POWERCOLOR RX 6800 XT RED DEVIL

Thanks to VideoCardz!

 

so has anyone been able to get one ?

 

We did re-test the 1080Ti as a reference point for the fastest non-RT card. In most current raytracing titles, it is very slow with DXR on. For this very reason I guess AMD sees no merit enabling software-RT for it's RDNA or Vega cards.

 

I'm saying he has been caught in the past misquoting or outright lying about his "sources."
He is a glorified custom PC builder with a youtube channel that has enough of a following he has managed to wrangled into becoming a "benchmarking/review" channel with little to no actual technical knowledge on the industry other than being an "enthusiast" for a long time.
I have voiced the same criticism about Kyle, aka Bitwit, as well.

What I will say, is that most people criticizing AMD about the custom AIB cards are looking at this, seemingly, with blinders on comparing it to Nvidia's launch.
The situation, globally, is literally changing week by week. Could AMD have said, "We will be trying to launch at XX date but due to constantly shifting logistical challenges across multiple regions and markets, AMD and our Partners cannot guarantee anything."
Sure, but that would have gone over even worse with most people, especially shareholders/investors.

Remember, covid is over now. Countries aren't shutting down. The markets are only going up.

Edit- And I will point out that the reference card situation is going exactly as I had said. There are constant shipments every couple of days, at least from what I have seen in NA.

 

That's because most RT settings in current titles are overkill, as demonstrated by Watch Dogs Legion. Even PCs medium setting is beyond what the consoles do, now imagine a PC low setting. I bet even a 1080Ti would have acceptable performance. I mean yeah the FPS drops would still be big, but you'd still have a playable experience.

 

Would it be possible to train an AI to do the optimizations? that would really change the game. no pun intended lol.

 

From what I see in europe, no.

 

I though you were talking about more's law . There are a lot of YT channel like this.

 

https://www.proshop.de/AMD-Radeon-RX-6000-Series-overview

 

I think the issue is AMD coming out and stating they had more stock than nvidia did and they put guide lines for stores to follow in how to sell them. We also had that AMD guy bet money that it would be better than nvidia's launch.

AMD might have given 3 or 4 times the amount of cards as nvidia to stores but they still sold out in seconds and amd has gone radio silent. since then. Now the stores control the conversation. If you notice they are all saying we got 0 aib stock or very little.

It was a badly handled launch with bad expectations. If they came out and said hey we are launching all the stock we have but its going to be very hard to get I think things would have gone better for them.


I also don't care for Jay's persona online (don't know him personally)

 

Anyone, yes, but not too many. Numbers are if possible even worse than 3080 launch.

 

Sapphire Radeon RX 6800 XT Nitro+ Review | TechPowerUp

 

Wouldn’t be surprised if that’s true given relative market share and Nvidia’s likely larger global distribution channel. Whatever numbers Nvidia prepared for launch were likely much higher than AMD’s.

Nothing surprising here except that Azor guy on twitter giving people false hope that Radeon would succeed where GeForce, Zen, PlayStation and Xbox didn’t. I was able to snag a 5950x though and there are some good sales on b550 boards for Black Friday so all isn’t lost.

 

I found this to be extremely funny

The zortac 3080 amp is supposed to drop at 9:30 est on their site again. I'm going to try and grab that

edit - never went up still unable to get any card

 

It's at least in part trying to assimilate a fair number of other specialized software methods as well in the form of vertex, geometry, and tessellation shaders. Getting around the serialization of reading from the index buffer would be one fixed-function path replaced, although I'm not sure that on its own would be considered inherent to the hardware concept rather than a result of history. If Turing is used as an example, there were specific cases where the traditional pipeline could still win, like some tessellation scenarios. The continued evolution of the fixed-function pipeline also meant that the mesh shaders could frequently neglect certain things like the full suite of per-primitive culling options if the hardware could cull them easily. Part of the challenge would be weighing a fully-featured replacement shader versus the additional cost each programmable option incurs on the generic execution loop.

The BVH structure would likely be a black box until there's more standardization. There's not a firm consensus on what the BVH should look like at a lower level, and it's often tuned to the packing and access requirements of specific architectures. I wouldn't relish the prospect of having to write a new BVH node format or heuristic for every cache subsystem that exists or could exist.
Part of winnowing down the possibilities would come from the hard data from deployed RT hardware, but without the acceleration that we have the data would not be forthcoming.

However, is it certain that the most serious bottleneck for ray tracing is the acceleration hardware for the BVH? The most performant solution so far is the one with more dedicated hardware.
Is it a clear win to have a generic software solution running on shader hardware. The AMD execution loop is partially programmable, and as such has a round-trip between the texturing domain, 32-wide granularity, LDS capacity and bandwidth contention, LDS latency, and a pointer-chasing workload on a long-latency memory critical path.
Making more of the process programmable means adding more dependence on things like the SIMD hardware, LDS contention, and more trips through the memory pipeline.
It may not be guaranteed that a more clever solution can get out from under greater fixed costs.

 

How does the AMD Radeon 6800 handle Strife RTX / UE4 NvRTX_Caustics ?