AMD: RDNA 3 Speculation, Rumours and Discussion

[gamervivek]

Unlike 3090 being advertised for 8k, these cards will do 8k and 8k already has a couple of reasons in this video for back to the future.

 

[CarstenS]

Do they give any reason why they use vastly different scenes for 4k and 8k respectively? I didn't hear any commentary and while this might be ok-ish for 6900XT <-> RTX 3090 comparison [edit: strike that, different time of days in some games like AC:V or Hor0dawn and camera angles WDL], it certainly invalidates 4k -> 8k scaling.

 

[techuse]

8k has to be the most wasteful use of GPU cycles.

 

[trinibwoy]

8k has to be the most wasteful use of GPU cycles.

I used to think the same about 4K but the benefits become more apparent as the resolution of assets and effects increases in newer games. Native 4K is still a waste though given how good reconstruction techniques have become.

 

[DegustatoR]

Unlike 3090 being advertised for 8k, these cards will do 8k

These cards won't be anywhere closer to being capable of doing 8K than 3090 is right now.
8K is years off, in both GPU processing capabilities and display devices.

I also kinda doubt that 8K will even become that widespread considering that you'd need >80" display to be able to see it from a typical TV viewing distance.

 

[zed]

I used to think the same about 4K but the benefits become more apparent as the resolution of assets and effects increases in newer games. Native 4K is still a waste though given how good reconstruction techniques have become.

nah mate, notice how the matrix demo on series S at ~530p is visually far superior than eg halo infinite on series X @ 2140p, 16x the pixels yet it looks far worse. Quality > quantity

 

[no-X]

These cards won't be anywhere closer to being capable of doing 8K than 3090 is right now.

Well, Navi 31 is expected to be ~2.5× faster than RTX 3090 and AD102 should be about ~2.2 faster than RTX 3090. That's:

• 66-75 FPS in RDR2
• 68-78 FPS in Flight Simulator 2020
• 68-78 FPS in Assassin's Creed: Valhalla
• 79-90 FPS in Horizon Zero Dawn
• 128-145 FPS in Forza Horizon 4
• 110-125 FPS in Watch Dogs Legion
• 101-115 FPS in Fortnite

That's all solidly above 60 FPS i 8K, so not even FreeSync / G-Sync is needed to achieve good fluent result.

 

[trinibwoy]

nah mate, notice how the matrix demo on series S at ~530p is visually far superior than eg halo infinite on series X @ 2140p, 16x the pixels yet it looks far worse. Quality > quantity

Not sure how that’s inconsistent with what I said. What about matrix at 530p vs matrix at 4K?

 

[BRiT]

8k has to be the most wasteful use of GPU cycles.

No. Crypto-mining is.

 

[Pressure]

I feel singled out as I actually have an 8K monitor

 

[pjbliverpool]

Not sure how that’s inconsistent with what I said. What about matrix at 530p vs matrix at 4K?

This is exactly what I thought. The Matrix may look better overall but the image quality on XSS is horrendous and would absolutely benefit from a higher base resolution. In fact the more realistic the graphics, the more likely you are to be pulled out of the immersion by a noisy or aliased image so The Matrix would likely benefit more than most games from a higher resolution or higher quality reconstruction method with reasonable base res. That's notwithstanding my comments in the other thread on it benefiting from some kind of post processing filter to make the image look more TV like than CGI like.

 

[DegustatoR]

Well, Navi 31 is expected to be ~2.5× faster than RTX 3090 and AD102 should be about ~2.2 faster than RTX 3090. That's:

• 66-75 FPS in RDR2
• 68-78 FPS in Flight Simulator 2020
• 68-78 FPS in Assassin's Creed: Valhalla
• 79-90 FPS in Horizon Zero Dawn
• 128-145 FPS in Forza Horizon 4
• 110-125 FPS in Watch Dogs Legion
• 101-115 FPS in Fortnite

That's all solidly above 60 FPS i 8K, so not even FreeSync / G-Sync is needed to achieve good fluent result.

That's a nice list of previous generation games without ray tracing being active.
Not sure how it is relevant to what people will actually want to run on their future GPUs though.

 

[gamervivek]

These cards won't be anywhere closer to being capable of doing 8K than 3090 is right now.
8K is years off, in both GPU processing capabilities and display devices.

I also kinda doubt that 8K will even become that widespread considering that you'd need >80" display to be able to see it from a typical TV viewing distance.

Like 3090 they will be for enthusiasts who use the latest and the greatest. No widespread adoption necessary for years or even a decade. Linus already did a 3090 8k review at launch last year with nvidia's blessings.

Techpowerup's latest reviews show the high-end cards( 6800XT and above ) doing close to 100fps overall at 4k. Both AMD and nvidia will have to market 8k in order to show relevant differences at that point. nvidia have already done it with 3090, AMD can't do it with 16GB only.

https://www.techpowerup.com/review/gainward-geforce-rtx-3080-ti-phantom-gs/27.html

That's a nice list of previous generation games without ray tracing being active.
Not sure how it is relevant to what people will actually want to run on their future GPUs though.

That games list isn't going to change that significantly in a year.

HZD will get an update, GTAVI isn't certainly going to be out and FH5 already runs at 50fps on a 3090.

Recent games have also significantly upped the VRAM requirements, many having issues with 3080's 10GB at 4k and Far Cry 6 flat out requiring 16GB with HD textures at 4k. Improved textures for 8k would push it even further.

AMD will be shooting themselves in the foot if they put out a card with 2.5x the horsepower of 6900XT and hobble it with just 16GB of VRAM.

 

[trinibwoy]

There is nothing about Far Cry 6 that needs 16GB.

 

[Jawed]

Is this a new way to use Infinity Cache:

FINE GRAINED REPLAY CONTROL IN BINNING HARDWARE - Advanced Micro Devices, Inc. (freepatentsonline.com)

Some implementations provide systems, devices, and methods for rendering a plurality of primitives of a frame, the plurality of primitives being divided into a plurality of batches of primitives and the frame being divided into a plurality of bins. For at least one batch of the plurality of batches the rendering includes, for each of the plurality of bins, rendering primitives of a first sub-batch rasterizing to that bin, and for each of the plurality of bins, rendering primitives of a second sub-batch rasterizing to that bin.

Seems like it should be read in conjunction with:

DELTA TRIPLET INDEX COMPRESSION - Advanced Micro Devices, Inc. (freepatentsonline.com)

Methods, devices, and systems for compressing and decompressing a stream of indices associated with graphics primitives. A group of delta values is determined based on a group of indices of the stream of indices. The group of delta values is compared to delta values in a lookup table. The group of indices is compressed based on an entry in the lookup table if the group of delta values matches all delta values in the entry, otherwise, the group of indices is compressed based on variable-length encoding.

So is this for a binning rasteriser, similar to NVidia (presuming NVidia still does that)?

I'm struggling to see the novelty here. I'm just going to assume having Infinity Cache allows brute forcing...

EDIT: it's occurred to me that AMD can detect certain kinds of rendering passes by the state set up by the game. So a Z-prepass would go at lightspeed, since the data per vertex is tiny...

 

[eek2121]

These cards won't be anywhere closer to being capable of doing 8K than 3090 is right now.
8K is years off, in both GPU processing capabilities and display devices.

I also kinda doubt that 8K will even become that widespread considering that you'd need >80" display to be able to see it from a typical TV viewing distance.

At least some of LG’s new OLEDs shipping Q2 of next year are 8K.

While I do agree with the point that next gen likely won’t have enough juice for 8K, it is important to note that 8K displays do exist, and games will look better in 8K.

 

[pjbliverpool]

At least some of LG’s new OLEDs shipping Q2 of next year are 8K.

While I do agree with the point that next gen likely won’t have enough juice for 8K, it is important to note that 8K displays do exist, and games will look better in 8K.

With reconstruction techniques advancing as they are I doubt we will ever see a move to native 8k. I imagine today that an 8k output in DLSS performance mode (4k internal) would look pretty damn spectacular (wish someone would make this comparison). Probably very comparable and likely better in some aspects to native 8k. By the time native 8k screens are prolific, DLSS or potentially superior upscaling solutions will likely be able to beat out the native resolution in most regards.

 

[gamervivek]

6nm Navi24 to be released soon.

https://videocardz.com/newz/amd-6nm...oming-soon-to-radeon-rx-6500xt-graphics-cards

Looks like the 6nm Navi33 will be here miuch sooner than the high-end RDNA3 cards.

 

[Kaotik]

6nm Navi24 to be released soon.

https://videocardz.com/newz/amd-6nm...oming-soon-to-radeon-rx-6500xt-graphics-cards

Looks like the 6nm Navi33 will be here miuch sooner than the high-end RDNA3 cards.

How so?

 

[Jawed]

So this looks like the multi-bridge interconnect that has been rumoured for a while now:

consisting of 3 pieces in this picture, 130, 140 and 150.

Notice that 160 and 170 are unrelated dies that just happen to also be fixed to the upper surface of two chiplets, 110 and 120.

Clearly an arrangement like this means that the bridge chips cannot connect directly to GDDR.

See:

https://www.freepatentsonline.com/y2022/0051985.html

A semiconductor package includes a first die, a second die, and an interconnect die coupled to a first plurality of through-die vias in the first die and a second plurality of through-die vias in the second die. The interconnect die provides communications pathways the first die and the second die.