FSR4 working on RDNA2/3 (unofficially)
- Thread starter Zathalus
- Start date
Zathalus
Member
RDNA3 does have matrix multiplication for INT8. So while the overhead is larger vs FSR3, it is faster vs RDNA2.
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kevboard
Member
yeah, but having those Ryzen AI chips and not using the NPU for anything useful would be a shame.
we know Microsoft plans to release a new version of Auto SR for the Xbox Ally X down the line, running on the NPU, but high performance FSR4 would be a much better feature to have.
Loomy
Thinks Microaggressions are Real
For what it's worth, Sony felt the need to contact wccftech to clarify what's coming to PS5 Pro next year. Looks like they make a distinction between FSR4 and whatever they're doing with the algorithm.
Article: [Update 09/10 - 5:33 PM] Following the article publication, Sony reached out to us to clarify that it's a new version of the PSSR upscaler powered by the same algorithm powering AMD FSR 4, co-developed as part of the Amethyst joint project by AMD and Sony that will hit PlayStation 5 Pro next year, and not AMD FSR 4. The original story follows with the appropriate corrections.
This is indeed cool though. Not sure why AMD were dragging their feet on this, but the last little bit of rumours we got was official support in Q4 of this year or Q1 of next year, so this tracks.
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We already knew playstation will always use PSSR with the only difference that in the future will share also the algorithm of FSR4 keeping the PSSR algorithm in the same time.
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Physiognomonics
Member
that's not what is written. You can have only one algorithm. This is the implementation on PS5 Pro that is completely different. I think this will be less confusing for customers, keeping the same name.
Loomy
Thinks Microaggressions are Real
In this case, he said in the video that one of the reasons AMD wants FSR4 on RDNA3 is for PS5 Pro. So Outlets ran with "FSR4 coming for PS5 Pro".
Sony then clarifies that no, it's not FSR4.
In the video he also says PS5 Pro is "basically RNDA '3.75' if you will". In the "Technical breakdown" video Mark Cerny did last year he clearly said PS5 Pro is somewhere between RDNA2 and RDNA3.
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dgrdsv
Member
It's highly likely that NPUs aren't integrated with GPU pipelines tightly enough to be used for upscaling in the way FSR/DLSS/XeSS do it.
Which is why AutoSR which is Qcom's NPU based upscaling runs with at least +1 frame latency and only does full frame upscaling.
demigod
Member
Losing fps on already low fps devices are not a good trade-off.
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jm89
Member
There's a part of me that feels like wccftech are making up sony reaching out to them. It just feels very unsony like, unless it's someone like digital foundry who cerny seems to have a fondness for.
Zathalus
Member
It is if you can drop a tier. FSR4 performance looks better vs FSR3 balanced and performs about the same. The increase in ms rendering time is less impactful at 30fps as well.
roosnam1980
Member
so ps5 wont get it cuz its rdna1.5 ? what about xsx
I mean if it's the same algorithm just ported to the Pro, then it pretty much is FSR 4.
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Zathalus
Member
It should work on XSX if AMD gives full RDNA2 support. Cost might be a bit high, especially for targeting 60fps.
roosnam1980
Member
would be miles better than fsr 2 and 3 , worth it imo.
Loomy
Thinks Microaggressions are Real
That would be a special kind of sad lol
kazuyamishima
Member
Exciting news for the PS5 Pro, PS6 portable and PS6, they'll all have a decent upscaler.
Duchess
Member
I pointed out that PS5 Pro wouldn't be getting "actual" FSR4 in another thread, but was savaged for the comment, even though I literally quoted Mark Cerny:
www.eurogamer.net
Mark Cerny: FSR 4 for PS5 Pro is the "next evolution of PSSR"
Last week, AMD released its new wave of graphics hardware, developed around the new RDNA 4 architecture. Machine learni…
www.eurogamer.net
If it takes the same inputs and produces the same outputs, then the difference is essentially moot, unless there is a notable performance divergence.I pointed out that PS5 Pro wouldn't be getting "actual" FSR4 in another thread, but was savaged for the comment, even though I literally quoted Mark Cerny:
Mark Cerny: FSR 4 for PS5 Pro is the "next evolution of PSSR"
Last week, AMD released its new wave of graphics hardware, developed around the new RDNA 4 architecture. Machine learni…
Salty Pickle
Member
The raster part is somewhere between RDNA 2 and 3, but ray tracing is RDNA 4 and ML also probably.
ML on cards is only inference, you don't have an algorithm in your GPU or PS5 Pro. When they talk about the algorithm they are referencing to the training part, the recipe to make a model. Sony will use the same algorithm and parameters to train their own model adapted to their hardware (int8 model)
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Bojji
Gold Member
ML on Pro is custom, it uses INT8 like RDNA3 but it's more capable.
Sept Terrion Of Nothing
Gold Member
Avatar, comment harmony. Sorry, couldn't help it 
Good choice by the way. No need to feel down
Good choice by the way. No need to feel down
They said to add/update the algorithm logic of PSSR with the FSR4. What means you can have only one algorithm? There are many algorithms logics in a program not just one.
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MisterXDTV
Member
They can call it "Pluto" for all I care. If the algorythm is the same DEVS will easily implement it on both platforms, that's the whole point of the firmware upgrade
Regarding FSR 4 on RDNA 3, seems pointless to me
You are not getting a performance upgrade at all, without the required hardware that RDNA 3 doesn't have
Regarding FSR 4 on RDNA 3, seems pointless to me
You are not getting a performance upgrade at all, without the required hardware that RDNA 3 doesn't have
Bojji
Gold Member
This works like XeSS, it can provide better image quality than Xess even. It even works on nvidia GPUs, should work on XSX but won't work on PS5 because RDNA1 lol.
Interesting concept, you still get better performance with it vs. native.
Bojji
Gold Member
It should.
Kurotri
Member
Damn. I gotta try this when I get home.
Zathalus
Member
You are. Although the boost isn't nearly as much as RDNA4, you still get a jump in performance.
It has INT8 acceleration. It can do INT8 4x faster vs FP32. So does the PS5 Pro (although much faster), hence this source code leak that allowed FSR4 to use INT8 and not FP8 allows it to work on RDNA3 and the PS5 Pro.
DirtInUrEye
Member
Wrong. On RDNA 3 FSR 4 balanced looks better and runs comparable or better than FSR 3 Quality. This outcome is in fact the opposite of pointless.
Good look with such low counts of TOPs and the extremely higher costs in the GPU.
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Bojji
Gold Member
Just like with Xess, resolutions are too low and performance impact too high to actually use it on 2020 consoles. But in theory...
ValiantInstance
Member
Fear not, the 9070XT has ai accelerators that previous generations do not have at all. So you can never get 'full fat' FSR4 on older cards. A lot of people seem not to grasp this.Good news. I upgraded from a 7800xt to a 9070xt just to use FSR4 more.
Im thinking i shouldve waited
DirtInUrEye
Member
Actually, people not on RDNA 4 typically do understand this and they aren't really bothered. The lesser iteration that is now available on older cards is still a significantly worthwhile fidelity upgrade over FSR 3, and users will take the freebie and enjoy it. 'Full fat' FSR 4 is currently just more performant, that's all.