TheRetroArcade
Veteran
Posts: 1,965
Joined: Feb 2026
Joined: Feb 2026
All these GPUs share very similar parts and features, so if one can do AI upscaling, why can't they all?
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You might not be fully aware of this, but PC gamers with RDNA-based GPUs in their graphics cards share quite a lot in common with anyone who has a PlayStation 5 or PS5 Pro. That's because there are quite a few architectural features common to both. However, while only RDNA 4 users officially get FSR 4, PS5 Pro gamers will soon be getting an updated version of Sony's PSSR upscaler, with Resident Evil Requiem being the first game to use it.
If your reaction to this is 'so what?', it's worth bearing in mind that FSR 4 and PSSR (PlayStation Spectral Super Resolution) stem from Project Amethyst, a joint venture between AMD and Sony for bringing AI-powered upscaling to consoles and PCs alike.
Now, it is important to note that FSR 4 and PSSR aren't the same thing. I'm sure there are some similarities between the fundamental algorithms in both, but AMD's upscaler is designed to be used on GPUs that sport a huge L3 cache, along with a copious amount of VRAM and bandwidth. PSSR, on the other hand, has to run on what's essentially an integrated GPU, albeit a very beefy one, that doesn't have any L3 cache and a shared memory pool.
More importantly, RDNA 4 GPUs have dedicated units for processing the matrix instructions used in the AI parts of FSR 4, whereas the PS5 Pro doesn't. It runs all the calculations via the 'normal' compute units.
Update Feb 28: The powers of the internet and social media have reliably informed me that I'm talking gibberish above: the GPU in the PS5 Pro does have units for processing matrix instructions, enough for the chip to hit 300 TOPS in INT8 data format. They're all correct, I am indeed very wrong. Many apologies for this mistake. However, the rest of my argument remains valid, because despite RDNA 3 chips have significantly less INT8 performance, we know FSR 4 can be modded to work on them. And more importantly, if this metric was the sole deciding factor behind whether or not a GPU can handle a convolutional neural network for AI upscaling, an RTX 2060 with less than 100 TOPS wouldn't be able to handle DLSS 4. Which it does.
Anyway, the point I've wandered away from here is that despite modders getting FSR 4 to run on RDNA 2 GPUs, AMD still hasn't offered any official support for older architectures. Even though it cle...Read more: Full article on www.pcgamer.com
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You might not be fully aware of this, but PC gamers with RDNA-based GPUs in their graphics cards share quite a lot in common with anyone who has a PlayStation 5 or PS5 Pro. That's because there are quite a few architectural features common to both. However, while only RDNA 4 users officially get FSR 4, PS5 Pro gamers will soon be getting an updated version of Sony's PSSR upscaler, with Resident Evil Requiem being the first game to use it.
If your reaction to this is 'so what?', it's worth bearing in mind that FSR 4 and PSSR (PlayStation Spectral Super Resolution) stem from Project Amethyst, a joint venture between AMD and Sony for bringing AI-powered upscaling to consoles and PCs alike.
Now, it is important to note that FSR 4 and PSSR aren't the same thing. I'm sure there are some similarities between the fundamental algorithms in both, but AMD's upscaler is designed to be used on GPUs that sport a huge L3 cache, along with a copious amount of VRAM and bandwidth. PSSR, on the other hand, has to run on what's essentially an integrated GPU, albeit a very beefy one, that doesn't have any L3 cache and a shared memory pool.
More importantly, RDNA 4 GPUs have dedicated units for processing the matrix instructions used in the AI parts of FSR 4, whereas the PS5 Pro doesn't. It runs all the calculations via the 'normal' compute units.
Update Feb 28: The powers of the internet and social media have reliably informed me that I'm talking gibberish above: the GPU in the PS5 Pro does have units for processing matrix instructions, enough for the chip to hit 300 TOPS in INT8 data format. They're all correct, I am indeed very wrong. Many apologies for this mistake. However, the rest of my argument remains valid, because despite RDNA 3 chips have significantly less INT8 performance, we know FSR 4 can be modded to work on them. And more importantly, if this metric was the sole deciding factor behind whether or not a GPU can handle a convolutional neural network for AI upscaling, an RTX 2060 with less than 100 TOPS wouldn't be able to handle DLSS 4. Which it does.
Anyway, the point I've wandered away from here is that despite modders getting FSR 4 to run on RDNA 2 GPUs, AMD still hasn't offered any official support for older architectures. Even though it cle...Read more: Full article on www.pcgamer.com
What do you think about this?