Support NeoGAF

[Moses85]

It's real, and here he is after Cerny finished giving him that PSSR (you will see why these are spoliered):

Spoiler

 

[sachos]

7700XT doesn't have PSSR.

I know but if the RT performance of the Pro gpu is similar to the 7700XT and it already cant do 60fps at native 1080p it wont be able to do at 4K Performance either since upscaling has a cost. All of this assuming the RT performance is similar, we dont know how big the jump from RDNA3 to 4 in RT will be.

 

[DeepEnigma]

I know but if the RT performance of the Pro gpu is similar to the 7700XT and it already cant do 60fps at native 1080p it wont be able to do at 4K Performance either since upscaling has a cost. All of this assuming the RT performance is similar, we dont know how big the jump from RDNA3 to 4 in RT will be.

I am willing to bet the RT performance will surpass it, especially due to PSSR.

 

[64gigabyteram]

I just want to see what devs can do at 4K30 on the PS5 PRO.

Not much I'd imagine if diminishing returns are in play

 

[sachos]

I am willing to bet the RT performance will surpass it, especially due to PSSR.

In this case it could be another Alan Wake 2 situation were you have to render sub 900p and upscale to 1440p with PSSR and then do basic upscaling to 4K. This is all using the Ultra settings though, consoles rarely use those so you can get performance there too.

 

[DonkeyPunchJr]

Some of the pre-launch leaks said it'd support Dolby Vision for video streaming apps + UHD Blu Ray, has there been any info about this?

 

[Evil Calvin]

Why do they keep pushing 'ray tracing'? Most don't give a shit.

 

[Lysandros]

I know but if the RT performance of the Pro gpu is similar to the 7700XT and it already cant do 60fps at native 1080p it wont be able to do at 4K Performance either since upscaling has a cost. All of this assuming the RT performance is similar, we dont know how big the jump from RDNA3 to 4 in RT will be.

Based on what we know like twice the intersection throughput per CU and additional features designed to accelerate some other parts of the pipeline, RDNA 4 can only be more performent in RT compared to RDNA 3 which makes total sense. My only worry is the additional bandwidth pressure that those would potentially bring in case of PS5 PRO especially, since the machine's increase in this area is very 'modest' to say the least.

 

[MisterXDTV]

I know but if the RT performance of the Pro gpu is similar to the 7700XT

Except it's not...

RDNA 3 RT sucks compared to RDNA 4 RT, we already know that

 

[yogaflame]

Why do they keep pushing 'ray tracing'? Most don't give a shit.

A decent frame rate will be enough for me, but still, for me, it still looks cool to see RT with realistic lights and shadow especially in action games where there are times you can stop and enjoy the view. Stellar blade, FF7 Rebirth, Rise of Ronin, GOT, Elden Ring, Wukong, Resident Evil, etc. any game were you can stop and enjoy the view will truly benefit with RT. Hopefully PSSR will truly be revolutionary and game changer.

 

[Gaiff]

Why do they keep pushing 'ray tracing'? Most don't give a shit.

Do you want graphics to move to the next stage or stay stuck at the PS4 era? Because we need ray tracing to get to the next level.

 

[sachos]

Based on what we know like twice the intersection throughput per CU and additional features designed to accelerate some other parts of the pipeline, RDNA 4 can only be more performent in RT compared to RDNA 3 which makes total sense. My only worry is the additional bandwidth pressure that those would potentially bring in case of PS5 PRO especially, since the machine's increase in this area is very 'modest' to say the least.

Thats awesome. The thing is Cerny said its 2 to 3 times the RT performance but thats relative to the PS5 gpu and thats RDNA2. What is the equivalent RT of the PS5, something like a 6600 XT?
If you take the performance of that and multiply x2.5 you get around 7700XT performance at 4K (although this graph may be VRAM limited in this case, i dont know if its better to compare at 1440p or 1080p).

Galax GeForce RTX 4070 Super EX Review

The Galax GeForce RTX 4070 Super EX comes with a small price increase over the NVIDIA MSRP, yet gives you a premium cooler that's much stronger than what's offered on the baseline models. Both temperatures and noise levels are improved over the Founders Edition.

www.techpowerup.com

 

[Lysandros]

Thats awesome. The thing is Cerny said its 2 to 3 times the RT performance but thats relative to the PS5 gpu and thats RDNA2. What is the equivalent RT of the PS5, something like a 6600 XT?
If you take the performance of that and multiply x2.5 you get around 7700XT performance at 4K (although this graph may be VRAM limited in this case, i dont know if its better to compare at 1440p or 1080p).

Galax GeForce RTX 4070 Super EX Review

The Galax GeForce RTX 4070 Super EX comes with a small price increase over the NVIDIA MSRP, yet gives you a premium cooler that's much stronger than what's offered on the baseline models. Both temperatures and noise levels are improved over the Founders Edition.

www.techpowerup.com

Make it RX 6700 and add some due to lower level API/offline BVH. I was responding to the core question of RDNA 3 vs RDNA 4 RT hardware in the context of throughput per hardware component/IE/CU. I far as I know RX 7700 XT has only half the L0/L1 cache amount per DCU/SA compared to PS5 PRO, this is a factor. Altogether with mentioned RDNA 4 RT IPC/feature improvements and lower level API logic dictates that PS5 RT performance should exceed 7700 XT at least somewhat with enough developer care. But again that modest shared APU bandwidth is a big question.

 

[sachos]

Make it RX 6700 and add some due to lower level API/offline BVH. I was responding to the core question of RDNA 3 vs RDNA 4 RT hardware in the context of throughput per hardware component/IE/CU. I far as I know RX 7700 XT has only half the L0/L1 cache amount per DCU/SA compared to PS5 PRO, this is a factor. Altogether with mentioned RDNA 4 RT IPC/feature improvements and lower level API logic dictates that PS5 RT performance should exceed 7700 XT at least somewhat with enough developer care. But again that modest shared APU bandwidth is a big question.

Thanks for the awesome input. Really fun trying to predict performance for new hardware.
About the low level API boost, the biggest difference i remember is the one in CP2077 PS5 Rt mode vs 6700

In this video they also test Avatar that also has RT but there the 6700 is 10% faster than PS5.

 

[//DEVIL//]

PCMR in shambles.

I can't sleep anymore ..

 

[Lysandros]

Thanks for the awesome input. Really fun trying to predict performance for new hardware.
About the low level API boost, the biggest i remember is the one in CP2077 PS5 Rt mode vs 6700

In this video they also test in Avatar that also has RT but there the 6700 is 10% faster than PS5.

Yes, it depends on the game but generally in the ballpark. PS5 is also ~5-10% ahead in Black Myth Wukong compared to a PC with a RX6700 and equivalent (XSX') CPU.



Theoretically you could extract up to twice the performance from a fixed platform using a lower level API compared to an equivalent PC hardware like John Carmack once stated. But it isn't practical nowadays due to resource and time constraints of the industry and higher game complexity. Only some first party efforts can have the luxury to advance further to be closer to this goal.

 

[Calverz]

And this is surprising why? I'd have thought that would be the minimum for the games that are essentially last gen or 4 years old? The less demanding titles.