bonzobanana said:
I've already pasted relevant info and seen benchmarks and information from impartial sources based on real world configurations. Nvidia would probably not be a good source of such info. There is a 10% increase in CPU speed I believe for portable mode on Switch 2 over docked mode and portable mode seems to make heavier use of DLSS to upscale from a much lower resolution. Portable mode also has much lower memory bandwidth. It paints a picture of the GPU doing less and the CPU of doing more which is exactly what you would expect for DLSS in that situation. This idea that AI upscaling is not linked to CPU performance is very strange to say the least. CPU's will always be optimal for some code. AMD's FSR 3 and earlier is upscaling with much lower CPU overheads and its basically a bit pants. XeSS is much heavier on the CPU and works far better. Logic would dictate more CPU performance equals higher quality upscaling? It just seems so obvious with every source of info backing me up as far as I can tell that we will just have to agree to disagree. I'm basically saying that there is an extra burden on the CPU to upscale from 360p to 1080p lets say even though it takes a huge amount of work off the GPU compared to natively rendering at that higher resolution. I'm also saying there is extra CPU burden beyond that for additional frame generation which again makes it easier for the GPU to have a higher frame count. Obviously on a PC this CPU burden is far less significant than it is on the Switch 2 which has far lower CPU resources. I'm stating the Switch 2 will likely have to choose DLSS modes on occasion that are less demanding on CPU resources when it needs those CPU resources elsewhere so we may see Switch 2 games where the DLSS is more rough around the edges and has issues more like FSR on occasion as it is paired back to become more manageable for the system. I don't think I'm saying anything controversial in anyway. However on the positive side the Switch 2 is a fixed platform so textures and other assets can be optimised to upscale well and graphic problems with upscaling can be seen and removed on a fixed platform that is much more difficult on PC with all its variables so I'm expecting overall the Switch 2 to punch above its weight in upscaling overall because it is a fixed platform but obviously it will be limited by being such a low performance platform overall. |
Yes, nVidia would be only relevant source for such info, since it's their official document for actual implementation.
You don't seem to understand how DLSS works - it's GPU dependent (though execution time can vary from engine to engine)
What produces higher CPU usage is not DLSS, but game rendering at lower resolution when DLSS is turned on, pushing more frames for GPU to render. But that is only if you're not frame capped.
Let's say you're running @ native 4K, capped at 60 frames, your GPU usage is at 99%, CPU usage is at some XX amount. Now you turn on DLSS Quality, which will render at 1440p and upscale to 4K. Your GPU usage will drop significantly, your CPU usage will stay the same. Why? Because it still renders 60 frames. Now turn that frame cap off and you will see your GPU again at 99%, resulting in higher than 60fps, with CPU usage increased since it needs to send more frames to GPU. Try this at home, if you have nVidia GPU.
DLSS is GPU dependent (as I said several times over, and as nVidia official documents state), whole rendering pipeline is CPU and GPU dependent. Hope this make it more clear for you.
