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chakkra on 14 May 2020
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JRPGfan said:
kirby007 said:

Yes, i believe it is generated on the PS5 without a doubt, but its not made by Sony

But Tim Sweeny did say that the same Tech demo wouldnt be possible on anything but the PS5 currently.
So its not made by Sony, but "for" the PS5.

Basically the load on the SSD to run this level of detail, with the 8k textures, ect would be too demanding for the XSX.
They would have to do work to get it running on XSX, and might have to lower quality of textures or amounts, because it couldnt load them as fast as the PS5 does.

Where do you guys get your information from?

Let me paste here the same answer I did in another thread:

"A number of different components are required to render at this level of detail," says Sweeney. "One is GPU performance and GPU architecture to draw an incredible amount of geometry. You're talking about a very large number of teraflops being required for this. The other is the ability to load and stream it efficiently."

Would this demo run on my PC with a RTX 2070 Super? Yes, according to Libreri, and I should get "pretty good" performance. For comparison, the PlayStation 5 GPU the demo video was captured on achieves 10.28 teraflops, while the RTX 2070 Super hits just over 9 teraflops. 

Regarding loading and streaming, though, Sweeney says that the PlayStation 5's SSD architecture is "god-tier" and "pretty far ahead of PCs," but that you should still get "awesome performance" with an NVMe SSD, which I'm using."

https://www.pcgamer.com/unreal-engine-5-tech-demo/

This is a piece of the PCGamer interview with Epic Games.