If above chart is correct.
In a nut shell.When a scene calls for G Box.Navi 21 will blaze thru it.Nvidia card will slow down.Nvidia appears to have upper hand in RT.
Reading AMD patents on this topic.Appears Big Navi or future AMD gpu will have a ability to redirect prioritys.
Let’s say Ampre has 20% of its hardware dedicated to RT. When RT is not needed it’s a waste of 20% rendering power.
Interesting read https://www.hardwaretimes.com/amd-big-navi-to-pack-80cus-5120-cores-20-cus-to-be-used-for-ray-tracing-20-tflops-of-fp32/amp/#referrer=https://www.google.com&_tf=From %1$s
I think a lot of people are only waiting for Big Navi because Nvidia failed us so hard.
There's a possibility that the Infinity Cache may be related to a patent that AMD filed last year on Adaptive Cache Reconfiguration Via Clustering. Subsequently, the authors published a paper on the topic. It talks about the possibility of sharing the L1 caches between GPU cores.
Traditionally, GPU cores have their own individual L1 cache, while the L2 cache is shared among all the cores. The suggested model proposes that each GPU is allowed to access the other's L1 cache. The objective is to optimize the caches' use by eliminating the replicated data in each slice of the cache.
The results are pretty amazing. Across a suite of 28 GPGPU applications, the new model improved performance by 22% (up to 52%) and energy efficiency by 49%.
(In worst-case the performance drops by 4%)
(Area overhead is 0.09 mm2/core.)
The clustering of the L1 cache configuration is dynamic based on a sampling which determines how much clustering/pooling should happen of the L1 cache.