4 ms·
So do they have dedicated raytracing units sitting in the pipeline that is not used when the game does not utilize raytracing ???.
by tibbydudeza 3y ago
So do they have dedicated raytracing units sitting in the pipeline that is not used when the game does not utilize raytracing ???.
- reroute22 3y agoWe don't know anything about Apple's implementation, but for perspective, in Nvidia's first implementation of RTX RT cores occupied about 6-7% of the area of a TPC, where TPCs constitute the majority, but not the entire die, so it's an even smaller (but not by much) portion of the entire die. Maybe 5% or so. It's possible that the latest gen of RT cores are a slightly larger portion of a TPC (but we don't know), but on the other hand, TPCs are a smaller portion of a die now as TPC arrays do not include L2, and L2 got many times bigger. So chances are, RT over die area is still somewhere on the order of 5%. And in Nvidia designs as far as I understand RT cores sit idle in non-RT workloads, yes. If anything, Tensor cores are almost twice as large as RT cores, and tensor cores sit idle whenever you don't use DLSS (or professional ML compute). See https://www.reddit.com/r/hardware/comments/baajes/rtx_adds_195mm2_per_tpc_tensors_125_rt_07/ https://www.reddit.com/r/hardware/comments/baajes/rtx_adds_1...