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Soundwave on 21 September 2023
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Doctor_MG said:

I think what will occur this time that didn't occur with the Switch is a semi-custom APU. One that won't release in other Nvidia products. I've been saying this from the start. So far, the leaks have confirmed this is likely true. T239 features 8 cores in a cluster vs 4, and will feature just one cluster instead of three. In addition, sources suggest that there will be Lovelace features, so it may be a bit of a hybrid between Ampere and Lovelace.

This means that cross comparisons to other Nvidia products is going to be difficult. For example, many people are looking at the T234 and it's 50W for what we should expect, yet the less clusters you have generally the less power you draw. So they may not have to cut back as much as predicted to get the desired power draw.

You can see Lovelace features in one of the Nvidia leaks .... it references "NVENC version 8" on the Tegra T239 ... what is NVENC? It's Nvidia's video playback/recording feature, it's used in Switch games for things like Smash Bros. replays and video capture on the right Joycon. So what's significant about that? Well Version 8 is a Lovelace feature (40 series Nvidia GPUs), regular Nvidia Ampere cards use version 7. So that means the Tegra T239 is using the Lovelace version of this (and who knows what else) whereas other Ampere GPUs don't. 

Also it should be noted like there is no cut down version of the Tegra T239 in any of the Nvidia leaks. It's Tegra T239 and T234 is the full fat Orin for self driving driving cars ... the T239 is already cut down/customized from that. If there was another version of T239 or T234 it should show alongside those two but there isn't.

This guy had a detailed look at one of the Nvidia leaks, note he won't talk about the other one (which confirms 1536 CUDA cores + 12SM for Tegra T239) because the other leak was basically illegal stolen from Nvidia, so just keep that in mind, you can find the exact CUDA core number, he just doesn't want to say it because it was stolen information. 

Last edited by Soundwave - on 21 September 2023