Guess this got lost in the flurry today...
So, from piecing together what's known from the Nvidia hack and the Linux kernel commits (keep in mind that we don't know clock frequencies):
- T239/Drake's CPU core is presumed to be A78C. Reasoning: T234/Orin uses an A78 variant. Also, Linux kernel commits state 1 cluster of 8 CPU cores. There is an absence of additional code to support heterogeneous computing (mixed architectures/core types), so the likely assumption is that only 1 CPU architecture is being used. As far as off the shelf ARM cores go, A78C is the earliest that allows 1 cluster/8 cores.
Performance-wise... it varies according to the workload, but going by Geekbench 5, the A78 is about 2.5x as performant per clock as the A57 (the CPU architecture used in base Switch). Also, the base Switch uses 4 A57 cores, with 1 reserved for the Operating System and 3 used for games. With an 8 core configuration for Drake, our speculation tends towards 1 for OS/7 for games, but it's fair to consider the chance of 2 for OS/6 for games.
If you want to compare against PS4 (Jaguar) or PS5 (Zen 2): A57 should be slightly ahead of Jaguar? So A78 stays at least 2.5x performant per clock compared to the Jaguar. The A78 is also actually slightly ahead of (monolithic) Zen 2 in Geekbench 5 (again, on a per clock basis). I think that the PS4 makes 6 or 6.5 cores available for games? And apparently the PS5 makes 6.5 cores available, according to Digital Foundry's video on Gotham Knights.
Do keep in mind that Geekbench 5 is more relevant for performance as a 'general computing device' than 'dedicated gaming device'. But nevertheless, A57->A78 is a giant leap.
- The GPU is 12 SMs of the Ampere architecture, according to the Nvidia hack. Don't worry about what SMs are; just treat them as building blocks/units to roughly approximate the size. The Switch is 2 SMs of (somewhat updated) Maxwell. Right off the bat, the GPU is six times as large. If clocks are the same, that's 6x raw grunt before taking into account improvements from changes in architecture and additional features. And going from Maxwell to Ampere is a major leap in architecture and featureset.
Uh, for comparison against PS4 (GCN) or PS5 (...glorified-RDNA1?), someone else can handle that.
- As far as RAM goes, we're looking at a 128-bit bus width and most likely LPDDR5, with a long shot of LPDDR5X. To compare, the base Switch uses 64-bit LPDDR4/4X (regular 4's been phased out, so it had to change to 4X eventually; no change in clocks)
Assuming LPDDR5, we're looking at up to 102.4 GB/s memory bandwidth and a minimum quantity of 8 GB. Base Switch has bandwidth of 25.6 GB/s and a quantity of 4 GB. The memory bandwidth will go from 'is typically a bottleneck for the Switch right now' to 'depending on CPU/GPU clocks, it's probably actually fine'. And when I say minimum quantity of 8 GB, I mean that the smallest option offered by RAM manufacturers to fill a 128-bit wide bus with regular LPDDR5 is 8 GB (it'd be a pair of 64-bit 4 GB modules). Btw, the next step up is not 10, but actually 12 GB (a pair of 64-bit 6 GB modules).
- Takeaways:
You can assign Drake the task of serving as the Next Generation flagship of Switch style devices, and it is absolutely capable of executing that task.
If you want to do a comparison to other systems, I like to think of the (docked) floor as being a modernized and somewhat better PS4 (...PS4.25?), and the ceiling as 'what if the PS4 Pro's CPU didn't suck' (ie, a hypothetical PS4.5).