JRPGfan said:
sc94597 said:
TFLOPs are not a useful metric when comparing between different architectures.
For example,
The PS4 Pro was capable of 4.2 (GCN) Tflops and the Series S roughly 4.006 (RDNA2) Tflops. The Series S obviously is a more capable system for the task of running modern games. Besides, 2Tflops would mean the Switch 2's GPU would run at something like 650 Mhz in docked mode, which is way too low. That's less than Digital Foundry downclocked their 16SM RTX 2050 (downclocked to make up for the fact that the Switch 2 only has 12SM) in their Switch 2 performance simulation. Realistically, we're looking at a minimum of about 800Mhz - 1Ghz in docked mode, which gives about 2.5 - 3 Tflops.
The original Switch was mostly bottlenecked by CPU and available memory capacity. Neither of these are as prominent issues for the Switch 2. The Switch 2 will (if leaks are accurate) have more available memory than the Series S, and the CPU is more adequate than the Switch's was, relatively.
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Switch runs at 768mhz when docked, on the gpu.
I would expect them to stay in the same range, to keep performance pr watt high.
Going broad with many cores at lower clock speeds, to keep power usage as low as possible, compared to performance.
You might be right, at around 800mhz or something (since there been shrinkage in nodes since to the switch).
And yes, going from 25.6GB/s to 120GB/s in memory bandwidth, is going to have a massive performance impact at these higher resolutions the Switch 2 will run. Same with it getting a much more capable cpu.
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The original Switch eventually had a peak mode that went up to 921mhz. This was relaxed as Nintendo became more familiar with a chip they inherited, and they wanted to stabilize performance in games. They aren't inheriting a chip this time around, Nvidia is designing one specifically for them. If we go with the original Switch's clock rates, we're looking at 1.38 Tflops in handheld mode, and 2.8 Tflops in docked mode for Switch 2.
Misremembered, Nintendo only loosened handheld clock rates up to 450Mhz, 921mhz was done with mods and overclocking.
There is a limit to how low you can clock and still get efficiency gains. Thraktor on famiboards calculated it, based on the T234's power-voltage function, to be around 480Mhz. Anything below that would mean you should go with an 8SM instead of 12SM chip that is clocked higher.
There is also evidence that Nintendo might allow the Switch 2 to run at higher TDP's, given that it seems like the cooling system is beefed up compared to the original Switch.
Last edited by sc94597 - on 02 January 2025
