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[Bofferbrauer2]

HoloDust said:

Bofferbrauer2 said:

There are other and better alternatives than this. For doubling the bandwidth you'd need to thicker boards made of more layers, which strongly increases their price. It's one of the reasons why entry-level GPUs come with such small bandwidths

• HBM: Would eliminate the bottleneck but at a hefty price, so probably not worth it
• GDDR7: Would be very fast, but capacity could be a concern.
• LPDDR5X: Samsung is now producing LPDDR5X-9600 memory, which would strongly increase the bandwidth over the LPDDR5 memory in the Steam Deck with minimal changes
• DDR6: Expected in 2027, it increases bandwidths considerably as it comes with speeds ranging from DDR6-8800 to DDR6-17600. So if there's no successor until then this could be a very viable option.

So yeah, there are a lot of alternatives, some more sensible than expanding the bus to 256 bit.

I think Samsung is already manufacturing LPDDR5X-10700. That would give mobile devices ~171GB/s on 128-bit bus. My guess - it's very expensive.

If they do, then it's still experimental, as even sample production sizes are not available above LPDDR5X-9600 right now: https://semiconductor.samsung.com/dram/lpddr/lpddr5x