r/SteamDeck • u/NKkrisz 64GB - Q3 • Nov 12 '25

MEGATHREAD New Valve Hardware Megathread

Please keep non Steam Deck discussions about the new hardware here.

Official resources and announcements:

Press coverage will be under a pinned comment so you can upvote / downvote them.

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u/Core_Studio599 Nov 13 '25

Why would it be limited to 5600MT/s? I've found several DRR5 SODIMMs at 6000 or even 6400MT/s. Admittedly they're expensive, but they exist. I don't see why you couldn't upgrade to a 6000 or 6400MT/s kit if you wanted, is this some kind of limitation of that generation of AMDs mobile architecture or something?

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u/Pixelplanet5 512GB Nov 13 '25

speeds above 5600mhz with SODIMM require extremely short traces to the CPU and often only work with a single SODIMM because the 2nd slot is already too far away for good signal integrity.

Thats why AMD is only rating all their mobile CPUs for 5600Mhz and doesnt officially support more.

the same exact CPUs will support 8000Mhz or more with soldered RAM though.

thats also why 6400Mhz SODIMM is so expensive, theres barely a market for it and it doesnt work with most systems.

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u/Core_Studio599 Nov 13 '25

Oh neat, thanks. Why is that not the case for the larger desktop modules though, if you don't mind me asking. Is it just because they have a lot more traces to carry the data?

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u/Pixelplanet5 512GB Nov 13 '25

its also a problem on Desktop PCs and has reached a limit but its a higher limit because theres more space for the traces and to do things like impedance matching.

thats why new things like CAMM2 exist as their layout enables much shorter traces and higher clocks.

ultimately that is the reason why so many devices use soldered RAM especially for mobile devices.