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by lightedman
52 days ago
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>Their product page lists LPDDR4x Funny because the Qualcomm sm7450-ab snapdragon 7 gen-1 page lists itself as only supporting LPDDR5. >also do you mean perhaps Strontium-90? Nope. Strontium-60. 25 year half life compared to Sr-90's ~29. It's what we like to use in real space-environment testing on the ground. Nasty stuff. >source? You can actually probe your hardware and see what sort of ECC is enabled on a Droid phone. In this case, in-line ECC, so that means some of the RAM is actually sacrificed for error correction instead of having a dedicated extra chip (256 bit, 240 of that is data 16 bit is error correction.) What's awesome about that is that enabling ECC is simply a bit flip in firmware and you don't need the extra RAM modules installed - the installed memory can already do it. You don't need the extra hardware. |
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Those pages contain scarce technical information, it would be silly to say that anything not listed there is explicitly not supported.
Qualcomm's leaked datasheet says it supports lpddr4x: https://www.scribd.com/document/868805341/80-26135-1-AE-SM74...
> Nope. Strontium-60. 25 year half life compared to Sr-90's ~29. It's what we like to use in real space-environment testing on the ground. Nasty stuff.
Strontium-60 doesn't exist. It falls completely off the isotope table (https://inframatterresearchcenter.org/IsotopeTable.html). Strontium-82 has a 25 day half-life.
> You can actually probe your hardware and see what sort of ECC is enabled on a Droid phone.
Care to share how? I wasn't able to find anything on the internet and I'd love to know whether my phone has some limited ECC.