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by ben-schaaf 37 days ago
That's not a radiation hardened chip, it's regular off-the-shelf consumer electronics. The "solar radiation" test they advertise is part of MIL-STD-810H. It tests whether the electronics survive regular sunlight on earth. The only ionizing radiation this phone is rated for is UV light.

At least if it had registered memory there might be an argument that it has some radiation resistance, but no it's plain old LPDDR4x.

Ulefone Armor 29 Ultra has the same MIL-STD-810H conformance with "radiation hardening", 16GB of RAM and a flagship Dimensity 9300+. Just not a removable battery.
1 comments
lightedman 37 days ago
"The only ionizing radiation this phone is rated for is UV light."

Yet it is currently working just fine recording video inside of our rad/AtOx chamber with multiple Strontium-60/Barium-137 sources surrounding it.

"LPDDR4x."

Wrong. LPDDR5 and it has its own error correction features (not as robust as ECC but it's still there.)

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ben-schaaf 37 days ago
> Yet it is currently working just fine recording video inside of our rad/AtOx chamber with multiple Strontium-60/Barium-137 sources surrounding it.

That's really neat, but doesn't contradict anything I said.

Also do you perhaps mean Strontium-90? ;)

> Wrong. LPDDR5 and it has its own error correction features (not as robust as ECC but it's still there.)

Their product page lists LPDDR4x: https://www.kyoceramobile.com/rugged-devices/duraforce-pro-3. Unless you have a better source I'm going with the manufacturer on this one.

> it has its own error correction features

Source?

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lightedman 37 days ago
>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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ben-schaaf 37 days ago
> Funny because the Qualcomm sm7450-ab snapdragon 7 gen-1 page lists itself as only supporting LPDDR5.

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.

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