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A comment on You’re paying too much to get a little more space on your iPad and iPhone. Parent comment

Re:You’re paying too much to get a little more space on your... by ars on Sunday July 15, 2012 @10:01PM (#4248978)
Usually you leave an empty space on the board to be filled with extra memory for the higher version. (And for some devices there are services that will solder in a chip for you in that spot.)

It's not typical to use different density chips since then you have to tune the rest of the system to match, and that's more complicated.

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Re:You’re paying too much to get a little more space on your... by zdw on Sunday July 15, 2012 @10:15PM (#4249009)
If SSD logic boards are any indication, devices with fewer chips frequently have lower read/write speeds, as they're not using all the lanes on the controller.

I'm thinking this would be the case as well on a tablet, unless the flash is in a bus topology already.

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Re:You’re paying too much to get a little more space on your... by mbell on Sunday July 15, 2012 @10:56PM (#4249089)
> I'm thinking this would be the case as well on a tablet, unless the flash is in a bus topology already.

There is no speed difference between 1 or 2 chips in this context, they are just treated as separate banks and mapped to different memory addresses controlled by the flash memory controller in the SoC.

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