cryptohunter
Posts: 39
Joined: Wed Apr 05, 2017 5:56 am

Memory expansion for RP2 / RP3

Wed Apr 05, 2017 8:47 am

Hi there,

just a quick question concerning the possibility of
expanding the memory on the RP2 and/or RP3.

Are there any reasons why i couldn't expand the memory
to 2 gig or 4 gig ? For example firmware limitations or
chip specifications or space or on the RP board ?

Thanks to all who answer :-)

Have a nice day

cryptohunter :)

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PeterO
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Re: Memory expansion for RP2 / RP3

Wed Apr 05, 2017 8:57 am

Did you trygoogling for an answer ?
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jahboater
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Re: Memory expansion for RP2 / RP3

Wed Apr 05, 2017 9:03 am

cryptohunter wrote:Hi there,

just a quick question concerning the possibility of
expanding the memory on the RP2 and/or RP3.

Are there any reasons why i couldn't expand the memory
to 2 gig or 4 gig ? For example firmware limitations or
chip specifications or space or on the RP board ?
No (chip limits).
Why do you need more?
The Pi is intended for people learning to program and other fairly small projects and if you are writing code yourself 1GB is huge (apart from any data of course). If you are trying to build a large existing project, all in one go, with many millions of lines of code (such as the kernel or gcc say) with many simultaneous compilations, you might exceed 1GB and need to add swap space. Otherwise keep the number of tabs down in the browser!

jamesh
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Raspberry Pi Engineer & Forum Moderator
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Re: Memory expansion for RP2 / RP3

Wed Apr 05, 2017 9:09 am

cryptohunter wrote:Hi there,

just a quick question concerning the possibility of
expanding the memory on the RP2 and/or RP3.

Are there any reasons why i couldn't expand the memory
to 2 gig or 4 gig ? For example firmware limitations or
chip specifications or space or on the RP board ?

Thanks to all who answer :-)

Have a nice day

cryptohunter :)
No, for a number of reasons.

Chip doesn't support > 1GB
Firmware needs to have tables of timings for RAM chips, so an unrecognised one won't work.
Unsoldering the existing RAM and replacing it with one with the same pin out would be really difficult.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
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jahboater
Posts: 5756
Joined: Wed Feb 04, 2015 6:38 pm
Location: West Dorset

Re: Memory expansion for RP2 / RP3

Wed Apr 05, 2017 9:16 am

If you do get short of memory, there is a Lite version of Rasbian with no GUI (often used for headless installations) that is rather smaller.

cryptohunter
Posts: 39
Joined: Wed Apr 05, 2017 5:56 am

Re: Memory expansion for RP2 / RP3

Wed Apr 05, 2017 9:34 am

thanks guys for your replies... much appreciated :)

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solar3000
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Re: Memory expansion for RP2 / RP3

Wed Apr 05, 2017 1:44 pm

Yes, you can. With tunneling pico-bots.
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W. H. Heydt
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Re: Memory expansion for RP2 / RP3

Wed Apr 05, 2017 5:10 pm

The basic answer (and why has been given). However, I think there is a *possibility* that a future iteration of the Pi2B *might* find itself with more RAM... My reasoning is this: The v1.2 version of the Pi2B has the BCM2837 from the Pi3B. Should a future Pi SoC be able to support more RAM, it is conceivable that a revised Pi2B--v1.3, v1.4....--could then be given more RAM. I see much lass chance of that happening to the Pi3B unless some successor board changes one or more connectors (possible) or rearranges something external (as was done with the indicator LEDs going from Pi2B to Pi3B). In that case, a corresponding revision to the Pi3B could occur.

In any case, that is all speculation (not even on my "wish list") and won't happen for some time (the *minimum* time frame being a couple of years, but more likely closer to 5 years, I think, if it happens at all).

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