Rob Kelz
Posts: 2
Joined: Wed Oct 31, 2012 12:12 pm

How to tell the difference 512mb model b

Wed Oct 31, 2012 12:18 pm

Hi I just got my first Raspberry PI and I was wondering how I can tell if it is a 512mb model?

I have been told to look at the chip and if it says 4G it will be 512mb model but I cannot read the chip as it has a heatsink on it?

Many thanks in advance,
Rob

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liz
Raspberry Pi Foundation Employee & Forum Moderator
Raspberry Pi Foundation Employee & Forum Moderator
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Joined: Thu Jul 28, 2011 7:22 pm
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Re: How to tell the difference 512mb model b

Wed Oct 31, 2012 5:32 pm

Download the new firmware (it's on the downloads page - link at the top of this page) and you'll be able to see how much RAM you have.
Director of Communications, Raspberry Pi

Joe Schmoe
Posts: 4277
Joined: Sun Jan 15, 2012 1:11 pm

Re: How to tell the difference 512mb model b

Wed Oct 31, 2012 6:35 pm

Note that there was some confusion regarding the various methods of "detecting RAM size via software (i.e., from within the OS)". Specifically, a) you had to be running the latest firmware and b) there was some chatter to the effect that the "Revision" thing (in /proc/cpuinfo) wasn't reliable because it wasn't set right in some production runs (and/or that it was being fudged in software).

For these reasons, I share the OP's concern that it would be nice if you could tell (definitively!), from the outside, what the hardware is. I, too, tried to read the markings on the chip, but could not do so, even with a magnifying glass. Note: My machine is a 512M, of this I am quite confident, so I'm not looking for help on that score, but, as I say, it would be "nice" if the "reading the chip" method was reliable. Maybe I need a higher power magnifying glass...
And some folks need to stop being fanboys and see the forest behind the trees.

(One of the best lines I've seen on this board lately)

lordloh
Posts: 13
Joined: Thu Sep 13, 2012 11:27 pm

Re: How to tell the difference 512mb model b

Wed Oct 31, 2012 10:56 pm

just wondering, what does

Code: Select all

free -m
tell? Will that be accurate?

Narishma
Posts: 151
Joined: Wed Nov 23, 2011 1:29 pm

Re: How to tell the difference 512mb model b

Thu Nov 01, 2012 1:17 am

It will only be accurate if you have the latest firmware installed.

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