I do not own a N800 yet but i will in a few months, i just would like to ask if its possible to upgrade ram (custom mod, i know it will probably break warranty), and if i can get a full 8 gigs in the N800 with two 2 gig SD cards. Also any tips, tricks, hints, and technical talk that you have for me will help so much. I will be using it for mp3s, myspace, facebook, msn, gtalk maybe, map program, taking notes in class and gameboy advance emulator. Tips or tricks please

You can get a full 16 gigs with two SDHC cards. Either the upcoming OS update will support it out of the box, or you can apply a patch. When 16 gig SDHC cards become more routine, you will have 32 gigs available.

I don't know about the internal memory, but I don't think you need to. I rarely have memory issues with the n800 and the applications I use on it. Even with many windows open. You can extend the memory to one of the memory cards as well.

I have a 4GB sd card (not SDHC) and it works just fine, shows up as the full 4GB without any patch straight out of the box.

@Snake92:
You can't add more internal RAM, but the 128MB available seems to be quite sufficient. I've yet to run out of memory in the 6 months I've had my N800, and I haven't even activated additional swap space ("virtual memory" in Microsoft-speak, although that's incorrect terminology -- it's all virtual memory (RAM+swap) as far as the N800 applications are concerned.)

There's also internal 256MB of flash, in addition to the two SD slots where you can add lots of extra storage (as descibed by the other posters). The internal flash uses a compressing file system, so it's quite a bit more roomy than it looks. Part of it holds the built-in N800 applications and utilities, but I also keep lots of other stuff there (including maps and images cached by maemo mapper, and many 3party extra applications) and there's still 70MB free.

Storage capacity thanks to the two sd card slots is huge especially since it runs linux and with a simple kernel hack you can support sdhc cards - this will presumably become a standard part of the os with time.

As previous posters have mentioned 128MB internal ram is sufficient.

I've thought of trying to solder more ram into my 770. With os2005, there was enough ram out-of-the-box, but ever since os2006, you kindof need swap. It's possible that if you do solder some in and get the right ram and solder it in place without any mistakes, there'll be no place to hang the extra address line. It's also possible that some core bit of Nokia closed-source software hard-codes the amount of memory for each device (770, n800) so that even if you do find an address line for it on the arm9, it'll never be recognized (havn't looked into it, but the part that talks to the mmu could be closed - anyone know?). That's the nasty thing with closed-source software lingering about alongside linux. Don't really have the freedom you thought.

/end rant

I haven't looked, but I doubt the kernel is using closed-source code for the MMU handling (or any other core function -- it's only loadable drivers that can (barely) sneak out of the GPL requirement).

The kernel can limit the memory it uses, with a kernel parameter. There shouldn't be any reason to use this parameter in the default IT boot configuration, but in any case it's easy enough to change that, if so.

On the other hand, for all I know there could be hardware limitations in a 770, but at least from a kernel point of view I don't think there's anything to stop you from soldering in more RAM, if you can figure out how..