obsidianram wrote: ↑
Sat Apr 20, 2019 11:08 am
I gather the upcoming Pi 4 line will be a completely new perspective on design. What I'm wondering is this: All boards up to this point have that Achilles' Heel of permanent, fixed memory of a given size. Now, a lot of people have Mb and Gb sticks laying around from previous desktop upgrades they're not using. Those could easily be put back into service if a "Raspberry Pi 4 'Nebulous'" with a SIMM/DIMM/etc slots were designed into a board, allowing users the choice of memory size to incorporate into a project. It would also help with recycling old memory sticks instead of them just getting tossed out. Different models would need different pin count slots, yes. Just curious how possible it would be, as the compelling need and demand is certainly present.
$20 Pi 3 A+
$35 Pi 3 B+
The Pi Zero is cramped to get more ram as the ram is part of the cpu package.
Pi 3 A / Pi 3 B (512mb / 1gb) is purely cost as pretty sure there are 12mm packages via micron all the way to 4gb.
Use zram and use a tiny bit of CPU power to get up to 300% ram up your swapiness and also the important page-cache set to 0
Or give https://github.com/StuartIanNaylor/zram-config
as practically every form of zram use in that install swap, dir, log and emphemeral system.
I am worried that the $35 mark will see raspberry skimp on ram with the Pi4 and there is a strange notion that the Pi4 is a product alone and not part of its range that starts at $5.
Pi 4 needs to be a new perspective on design and the great products already in existence and possible new often seen to be forgotten and that $35 mark would seem to collide with those products and limit market scope.
Personally I would be really happy to see a $50 top end Pi4 that does support ram, a high speed bus (m.2) and why upton doesn't like USB C just strikes me as strange and think the reality is price. Maybe comes underclocked but also has mounting holes for much better cooling and maybe goes past the 2.5A limit if you up the clock speed.
There seems so much focus on the Pi4 that hey with 22nm what about a Pi-Zero-2 also the 3-A / 3-B form factor that maybe there could be continuation and if production costs can be cut its very possible to maybe get a memory increase to 1gb/2gb which for those products would be great.
I have a horrid feeling that the Pi4 is not going to land where it should and cramp raspberries own product lines as yeah pi4 A $35 but pi4 B @ $35 is likely to make such concessions at a market point and with a product line that is a bad fit.
A big part of cost isn't the chips it is form factor and connectors and adding space for the connectors and the cost of connectors on a SBC probably isn't worth it to what could be a single 12mm package.
The ram allocation to CPU in the current line is pretty well matched and like said with zram can be extended especially with a few perf tweaks.
The 3A+/3B+ maybe if costs would allow 1gb/2gb but I do have this fear that the CPU in the Pi4 is going to be a really bad match because of ram cost that just will not fit in $35.
Would love to see a 22nm 512mb Pi-zero-2 as cpu wise the zero is just a tad lacking but there is still much you can do with much less ram than windows bloat dictates.
Pi3A+ is an amazing product just got one and perfect for what will be a magicmirror