A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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Oldest I got is limited to 16GB (excluding rPis). My main desktop is limited to 32GB which is annoying, because I sometimes need more. But, I have a home server with 128GB of RAM that I can use when it's not doing other stuff. I once needed more than 128GB of RAM (to run optimizations on a large ONNX model, iirc), so had to spin up an EC2 instance with 512GB of RAM.
Wow, it's been a long time since I had hardware that awful.
My old NAS was a Phenom II x4 from 2009, and I only retired it a year and a half ago when I upgraded my PC. But I put 8GB RAM into that since it was a 64-bit processor (could've put up to 32GB I think, since it had 4 DDR3 slots). My NAS currently runs a Ryzen 1700, but I still have that old Phenom in the closet in case that Ryzen dies, but I prefer the newer HW because it's lower power.
That said, I once built a web server on an Arduino which also supported websockets (max 4 connections). That was more of a POC than anything though.
The beauty of self hosting is most of it doesn't actually require that much compute power. Thus, it's a perfect use for hardware that is otherwise considered absolutely shit. That hardware would otherwise go in the trash. But use it to self host, and in most cases it's idle most of the time so it doesn't use much power anyway.
What hardware are you using where the cpu says you are limited to 4gb?
Even a 25 year old Pentium 4 supports 8GB.
Negative, Pentium 4 was x86 and thus could only address 32 bits.
64bit CPUs started hitting the mainstream in 2003, but 64bit Windows didn't take off until Win7 in 2009. (XP had it, but no one bothered switching from 32b XP to 64b XP just to use more memory and have early adoption issues. Vista had it, but no one had Vista).