Hi, I have and use the Old PC from the 2010.
The Specs are as follows:
- 2GB+1GB DDR3 RAM;
- 4GB to Swap (Barely swap is used);
- AMD Sempron 145
- Integrated Graphics - AMD RS780L (Radeon 3000)
- DE: GNOME
- 500 GB Seagate HDD
When I first installed Manjaro, I had only the 2GB Stick and was comfortable running GNOME with surfing the web with Firefox, compiling small programs, Playing Movies and etc. Then, after a few months later, gradually as I increased to use more programs and made to run simultaneously side-by-side, the lack of memory was made clear, as the programs couldn’t run as fast as they did earlier.
So, I decided to increase RAM for my PC so, I "borrowed" a Gig of RAM from my friend so that my PC could get a bit better. With the 3GB of RAM, now my PC is so much better. That 1GB of RAM really did made a world of difference, as my booting time significantly reduced and programs are more responsive than before.
As my 10 year old processor still possess a hindrance, frequently my CPU Usage shoots straight up to 90%+ when attempted to play a 1080p Video running in the background, with 3/4 Firefox Tabs, 2/3 Terminal Windows, 1/2 Gedit text editor windows. Well, when I attempted to just run a 1080p video, the CPU Usage just climbs to 50% - 60% and struggles to play it in Full screen with the Frame drops are so intense and screen tearing.
So, my point is Manjaro is a great distro. I choose Manjaro as I liked it and suits me well. I try sometimes the other distros with live booting, yet, they don’t make me feel as Manjaro. With Manjaro, I feel at home. And, it’s my personal opinion. That 1GB lender friend, runs his laptop with Parrot OS, feels comfortable with the Parrot OS. Everyone is unique and have different needs and uses.
For your specs, 1st try our Manjaro, then maybe, Arch, Debian, Peppermint OS, Puppy Linux, or ever Arch Labs / Bunsen Labs.