Regarding 8GB RAM, I personally have never tested, but some users have confirmed to me that 8GB of RAM is supported.
Important thing is that your Hardware is supported, mainly you need to set IDE compatibility on the Bios, use the video mode "VESA" if your video card is not supported, and finally check if the LAN and WiFi network are compatible
I attach links where you can check the compatibility of your Hardware:
https://en.wikibooks.org/wiki/Aros/P...ete_System_HCL
I would like to remind that AROS One is a Free Distribution and everyone can contribute to its improvement !!!