Shucky boye
Terrarian
Oh trust me,i have seen people with that little ramWell that can't be right. Unless the guy's still using XP, almost any OS is going to use like 2 GB passively. Ten years ago, a pre-built computer would have had 8 Gigs of RAM, I think, and a typical home-use OS prior to Windows 8 would cap the amount of RAM you can access overall, so it's not necessarily beneficial to buy a ton of new RAM for an old system.
What you could do - and this really depends on your bottleneck - is buy some RAM with better speed and CAS, and then overclock your RAM in your BIOS. To do that you'd have to know your systems specs and make sure you're not going to have problems, but it's possible that with faster RAM you might be able to process everything before you run into that wall.
It's probably not worth upgrading or building a new rig just for a Terraria mod, though.
And terraria being ram limited isnt something we can fix, do we?