Issue with Niagara particle count

Hi there! I’m new to this forum and a beginner in studying vfx in UE (at the moment I’m studying on Udemy, Idk if I can put the course or creator’s name).
I’s so sorry to begin with a request for help, but I have to overcome this issue asap.
So, that’s the problem: I was creating a portal VFX, when creating a new emitter in my Niagara System, no particles were spawned.
I tried disabling one emitter (the one with most spawn rate) and the new emitter begins to work.
So, I checked my vram usage, and it was 4,8 out of 6 GB (I have a gtx1660).
The question is: can I resolve without changing my gpu? I can’t afford a new one at the moment…

Thanks to everyone that will read!