How Many Particles

I am currently making a game which will have lots of fire effects at the same time. I am wondering how many of these I can have before I can expect some Frame Rate issues. I know that system specs will affect this but just try to give me an average please.

Also is there any way I can optimise it so that I can have more? I am looking for a solution which doesn’t require C++ coding.

I can make the game without lots of fire but I would prefer it with fire, so if there isn’t a way then I can work around it.

Edit: The fire effect is the one that comes with the starter content, however I have removed the smoke from it