Low FPS in game

I've sometimes had luck with minimizing windows that are open on other screens and disabling vsync.

Zero K need cpu with good one core performance as it use only one core. Maybe your cpu is too weak for this game. Post your system specification at least. Zero K dont 'eat' so much graphic card as cpu.

Zero K spring support multicore cpus?

I have a all in one.
Intel hd graphics family 2000
1 TB DISC
4 GB RAM DDR3
AND I3 2100

That looks like an old laptop. We don't support integrated graphics so whatever you've got in terms of FPS is probably the best you are going to get.

I have basically the same CPU and spring runs more or less fine (subject to whatever deoptimizations the latest engine offers), however the engine offers zero support for integrated GPUs so what you actually get is software rendering mode. Software rendering mode is not only slow, but most effects are broken and even terrain rendering is seriously bad. You cannot see weapon craters in software mode, nor can you see the dirt hills left by dirtbags.

Note that even if you get a real gfx card spring still runs pretty slow, due to cpu stalls caused by various bad design decisions. Lately (since 100.0 or so) I've had issues with spring randomly freezing up for like 30secs to a minute, and of course if there are a lot of units (ie clusterfuck) it runs at like 3fps due to the huge number of draw calls eating all your cpu (rather than gpu) time.