Any FPS advice?

I used to run Enderal on my good laptop (but now it kicked the bucket) I now play a mini dell optiplex 9020 with a intel core I 5, 16 gram and intel integrated graphics (which I plan to add a real GPU soon)

But for the mean time any mods or advice to get 40-60 fps instead of the sub 30 fps on low graphics and 720p.

The only way so far I get good fps is via non-full screen.