In beta phase 1 the variable frameratecap could set your max FPS ingame. Now with the EU servers running again, I experience that that variable doesn't work anymore.
Now I've 100+ fps which overheat my GPU and the rest of my laptop.

Does the variable still work for you?
Or does someone know that the variable got a new name?

Go to options and activate Vertical Sync.

Then your FPS won't go over the Hz you have on your monitor(Which is 60 in most cases).

The frameratecap feature will come back with the next patch (patch 18).
Source
Btw, the cap doesn't work in the editor anymore, too. A fix would make sc2 be playable on my laptop again