At 1440p it's probably going to push your gpu harder than your cpu. As resolutions increase the load falls more on the gpu. Each game is different though as far as cpu utilization, you'd have to use something like msi afterburner and set the osd to show cpu core usage and watch the values. That would be the best indicator and you can set it to watch cpu cores, gpu usage, vram usage etc.
Unless a synthetic gaming benchmark can mimic a wide variety of games it won't be nearly as conclusive as your own testing with an actual game. Crysis 2 uses the cpu differently from skyrim, differently from cod ghosts and so on.