As you all probably know, the size of the monitor doesn't tell anything about how much the video card has to struggle. 1920x1080 gives the same load on a 15.6" laptop screen than on a 60" TV.
A high refresh rate like the 144 Hz in 38ruk's case will multiply the load by 2.4.
Getting a 4k monitor will quadruplicate the load.
38ruk, reading between the lines I understand that your eyesight isn't like that of an eagle any more, so turning AA off completely would not dramatically decrease the image quality. The pixel size on your screen is quite small so the sawtooth effect in diagonal lines isn't too drastic. If you can't see the grid on the screen, your built-in AA will take care of it. In any case, 8x is overkill.
Here's how AA works. This should be a solid black single pixel wide freehand diagonal line. See how it blends into the white background with the various shades of grey. Now image a single dot blending into a mottled background...
