CPU or GPU is more important?

[15JG52_Brauer]

Just changed land to high and put cpu back to stock clocks - no noticeable change in fps - still around 45 fps on London free flight (first minute of track - tir turned off, auto pilot on to get repeatable benchmark) - GPU now using nearly 1.5 gb memory - no stutters (Have 2x60gb ssd's in raid array - maybe they are helping as I've not had the microstutters at all).