I agree with The Beast however 10-20% doesn't make 40fps turn into 60fps. However, any gains within this 40-60fps range are worthwhile. Sadly however, at least with the RTX 30 series, say a 3080, 10% gain is possible, but not much over that. For those interested, in the example below, I've tried to make the difference as apparent as I can. Back to back comparison below using 320w with reference 1710mhz 3D/boost clock, versus my 400w 100% stable OC gaming profile, representing 2 ends of the spectrum. 50fps vs 56fps (just for a moment it happened to show 57fps when I took the screenshot but it was mostly sitting at 56). This represents a 12% gain. Of course however, if you buy a high-end 3x 8pin RTX3080, your starting point also isn't 320w power limit, nor is it a 1710mhz boost clock. In my example, default out of the box profile was sitting at 53fps. So then, in this case, this would only be a 6% gain for my particular product. Is it worth OC'ing then? Yes, when it brings the experience closer to 60fps, it's noticeable enough to be worth doing.