Ok RMA issued to me now, fingers crossed I get a new one quickly and don't have to wait ages.
When I get a new card that works, I can see for myself how the CPU's compare with it, what I can tell you though is that the 1080Ti is held back a bit by the Ryzen 5 3600 compared to the i7 10700, as I have both here I can see this quite clearly, it does rather depend on what game and resolution you go for though, obviously games that lean more on the GPU are closer, games that really do benefit from more CPU grunt to keep the GPU fed and already run at high fps, perform quite a bit better on the 10700, in all cases I have observed though it's a case of from high to higher though, these are pretty fast systems we're talking about all said and done and you could fully enjoy any game I have tried with either, but it's just interesting to see even the old 1080Ti does have headroom to unlock by moving to something faster than a R5 3600, which itself came out after the 1080Ti. I like 'balanced' systems generally and I do think people sometimes under estimate the importance of the CPU, it's not all about the GPU at all, everything is important and will make a difference to the experience you have, weather that difference matters or not though is the question I suppose. I imagine most people are not too fussed about the difference between 120fps on the 3600 and 150fps on the 10700, however that difference does mean to some you can hit your magic 144fps and stay around there.