Oh, I was kind of hoping for a link where Connect3d GTO users were posting their results. I was able to get my GTO2 up to 600 core and 600 on the MEM too but I didn’t try it at the same time nor did I test for stability at those speeds. 540/590 is rock solid though, stress tested and bested. All with the stock cooler. Personally, I would prefer a guaranteed X850XT PCB (with power connector) and R480 core with 1.6ns RAM then,….whatever you might get with the luck of the draw,….but if it will get you to where you want to go,….its all good IMO.