After a very basic overclock (+120 clock, +1000 memory and no fine-tuning) I can reach 8900 in time-spy graphics score. But I can't go higher with fine-tuning on the curve. I've seen that the top score on 3dmark timespy, with same CPU and GPU, it's over 10'000 on graphics score but I can't explain myself how is that possibleGPU overclock won't make any more heat. You are limited to 115W just like me. You'll just get more frequency at a lower voltage. In the GPU tests the CPU isn't taxed at all, and the GPU temperatures are easy to keep in control. On mine OCing the Vram was the most performance/watt boost by a lot.
The free 3DMark tests are annoying. Unigine tests are better, especially Heaven which loops... and can be run in windowed mode which is great for tweaking settings on the fly.
8500 is more than I expected. Someone told me the 2070 model stock was about the same as my 2060 with the OC (~10% faster than the 2060 stock). 8500 is ~30% faster! That would almost be worth paying real money for