The i7-2600K (Sandy Bridge) benchmarks at ~5000 on Passmark, and the i7-10700K at about 20,000. So it seems they've had quite a bit of improvement. Note this is going from 32nm to 14nm.

Intel is in a really bad place now (in a forward-looking sense), primarily due to their fab process falling behind TSMC and others. You can't design your way ahead while using old manufacturing technology

https://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i7-2600K...