Graphics card driver crashes in custom mode (Razer Blade 14)

Hello! :) Please excuse my english. My problem looks like this: If I set the CPU and GPU performance to "Boost" (CPU) and "High" (GPU) in Synapse and start a game, it crashes after a few minutes (mostly graphics card driver crash). But a benchmark like Firestrike runs smoothly and doesn't crash. Is there a solution for this? It's a Razer Blade 14 (2021) with an RTX 3070 and a Ryzen 9 5900HX. Thanks!