Try to only game when the laptop is plugged into an outlet. Running on battery slows some laptops down. Make sure Windows power settings are set for maximum performance, not 'balanced' or a battery saving mode. Keep the laptop cool, if it detects it's getting hot it might throttle performance. Make sure all unnecessary Windows services and processes are shut off. Run games in their lowest DirectX mode. Some games can run in DX 10 or 9 rather than DX 11 or 12.