It's also interesting to see how the 4123 driver brings with it an increase in power consumption for the Intel cards. Not by much – the A770 draws just 7.5W more at 1440p with the 4123 driver than with 3491 – but there were a number of occasions across the 12 games where a large performance increase had a direct correlation with a power draw increase, suggesting the GPU wasn't being fully utilised previously.