SMCGS5/8 Heat Sink Query

Q: Why SMCGS5 has heat sink but SMCGS8 don't have?

A: GS5 is single solution. The chipset temperature is higher than 70 0C. So we put heatsink on GS5.

But GS8 has two chipsets. The temperature is lower and acceptable. We didn’t put heatsink on GS8. The following is Thermal test result of GS8 for your reference.