There are four cressets help users understanding the situation of VGA card,
the farthest from the motherboard is cresset 1; the nearest from the
motherboard is cresset 4, please refer to the attached picture.


Each cresset represents the following meanings:
Cresset 1--- When the cresset light up, it represents the first 6 PIN additional power
on the VGA card did not install properly.
Cresset 2--- If the GPU is abnormal, the cresset will light up.
Cresset 3--- When the surface temperature of GPU on the VGA card is over
105 celsius, the cresset will light up to warn the user and then shutdown
the computer automatically.
Cresset 4--- When the cresset light up, it represents the second 6 PIN additional power
on the VGA card did not install properly.