QDI Superb 4L Manual page 6

Note:
This manual is suitable for mainboards of Superb 4L se-
ries. Each mainboard is carefully designed for the PC
user who wants diverse features.
S4L: without onboard Audio and onboard LAN
S4L-A: with onboard Audio
S4L-L: with onboard LAN
S4L-AL: with onboard Audio and onboard LAN
Caution
Be sure to add some Silicone Grease between the CPU and the
heatsink of FAN to keep them fully contact , meanwhile to meet
the heat sink requirement.