The PCI-E x1 slot has nearby two additional fan headers and also the CD_IN header:
One of the more recent audio CODECS from Realtek can be seen on this board, ALC898, which also supports Dolby Home Theater:
A Nuvoton NCT6776D Super I/O Chip can be located further on the left side of the PCB:
On the bottom of the PCB, we will find the following (from right to left):
-Power LED Header
-Chassis Speaker Header
-System Panel Header
-2x Chassis Fan Connector
-2x USB 2.0 Headers
-Clear CMOS Jumper
-Front Panel IEEE 1394 Header
-Infrared Module Header
-Floppy Connector
-Front Panel Audio Header
-HDMI_SPDIF Header
The ASMedia ASM1083 PCI Express-to-PCI bridge offers support to the two installed PCI slots on the board:
Between the first two red PCI-E slots we will find the CMOS battery location:
The PLX PEX8608 switch chip is located near the Z77 heatsink:
Also here we will also find the Dr. Debug LED display along with the UEFI chip: