Acer G520 series manual System tour, Description, CPU 1 fan header, CPU socket, CPU 2 fan header

16	1 System tour
Item	Description
US	CPU 1 fan header
T	CPU socket 2
UT	CPU 2 fan header
V	ATA power connector
W	BIOS select jumper
X	IPMB connector
Y	Floppy drive connector
Z	Primary and Secondary ATA connector
AA	Front system fan header
BB	Front panel connector
CC	Front panel USB header
DD	ARMC connector
EE	SATA A1 and A2 connectors
FF	Intel® 6300ESB ICH (ICH5 HR)
GG	Chassis Intrusion header
HH	Jumper Block
	1-3 CMOS Clear
	5-7 Password Clear
	9-11 Recovery Boot
II	Serial B header
JJ	SCSI LED connector
KK	Battery