Datasheet

24
Chapter 1
N
Personal Computer System Components
TABLE 1.1 Socket/Slot Types and the Processors They Support (continued)
Socket/Slot Processors
Socket F (Socket 1207) Replaces Socket 940 when used with Opteron multiprocessor
systems—LGA packaging
Socket AM2 AMD single-processor systems, 940 pins (not same as server-
based Socket 940), replaces Socket 754 and Socket 939
Socket AM3 DDR3 capable for Phenom series, Athlon X2, Sempron LE,
Opteron (single-CPU servers)
Socket S1 AMD-based mobile platforms, replaces Socket 754 in the
mobile sector
PAC418 Itanium (instead of proposed Slot 3/Slot M)
PAC611 Itanium 2
Power Connectors
In addition to these sockets and slots on the motherboard, a special connector (the 20-pin
block connector shown in Figure 1.15) allows the motherboard to be connected to the
power supply to receive power. This connector is where the ATX power connector (men-
tioned in Chapter 2 in the section “Identifying Purposes and Characteristics of Power Sup-
plies”) plugs in.
Onboard Floppy and Hard Disk Connectors
Almost every computer made today uses some type of disk drive to store data and pro-
grams until they are needed. All drives need some form of connection to the motherboard
so the computer can “talk” to the disk drive. Regardless of whether the connection is
built into the motherboard (onboard)it could reside on an adapter card (off-board)—the
standard for the attachment is based on the drive’s requirements. These connections are
known as drive interfaces, and there are two main types: floppy drive interfaces and hard
disk drive interfaces. Floppy drive interfaces allow floppy disk drives (FDDs) to be con-
nected to the motherboard, and similarly, hard disk drive interfaces do the same for hard
disks and optical drives, among others. The interfaces consist of circuitry and a port, or
header. Most motherboards produced today include both the floppy disk and non-SCSI
hard disk interfaces on the motherboard. Server motherboards often include SCSI headers
and circuitry instead.
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