Power pins and storage device pins on mainboard

This post is lesson 22 of 42 in the subject Computer Hardware

1. Power pins on mainboard

Power pins are responsible for providing voltage to the mainboard. There are many types of power pins: main power pins, CPU power pins, and fan power pins.

Main power pins on mainboard
Main power pins
CPU power pins on mainboard
CPU power pins
Fan power pins on mainboard
Fan power pins

2. Storage device power pins on mainboard

There are many standards for connecting storage devices:

  • FDD (Floppy Disk Drive)
  • IDE (Integrated Drive Electronics)
  • SATA (Serial Advanced Technology Attachment)
  • SCSI (Small Computer System Interface)

2.1. FDD

FDD is a 35-pin floppy drive connector standard, rarely used now.

FDD pins

2.2. IDE

IDE is connector standard for ATA storage devices. Connectors on an IDE cable have 40 pins.

IDE pins on mainboard

2.3. SATA

SATA is also a storage device connector standard, but has a higher data transfer rate than IDE.

SATA pins on mainboard

SATA has data transfer rates of 150MB/s (SATA 1.0), 300MB/s (SATA 2.0) and 600MB/s (SATA 3.0).

2.4. SCSI

SCSI is a high-end standard for servers, with 50 or 68 pins. It has high data transfer rate about 320MB/s, 640MB/s.

SCSI pins
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Posted by Vinh Le

Composer at ITLearningCorner.

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