1. System Unit of a Computer System
主機板 (Motherboard)

2. AT motherboard
INTERFACE
SLOT
BIOS
CPU
KEYBOARD
CPU
CACHE
RAM
POWER

3. ATX motherboard

4. Important specification
Hard disk
Power connector
PCI slot
BIOS
AGP slot
Main Memory
IDE slot
I/O port
Floppy Drive
Battery
USB port
PS/2 slot
Chipset

9. PCI PCI PCI-X PCI Express (3GIO) Connection type Parallel Serial
Highest bandwidth
528MB/s
4.3GB/s
12.8GB/s

10. AGP

11. Buses in a computer Bus Type Bus Width Bus Speed MB/sec ISA 16 bits
8 MHz
16 MBps
EISA
32 bits
32 MBps
VL-bus
25 MHz
100 MBps
33 MHz
132 MBps
PCI
64 bits
264 MBps
66 MHz
512 MBps
133 MHz
1 GBps

12. IDE slot Pin Description 1 23 2 24 3 25 4 26 5 27 6 28 7 29 8 30 9 31
Reset 23
-IOW 2
Ground 24 3
Data Bit 7 25
-IOR 4
Data Bit 8 26 5
Data Bit 6 27
I/O Channel Ready 6
Data Bit 9 28
SPSYNC: Cable Select 7
Data Bit 5 29
-DACK 3 8
Data Bit 10 30 9
Data Bit 4 31
RQ 14 10
Data Bit 11 32
-IOCS 16 11
Data Bit 3 33
Address Bit 1 12
Data Bit 12 34
-PDIAG 13
Data Bit 2 35
Address Bit 0 14
Data Bit 13 36
Address Bit 2 15
Data Bit 1 37
-CS1FX 16
Data Bit 14 38
-CS3FX 17
Data Bit 0 39
-DA/SP 18
Data Bit 15 40 19 41
+5 Volts (Logic) (Optional) 20
Cable Key (pin missing) 42
+5 Volts (Motor) (Optional) 21
DRQ 3 43
Ground (Optional) 22 44
-Type (Optional)

13. IDE signal cable

14. SCSI

15. External SCSI
SCSI 68PIN
SCSI 50PIN

17. COM port

18. LPT port

19. USB port
power A
signal
earth B

20. i845GV

21. i845GE

22. i845PE

23. AMD750 200 MHz AMD-K7 Host Channel UDMA/66 AGP 2x 4 port OHCI USB
AMD-751™ System Controller
AMD-756™ Peripheral Bus Controller
200 MHz AMD-K7 Host Channel
UDMA/66
AGP 2x 4 port OHCI USB
ACPI 1.0 compliant
PC100 SDRAM (up to 768 MB)
APM 1.2 compliant
PCI 2.2 compliant
PCI-ISA bridge
ECC support
Plug & Play support
Support for 6 PCI masters
IOAPIC support
492 pin PBGA
Advanced Power Management
Keyboard/Mouse controller
Y2K compliant RTC
Host SMBus
272 pin PBGA
AMD750

24. AMD760

25. AMD 760MP
Dual point-to-point, high-speed 266MHz 1 AMD Athlon system bus (supporting up to two processors)
PC21002 DDR (Double Data Rate) memory subsystem (supporting up to 4 GB of memory space)
AGP-4X Graphics Interface (supports 1X and 2X modes)
PCI 2.2 Compliant 33 MHz - 32/64-bit PCI Bus Interface
Two-channel EIDE Interface supporting ATA 33/66/100 modes
LPC bus
Flash memory/GPIO Interface
USB OHCI host controller supporting four ports
SM-Bus
IOAPIC support
Serial IRQ support
Power management support

26. AMD760MPX
Dual high-speed 266 MHz1 AMD Athlon system buses, supporting up to two processors
PC21002 DDR memory subsystem supporting up to 4 GB of memory
AGP-4X Graphics Interface (supports 1X and 2X modes
Primary PCI 2.2 compliant 66-MHz/64-bit/32-bit PCI Bus
Secondary PCI 2.2 compliant 33-MHz/32-bit PCI Bus
Two-channel ATA 33/66/100 support
LPC bus
Thirty-two general-purpose IO (GPIO) pins
USB OHCI host controller supporting four ports
SM-Bus
IOAPIC support
Serial IRQ support
Power Management support
AC ‘97 Audio support

27. Socket 370主機板 Intel 82815EP (B-stepping) / 82801BA 晶片組
支援 Intel Celeron FC-PGA with 66/100 Mhz FSB
支援 Intel Pentium III FC-PGA with 100/133 Mhz FSB
支援 Intel Pentium III FC-PGA 2 with 133Mhz FSB (Tualatin Ready)
支援 VIA Cyrix III with 100/133 Mhz FSB
支援三支 SDRAM , 最高可達 512MB, PC100/PC133 SDR DIMM
支援 6 PCI, 1 AGP 4X
內建 C-Media 8738/PCI-6ch 晶片, 支援 2/4/6 聲道喇叭輸出
內建 Promise 265R, 支援ATA 100 IDE RAID ( AE25R Only )

28. Socket 423主機板 Intel 850/82801BA 晶片組
Socket423 規格, 支援Intel Pentium 4 CPU
支援四支 RIMMs 2GB, 最高可達 PC800 RDRAM
支援 AGP 4X, CNR, USB ports
支援 UDMA ATA 100/66/33 IDE 介面
內建 AC'97 音效輸出
內建硬體溫度/電壓監控功能

29. Socket 478主機板 (Intel) Intel 845MCH / 82810 ICH2 晶片組
Socket478 規格, 支援 Intel Pentium 4 CPU
184根針腳的 DDR X 2, 最高可達 2GB DDR PC1600/PC2100 DIMM
支援 AGP 4x Slot / 4 USB1.1 Ports
支援 5 PCI 2.1/2.2 Slot
支援 UDMA ATA 100/66/33 IDE 介面
內建 C-Media 8738/PCI-6ch 晶片, 支援 2/4/6 聲道喇叭輸出
內建 Promise 265R, 支援 ATA 100 IDE RAID (AB40R Only)
內建 USB2.0 介面 (選購品)

30. Socket 478主機板 (VIA) VIA P4X266A/VT8233A 晶片組
Socket 478 規格, 支援 Intel Pentium 4 CPU
184 根針腳的 DDR X 3 最高可達 3GB DDR PC1600/PC2100 DIMM
支援 AGP 4X, and 4 USB ports (1.1)
支援 UDMA ATA 133/100/66 IDE 介面
內建 High Point 372 支援 ATA-133 IDE RAID (AV45GT2R only)
內建 C-Media 8738/PCI-6ch 晶片,支援 2/4/6 聲道喇叭輸出
內建 VT6202 USB 2.0 介面 (選購品)

31. Socket 478主機板 (SIS) SIS 650/SIS 961 晶片組 支援 Socket 478 Intel Processors
支援2隻DDR DIMM 最高可達2GB PC1600/PC2100 DDR DIMM
支援 AGP 4X, and 6 USB (1.1)插槽
內建 Realtek /100 網路晶片
支援 UDMA ATA 100/66/33 IDE 介面
內建 AC'97 音效輸出

32. Socket A 主機板 VIA VT8366A/VT8233 晶片組
AMD K7 規格, 支援 Athlon/Duron FSB 200/266 Processors
184 根針腳的 DDR X 4 最高可達 4GB DDR PC1600/PC2100 DIMM
支援 AGP 4X, 6 USB ports (1.1)
支援 UDMA ATA 100/66/33 IDE 介面
內建 High Point 372, 支援 ATA-133 IDE RAID (AK35GTR only)
內建 C-Media 8738/PCI-6ch 晶片, 支援 2/4/6 聲道喇叭輸出
內建硬體溫度/電壓監控功能