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HP and Compaq Desktop PCs - Motherboard Specifications, M2N78-LA (Violet)
Figure 1: The M2N78-LA (Violet) motherboard
Front-side bus speed
Processor upgrade information
Socket type: AM2
Motherboard supports the following processor upgrades:
Memory upgrade information
Integrated graphics using nVidia GeForce 9100
*Integrated video is not available if a graphics card is installed.
Integrated Realtek ALC888S Audio
*Integrated audio is not available if a sound card is installed.
Back I/O ports
Figure 2: Back I/O pane
1 - PS/2 mouse (green)
2 - S/PDIF coaxial out
3 - Video Graphics Adapter
4 - IEEE 1394
5 - RJ-45 Network (LAN)
6 - Audio: Center/Subwoofer (yellow orange)
7 - Audio: Rear Speaker Out (black)
8 - Audio: Line In (light blue)
9 - Audio: Line Out (lime)
10 - Audio: Microphone (pink)
11 - Audio: Side Speaker Out (gray)
12 - USB 2.0: 4
13 - DVI
14 - PS/2 keyboard (purple)
Figure 3: layout
Clearing the CMOS settings
CAUTION: Do not change any jumper setting while the computer is on. Damage to the motherboard can result.
This motherboard has a jumper to clear the Real Time Clock (RTC) RAM in CMOS.
To clear CMOS, follow these steps:
Clearing the BIOS password
The BIOS password is used to protect BIOS settings from unwanted changes. If you have forgotten your password you may disable password checking.
To erase the BIOS password follow these steps: