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HP Pavilion a257c Desktop PC (US/CAN) support

Motherboard Specifications, MS-6577 v 2.1 (Xenon 4)

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Motherboard specifications table

Motherboard Description
  • Manufacturer's name - MSI MS-6577 v 2.1
  • HP/Compaq name - Xenon 4
Motherboard SupplierMSI
System BIOS SupplierMSI/Award
Form FactoruATX
Processor BrandIntel
Processor Socket TypemPGA478
Processor FamilyPentium 4 and Celeron
Maximum approved processor3.06 GHz Pentium 4 HT processor
Processor Front Side Bus Frequency400/533 MHz
Chipset Name854GE
Chipset "North Bridge," Revision/Stepping845GE, B1
Chipset "South Bridge," Revision/SteppingICH4, B0
Super I/O, Revision/SteppingWinbond, W83627HF-AW
Flash BIOS Device4 MB Flash EEPROM
Memory TypeDDR
Memory SpeedPC2700/PC2100/PC1600
Memory SocketsTwo DIMMs
Maximum MemoryTwo GB
Graphics SupplierIntel
Graphics ConfigurationDown, in Chipset
Onboard Graphics MemoryUMA/up to 64MB
Graphics Connector (AGP)AGP 4x
TV-Out DeviceNo
AudioAC'97 Down
AC'97 CODEC DeviceRealtek ALC650
Rear Audio JacksMicrophone, Line-in, Line-out, Speaker-out
Front Audio JacksMicrophone, Line-in
Ethernet 10.100 LAN SupplierRealtek RT8101L
Ethernet ConfigurationPCI, Down
IDE UDMA ModesATA-66/100
Expansion SlotsOne AGP, three PCI
USB PortsTwo front, four back (ver. 2.0)
External PortsOne serial, one parallel, two IEEE 1394, PS/2 keyboard, PS/2 mouse
IEEE-1394 PortsOne front, one back
Available Manufacturer OptionsIntegrated graphics, integrated LAN, 6 speaker mode (Dolby 5.1, see note below), integrated IEEE 1394

Motherboard layout and photos

Figure 1: Layout of motherboard
Figure 2: Photo of the motherboard
1 - Mouse
2 - IEEE 1394 FireWire
3 - Parallel
4 - LAN
5 - Line-In
6 - Line-Out
7 - Microphone
8 - USB
9 - VGA
10 - Serial
11 - USB
12 - Keyboard

Clearing the CMOS settings

The Clear RTC RAM (3-pin JBAT1) jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. It also allows clearing of date, time, and system setup parameter memories in CMOS, by erasing the RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, including system setup information.
CAUTION: Do not change any jumper setting while the computer is on. Damage to the motherboard can result.
  1. Turn off the PC and unplug the power cord.
  2. Move the JBAT1 jumper cap from pins 1-2 (normal) to pins 2-3 (clear CMOS).
  3. Keep the JBAT1 jumper cap on pins 2-3 for 5 to 10 seconds, then move it back to pins 1-2.
  4. Plug in the power cord and turn on the PC.
  5. Press F1 to enter BIOS setup and change the BIOS settings.

Clearing the BIOS password

The BIOS password protects the BIOS from undesired changes. To reset or clear the BIOS password use the following steps:
  1. Turn off the PC and unplug the power cord.
  2. Remove the JPWD1 jumper cap.
  3. To enter BIOS setup, start the PC and press the F1 key as the PC starts.
  4. Clear or reset the BIOS password.
  5. Save the BIOS settings and turn off the PC.
  6. Replace the JPWD1 jumper cap.
HP Pavilion a257c Desktop PC (US CAN)

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