iXBT Labs - Computer Hardware in Detail






ASUS P4S333 (SiS 645) Mainboard

This giant was first to release a mainboard on this chipset.


  • Package: a new design for this company;
  • Documentation: a user manual in English; a short installation manual - in 11 languages;
  • Cables: 1 ATA66/100 and 1 FDD;
  • Bracket with a serial port for the rear panel;
  • Bracket with two USB ports for the rear panel;
  • Sticker showing functional connectors and switches;
  • Sticker with the company's logo for the front panel;
  • CD with software including:
    • drivers;
    • Adobe Acrobat Reader;
    • ASUS Update;
    • PowerPlayer SE;
    • PowerDVD;
    • VideoLive Mail;
    • ASUS Hotkey;
    • Intel LDCM (LANDesk Client Manager);
    • PC-Cillin 2000;
    • ASUS PCProbe;
    • screensaver from ASUS.

The layout is simple and convenient: for example, IDE and FDD connectors are placed in front of the memory slots. There are two connectors for +12V for old power supply units which do not comply with the ATX 2.03 specification. There is also a traditional ASUS iPanel connector.

The feed circuits incorporate 6 capacitors of 3300 uF and 3 of 1200 uF.

There are the following controllers: C-Media CMI8738/PCI-6ch-MX supporting 6-piece acoustic systems and having a connector for front audio-outs and SPDIF; ITE I/O IT8707F controller supporting MultiMedia Card and Secure Digital Card Reader (the reader connectors are unsoldered); and a proprietary temperature and fan rotation monitoring chip.

Non-unsoldered connectors: network controller (based on functionality of the SiS961 south bridge).

Brief characteristics of the board: memory slots - 3 DDR SDRAM; expansion slots - AGP/ 6 PCI/ ACR; I/O ports - 2 COM/ LPT/ 2 PS/2/ 6 USB; dimensions - 305x220 mm.

Adjustment can be carried out with:

jumpers and switches Jumper to clear up CMOS
Jumper to choose an operating mode Jumper/JumperFree
Jumper to setup memory voltage 2.5, 2.7, 2.9 V
Jumper to lift processor voltage by 0.2 V
Jumper to make possible to start up a computer with a keyboard
Jumper to make possible to start up a computer with a mouse/keyboard with a USB connector
Jumper to choose an audio channel mode (Center/Bass)
Switches for FSB, memory and PCI bus frequencies
BIOS based on v6.00 from Award Setup of memory timings + CAS Latency, RAS to CAS Delay, RAS Precharge Time, SDRAM Mode
Setup of memory frequency + DDR200, DDR266, DDR333
Setup of AGP bus +
Setup of PCI bus +
Changeable scaler of AGP and PCI buses + FSB 100 MHz - 1:1, 3:4, 3:5. FSB 133 MHz - 4:3, 1:1, 4:5
Manual assignment of interrupts +
Changeable FSB frequency + In 1 MHz increments
Changeable CPU multiplier + x8 - x50
Changeable core voltage + 1.5 - 1.85 V, 0.025 V step
Changeable memory voltage -
Changeable chipset voltage -
Changeable AGP bus voltage -

The board is one of the speediest models today, rather reliable and rich in functions.

Test results:

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