iXBT Labs - Computer Hardware in Detail






DFI NB70-SC (i845D) Mainboard

Boards from this company have never been very famous or speedy; nevertheless, this one can be a good choice for those who are looking for an inexpensive solution.


  • Package: a standard design;
  • Documentation: a user manual in 4 languages; a poster with brief description of functional connectors and switches;
  • Cables: 1 ATA66/100 and 1 FDD;
  • 2 CDs including:
    • drivers;
    • PDF description;
    • Adobe Acrobat Reader;
    • system monitoring utilities;
    • Trend Micro PC-Cillin 2000.

The layout is not the best: the FDD connector is behind the PCI slots, and it can be difficult to reach if full-size expansion slots are installed in these slots; the power connector is behind the memory slots and this will hamper operation of the memory; CD-in connectors are in front of the PCI slots. It's not difficult to reach switches and jumpers, but their functions are not shown on the textolite. The board uses three power connectors complying with the ATX 2.03 standard (including the rare Auxiliary Power).

The 3-channel switching voltage regulator incorporates 14 capacitors of 2200 uF.

The following controllers are integrated: an audio one based on the chipset's capabilities and Avance Logic codec (ALC201A).

Although we have a production sample, there are several switches meant only for the manufacturer which leaves the impression that the board is not finished, especially taking into account the results.

Non-unsoldered connectors: none.

The system monitoring is supported by the Winbond W83627HF-AW chip. Processor and battery voltage (+/-3.3, +/-5 and +/-12 V), speed of 3 fans and temperatures of the processor (a built-in sensor) and the board (a built-in sensor) can be controlled. There are 3 connectors for adjustable connection of fans.

Brief characteristics of the board: memory slots - 2 DDR SDRAM; expansion slots - AGP/ 5 PCI/ CNR; I/O ports - 2 COM/ LPT/ 2 PS/2/ 4 USB 1.1; dimensions - 305x245 mm.

Adjustment can be carried out with:

jumpers and switches Jumper to clear up the CMOS
Jumper to make possible to start up a computer with a keyboard/mouse
Jumpers to change a CPU frequency 100/133 MHz
Jumper to choose the fourth USB port from special connectors or a CNR card
BIOS based on v6.00PG from Award Setup of memory timings + CAS Latency, Active to precharge delay
Setup of memory frequency + Auto/DDR200/DDR266
Setup of AGP bus +
Setup of PCI bus -
Changeable scaler of AGP and PCI buses -
Manual assignment of interrupts +
Changeable FSB frequency + in 1 MHz steps, 100-132 MHz at FSB 100 MHz, 133-166 MHz at FSB 133 MHz
Changeable CPU multiplier + x8-x50
Changeable core voltage -
Changeable memory voltage -
Changeable chipset voltage -
Changeable AGP bus voltage -

We used the latest available version of the BIOS of 20/11/2001.

The board falls considerably behind its competitors in some applications, it may require a newer BIOS version to improve it. And now the board can be taken due to its low price.

Test results:

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