iXBT Labs - Computer Hardware in Detail






ZIDA A845DD (i845D) Mainboard

ZIDA products have always been popular because of a cheap price, but quality is not the great.


  • Package of a standard design;
  • Documentation: a brief user manual in English;
  • Cables: 1 ATA66/100 and 1 FDD;
  • CD including:
    • drivers;
    • Norton Antivirus 2001.

The layout is not very convenient: an FDD connector is behind PCI slots (that is why it might be difficult to handle it and cards in these slots), the CD-in is between the PCI slots, and a Wake-on-LAN is in front of them. It's not difficult to reach switches and jumpers, but their functions are not shown on the textolite.

The 3-channel switching voltage regulator incorporates 11 capacitors of 1100 uF and 3 of 3300 uF.

The following controllers are integrated: an audio one based on the chipset's capabilities and Crystal 4299-XQ codec.

Non-unsoldered connectors: an RJ45 connector and a chip which realizes network capabilities of the chipset.

The system monitoring is supported by the Winbond W83627HF-AW chip. Processor and battery voltage (+/-3.3, +/-5 and +/-12 V), speed of 2 fans and temperatures of the processor (a built-in sensor) and the board (a built-in sensor) can be controlled. There are 2 connectors for adjustable connection of fans.

Brief characteristics of the board: memory slots - 2 DDR SDRAM; expansion slots - AGP/ 6 PCI/ CNR; I/O ports - 2 COM/ LPT/ 2 PS/2/ 4 USB 1.1; dimensions - 305x220 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 PS/2 keyboard/mouse
Jumper to choose a way the sound is applied to the audio codec / standard speaker
BIOS based on v6.00PG from Award Setup of memory timings + CAS Latency, Active to Precharge delay, RAS to CAS delay, RAS precharge
Setup of memory frequency + PC100/PC133 (as shown in the BIOS, but it fact it is DDR200/DDR266)
Setup of AGP bus +
Setup of PCI bus -
Changeable scaler of AGP and PCI buses -
Manual assignment of interrupts -
Changeable FSB frequency + 100, 103, 105, 107, 109, 111, 114, 117, 120, 127 and 130 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 - 1.01.

Not a high speed of the board's operation is compensated by a low price. The board is a good choice for low-budget systems.

Test results:

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