iXBT Labs - Computer Hardware in Detail






Iwill P4GB (Intel E7205) Based Mainboard

The functions are good though not outstanding; its has nonstandard power supply connectors (meant for power supply units used in server systems - however, power supply connectors from standard units can be easily used as well) and connectors on the back. Unfortunately, we haven't found a printed manual, and the CD gives only a link to the site, but there is no any manual as well. 


  • Package of a new austere design; 
  • Cables: 1 ATA66/100/133 and FDD; 
  • Bracket with 2 USB ports; 
  • Bracket for the rear computer panel;
  • CD containing: 
    • drivers; 
    • several system monitoring utilities; 
    • Adobe Acrobat Reader; 
    • McAfee VirusScan. 

The layout is nonstandard; the audio-ins are not in very good positions, as well as connectors of the serial port, IEEE 1394, IDE and FDD. It can be difficult to reach some jumpers when the board is already installed. Their functions are shown on the textolite. 

The 3-channel switching voltage regulator incorporates 9 capacitors of  3300 uF and 4 of 2200 uF. 

The following controllers are integrated: 

  • audio controller based on the Analog Devices AD1981A AC'97 codec supporting 5.1 audio systems; 
  • network controller based on the Intel RC82540EM chip supporting 10BaseT/100BaseTX/1000BaseT (Gigabit Ethernet); 
  • IEEE 1394 bus controller based on the Texas Instruments TSB43AB22 bus. 

+5 V supplied in the StandBy mode is indicated with the LED onboard. 

Non-unsoldered connectors: none.

The system monitoring is supported by the Winbond W83627HF-AW chip. What is controlled: 

  • processor voltage, 1.3, +3.3, +5 and +-12 V, VBAT and +5 V Standby
  • speed of 3 fans; 
  • temperatures of the processor (a built-in sensor) and the board (a built-in sensor). 

There are 2 connectors for adjustable and 2 for unadjustable connection of fans. 

Brief characteristics of the board: memory slots - 4 DDR SDRAM; expansion slots - AGP Pro/ 5 PCI; I/O ports - 2 COM/ LPT/ 2 PS/2/ 6 USB 2.0 / 2 IEEE1394; dimensions - 305x245 mm. 

Adjustment can be carried out with:

jumpers and switches Jumper to clear up the CMOS  
Jumper to enable/disable the network controller  
Jumper to enable/disable the IEEE 1394 bus controller  
Jumper to protect Flash EEPROM from writing (?)  
BIOS based on the 6.00PG Award WorkstationBIOS from Phoenix Setup of memory timings + CAS Latency, Active To Precharge Delay, RAS to CAS Delay, RAS Precharge
Setup of memory frequency -  
Setup of AGP bus -  
Setup of PCI bus -  
Changeable scaler of AGP and PCI buses -  
Manual assignment of interrupts +  
Changeable FSB frequency + 100-165 MHz in 1MHz steps
Changeable CPU multiplier + x8-x32
Changeable core voltage + 1.1-1.85 V in 0.025V steps
Changeable memory voltage -  
Changeable chipset voltage -  
Changeable AGP bus voltage -  

We used the BIOS of 12.11.2002 as the latest available version. 

The board is for those who want to build a reliable high-performance computer which doesn't need functions above standard and overclocking. 


Dmitry Mayorov (destrax@ixbt.com

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