iXBT Labs - Computer Hardware in Detail






Biostar P4TDG (i845G) Mainboard

Mainboards of this company get into our lab quite seldom, that is why let me give you some information on it: the company was founded in 1986, in 1990 it was among the first who opened a plant in the continental China, its products have the ISO9001 international quality certificate. Biostar deals  with mainboards, barebone systems, webpads, Internet consoles etc. The range of mainboards is not very wide, they are developed mostly for the mid and low-price market segments. 


  • Package of a standard design; 
  • Documentation: brief user manual in English and Spanish; 
  • Cables: 1 ATA66/100/133 and FDD; 
  • Bracket with 2 USB and 1 Game ports; 
  • Bracket with a serial port; 
  • Bracket for the rear computer panel; 
  • 2 CDs containing:
    • drivers; 
    • user manuals for different Biostar's mainboards; 
    • system monitoring utility; 
    • Adobe Acrobat Reader; 
    • Adobe Acrobat eBook Reader; 
    • Norton Antivirus 2002; 
    • Norton Personal Firewall 2002; 
    • Norton Ghost; 
    • DirectX 8. 

The layout is typical of the mATX format: all connectors are too close to each other, and you can just dream about convenient handling. However, in return you get a small board. It can be difficult to reach some jumpers when the board is already installed. Their functions are shown on the textolite. 

The 2-channel switching voltage regulator incorporates 8 capacitors of 2200 uF and 4 of 1200 uF. 

The following controllers are integrated: 

  • audio controller based on the C-Media CMI9738 AC'97 codec supporting 4.1 audio systems and with a connector for front audio- ins; 
  • network controller based on the Realtek RTL8100B chip and supporting 10BaseT/100BaseTX. 
The board comes with a special strengthening plate on the back of the PCB for installation of massive coolers. 

Non-unsoldered connectors: flash card reader interface controller and its connectors and some audio connectors. 

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

  • voltage of processor, AGP bus, +3.3, +5 and +/-12 V, VBAT and +5 V Standby; 
  • speed of 2 fans; 
  • temperature of the processor (a built-in sensor). 
There are 2 connectors for adjustable connection of fans. 

Brief characteristics of the board: memory slots - 2 DDR SDRAM; expansion slots - AGP/ 3 PCI /CNR; I/O ports - 2 COM/ LPT/ 2 PS/2/ 4 USB 2.0 (the chipset supports up to 6 such ports); dimensions - 245x245 mm. 

Adjustment can be carried out with:

jumpers and switches Jumper to clear up the CMOS  
Jumper for starting up computer from PS/2 keyboard  
Jumpers for starting up computer from USB keyboard  
Jumpers for setting memory voltage 2.5, 2.6, 2.75, 2.8 and 2.9 V
BIOS based on the AwardBIOS 6.00PG version from Phoenix Setup of memory timings + CAS Latency, Active To Precharge Delay, RAS to CAS Delay, RAS Precharge
Setup of memory frequency + Auto, DDR200, DDR266, DDR333
Setup of AGP bus +  
Setup of PCI bus -  
Changeable scaler of AGP and PCI buses -  
Manual assignment of interrupts -  
Changeable FSB frequency + 100-160 MHz in 1MHz steps
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 - BIOS 0522b. 

The board has no distinguishing features, but at the same time its quality is quite high, it suits well an ordinary office or home system. 


Dmitry Mayorov (destrax@ixbt.com)
Sergei Pikalov (peek@ixbt.com)

Write a comment below. No registration needed!

Article navigation:

blog comments powered by Disqus

  Most Popular Reviews More    RSS  

AMD Phenom II X4 955, Phenom II X4 960T, Phenom II X6 1075T, and Intel Pentium G2120, Core i3-3220, Core i5-3330 Processors

Comparing old, cheap solutions from AMD with new, budget offerings from Intel.
February 1, 2013 · Processor Roundups

Inno3D GeForce GTX 670 iChill, Inno3D GeForce GTX 660 Ti Graphics Cards

A couple of mid-range adapters with original cooling systems.
January 30, 2013 · Video cards: NVIDIA GPUs

Creative Sound Blaster X-Fi Surround 5.1

An external X-Fi solution in tests.
September 9, 2008 · Sound Cards

AMD FX-8350 Processor

The first worthwhile Piledriver CPU.
September 11, 2012 · Processors: AMD

Consumed Power, Energy Consumption: Ivy Bridge vs. Sandy Bridge

Trying out the new method.
September 18, 2012 · Processors: Intel
  Latest Reviews More    RSS  

i3DSpeed, September 2013

Retested all graphics cards with the new drivers.
Oct 18, 2013 · 3Digests

i3DSpeed, August 2013

Added new benchmarks: BioShock Infinite and Metro: Last Light.
Sep 06, 2013 · 3Digests

i3DSpeed, July 2013

Added the test results of NVIDIA GeForce GTX 760 and AMD Radeon HD 7730.
Aug 05, 2013 · 3Digests

Gainward GeForce GTX 650 Ti BOOST 2GB Golden Sample Graphics Card

An excellent hybrid of GeForce GTX 650 Ti and GeForce GTX 660.
Jun 24, 2013 · Video cards: NVIDIA GPUs

i3DSpeed, May 2013

Added the test results of NVIDIA GeForce GTX 770/780.
Jun 03, 2013 · 3Digests
  Latest News More    RSS  

Platform  ·  Video  ·  Multimedia  ·  Mobile  ·  Other  ||  About us & Privacy policy  ·  Twitter  ·  Facebook

Copyright © Byrds Research & Publishing, Ltd., 1997–2011. All rights reserved.