iXBT Labs - Computer Hardware in Detail






ABIT SR7-8X (SiS648) Mainboard

This board doesn't stand out here, and it's oriented towards the mid-level segment doomed by the budget SiS's chipset. 


  • Package of a standard design; 
  • Documentation: user manual in English; 
  • Cables: ATA66/100/133 and FDD; 
  • Bracket for the rear computer panel; 
  • CD containing: 
    • drivers; 
    • DirectX 8.1; 
    • Norton Antivirus 2002; 
    • WinDVD 2000 v.2.1; 
    • 3Deep; 
    • BuzzSoft SoftPostCard; 
    • BuzzSoft SoftCopier; 
    • BuzzSoft SoftCardManager; 
    • BuzzSoft SoftBulkEmail. 

The layout is not without the downsides: the audio-ins are in front of the PCI slots, the FDD is behind them, and the power supply connector is right in the center, that will certainly worsen air circulation. But it's not difficult to reach the only jumper when the board is already installed. Its function is shown on the textolite.

The 2-channel switching voltage regulator incorporates 7 capacitors of 2200 uF and 3 of 1500uF. 

The following controllers are integrated: 

  • audio controller based on the chipset's capabilities and Avance Logic ALC201A supporting 4.1 audio systems; 
  • network controller based on the Realtek RTL8100B supporting 10BaseT/100BaseTX. 
+5V supplied in the StandBy mode is indicated by the red LED. 

Non-unsoldered connectors: none. 

The system monitoring is supported by the Winbond W83697HF chip. What is controlled: 

  • voltage of processor, +3.3, +-5 and +-12 V, VBAT; 
  • speed of 2 fans; 
  • temperatures of the processor (a built-in sensor), and the board (a built-in sensor).
There are 2 connectors for adjustable and 1 for unadjustable connection of fans. 

Brief characteristics of the board: memory slots - 3 DDR SDRAM; expansion slots - AGP/ 5 PCI; I/O ports - 2 COM/ LPT/ 2 PS/2/ 6 USB 2.0; dimensions - 305x245 mm.

Adjustment can be carried out with:

jumpers and switchesJumper to clear up the CMOS 
BIOS based on v.3.31a from AMISetup of memory timings+CAS Latency, Timing Setting Mode, RAS Precharge Time, RAS To CAS Delay, Write Recovery Time, Timing Constraint Control, MA Delay 1T/2T Select
Setup of memory frequency+CPU:DRAM = 1:1, 3:4, 3:5, 1:2, 4:3, 4:5, 2:3, Auto
Setup of AGP bus- 
Setup of PCI bus+ 
Changeable scaler of AGP and PCI buses+AGP(PCIx2) = 66-100 MHz in 1MHz steps
Manual assignment of interrupts+ 
Changeable FSB frequency+100-200 MHz in 1MHz steps
Changeable CPU multiplier+x8-x24
Changeable core voltage+Default, +5%, +10%, +15%
Changeable memory voltage+Default, 2.6, 2.7 and 2.8 V
Changeable chipset voltage- 
Changeable AGP bus voltage- 

We used the latest available version of the BIOS - BA. 

The board is a good performer, but it lacks either a noteworthy set of controllers or fascinating accessories. It fits the bill if cheap and overclockable is what you need. 

Test results: 


Dmitry Mayorov (destrax@ixbt.com

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