Gigabyte GA-7VTX socket A KT266

Thursday, May 24, 2001


Just when it seems that the tide of new chipset is beginning to ebb, VIA seems to have picked-up some wind in its sails, and presented the market with its new KT266. The Gigabyte GA-7VTX, which we'll be reviewing here, is based on that very same chipset, and comes with support for DDR memory, and 133MHz FSB CPUs as a result.

Let's take a look.

Hardware characteristics of the Gigabyte GA-7VTX
AMD Athlon /Duron 200/266 MHz FSB processors
VIA KT266 VT8366/VT8233
Form factor
ATX - 30.5cm X 24.4cm
5 PCI - 0 ISA - 1 AMR - 1 AGP Pro - 4 USB
3X 184-pins DIMM SDRAM 3Gb PC1600/DDR200 - PC2100/DDR266
95Mhz to 166Mhz in 1Mhz increment in the BIOS.
Vcore adj.
Vio adj.
Audio chipset
Creative CT5880


Configuration of the GA-7VTX is a bit complex, due to the massive number of jumpers and Dips switches that have been installed by Gigabyte and many of those functions are not reproduced in the BIOS. Because of this, we'll have to take some time to go over the greater details of these switches, and their use.

First off, we have the array of Dips labeled CLK_SW, which can be used to force the FSB to one of the following frequencies: 133 - 100 - 166 - 200 - 66 - 110 - 120 - 140, or 150Mhz .

Next we have CK_RATIO, which - as you may guess - is used to set the CPUs clock multiplier value.

Other important Dips include:

  • RAM_OV: which can be used to set the memory voltage to 2.5v, 2.6v or 2.7V.
  • AGP_OV: which can be used to set the AGP port voltage to 1.5v, 1.6v ou 1.7V.

    Unfortunately, the Vcore and Vio voltages are not adjustable.

    Finally, it should be mentioned that the BIOS does not reproduce the ability to change the clock multiplier, though it does include the abilities to change the FSB in 1MHz increments, and adjust the memory bus frequency.


    Next: Technical details.