Review Index:

Gigabyte 7ZXR (2.2) KT133A Motherboard Review

Subject: Motherboards
Manufacturer: Gigabyte


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In the test lab, we have reviewed lots of motherboards, Gigabyte included. This is our first review of their product in some time and in this form, the GA-7ZXR (2.2), we are looking at a KT133A chipset motherboard with support for 266 MHz FSB processors.

Unlike most motherboards, the revision number on the 7ZXR is very important. Not merely some minor design changes took place between 1.0 and 2.2; in fact, they changed entire chipsets. The first 7ZXR motherboard used the original 686A south bridge chipset. So, instead of creating an entirely new motherboard and model of motherboard, and selling both, Gigabyte chose to have only one KT133A chipset motherboard with the 686B south bridge. Not a bad idea with the costs being merely the same and having the advantages of revision 2.2 being available to everyone.

Motherboard Specifications

CPU Socket

Socket A (133/266 DDR MHz Support)




Form Factor


Multiplier Options

5.5 - 12.5x

Bus Speed Options

95-120 MHz and 133-150 MHz


1.5 - 1.85v in .025v increments

Memory Support

3 x 168-pin SDRAM PC100/PC133 Support

Expansion Slots

6/0/1/1 (PCI/ISA/AMR/AGP)

AGP Support

4x AGP

USB Support

2x Standard USB ports

2x Expansion

Integrated Components

Creative CT5880 Audio


AMI Bios

Onboard IDE

2 x ATA100 EIDE


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