Gigabyte GA-8S655FX Ultra

..:: Introduction ::..

Only a few weeks ago we took an initial look at the SiS655FX chipset and were quite pleased with what we saw. The SiS655FX chipset offered several new features, mainly dealing with that of the available memory configurations that the i875P and i865PE chipsets do not. Not only can you use different sizes and types of RAM with the 655FX chipset, but you can also retain some form of dual channel operation while doing so, something that is currently impossible with the i875P or i865PE chipsets offered by Intel. The performance of the reference 655FX motherboard held up quite well with that of the Intel D875PBZ, and today we’ll be taking a look at our first retail model featuring the 655FX chipset, the Gigabyte GA-8S655FX Ultra. This board packs on all of those features you’d expect to see on a Gigabyte motherboard, but how well does it hold up for performance? How well does the board overclock? Let’s take a look and see just what we can find out about the Gigabyte GA-8S655FX Ultra.

..:: GA-8S655FX Ultra Specifications ::..


  • Socket 478 for Intel® Pentium® 4 with HT Technology


  • Northbridge – SiS655FX HMAC Host & Memory & AGP Controller
  • Southbridge – SiS964 MuTIOL® Media I/O
  • Realtek Gigabit LAN Ethernet Controller
  • Realtek ALC658 Audio CODEC
  • ITE GigaRAID Controller Chip
  • Texas Instrument IEEE1394 Chip
  • Super I/O: ITE I/O IT8712F Chip
  • 2 x 2M bit flash ROM


  • Type: Dual Channel DDR 400 / 333 / 266
  • 4 x DIMM
  • Max Capacity: Up to 4GB

Internal I/O Connector

  • 1 x FDD
  • 2 x Serial ATA
  • 4 x UDMA ATA 133/100/66 Bus Master IDE
  • 2 x IEEE 1394
  • 2 x USB 2.0 (4 ports by cable with rear USB bracket)
  • S/P DIF Input / Output w/rear bracket
  • 3 x Cooling fan pin headers
  • CD/AUX in

Expansion Slots

  • 1 x AGP 8x/4x AGP 3.0 Compliant
  • 5 x PCI (PCI 2.3 Compliant)

Rear Panel

  • PS/2 Keyboard / Mouse Connector
  • 4 x USB 2.0 ports
  • 2 x COM ports
  • 1 x RJ45 LAN port
  • 1 x LPT port
  • Audio (1 x Line-in / 1 x Line-out / 1 x Mic) Connector