775? Is that a Prescott CPU... Whoa, taking us all back now

I tried to open F6F.... Its empty

You need to contact Fujitsu as this is an OEM product.
Can speak to any of the boards features. No documentation on the Gigabyte website I could find.
I only saw SiS 648FX, then 661. SiS made a 649 chipset, but its no where on Gigabytes UK website... maybe buried elsewhere?