Gigabyte MB ???

I am trying to figure out what the specs are on a certain motherboard. I think its a gigabyte motherboard. I am doing a quote to possibly upgrade this system for someone, and I need to know how fast a processor i can stick in it. Its a Socket 7, 2 DIMMs, 2 72pSIMMS, 3 ISA, SiS 5582 chipset, and the motherboard has the following printed on it: GA-586S7. I checked Giga-byte's website but was unable to figure out which motherboard this was. If someone can either point me to a page with the specs for this board or can let me know what the fastest processor I can put in there is I would appreciate it. Thanks.