Thank for the explanation. For ISA I am thinking if buy this motherboard with socket LGA 775 model MB 945 http://www2.ibase.com.tw/productView.aspx?id=166with IDE and FDD port... (How is real name?) and drivers windows 2000. Or buy LGA 1155 model MB970 only drivers XP http://www2.ibase.com.tw/productView.aspx?id=152#productview It has a FDD port but it don't said drivers for USB 3.0 in Windows XP. It said yes USB 3.0 for XP in model MB960 http://www2.ibase.com.tw/productView.aspx?id=164 Are drivers for windows 2000 in LGA 1155? For other computer with only IDE, my problem is searching in internet motherboard for operative system. Is this possible? (only I looking search one to one) For example: Gygabite ga-z87p said support XP but it isn't in drivers download http://es.gigabyte.com/products/page/mb/ga-z87p-d3rev_10/download/ Gygabite GA-H61M-D2H-USB3 yes, It has XP drivers http://es.gigabyte.com/products/page/mb/ga-h61m-d2h-usb3rev_10/download/ How do I perform a global search of all motherboard manufacturers with drivers for Windows 2000 / XP?