You are looking at the BIOS chip for the ASUS motherboard models listed in the title. Brand new BIOS chips, programmed with clean and working firmware. During the checkout, please leave a note or message me after buying with the following information: 1) Your motherboard model; 2) Required firmware version. If you require a modified or unofficial firmware version, please contact me before buying. Returns accepted with 30 days after placing the order. No returns accepted for an item that is used, damaged during installation or doesn't fix the possible problem without consulting the seller or a computer repair technician. Thanks for stopping by :)