New Bios Chip for ASROCK Z170 Pro4, Z170 Pro4S, Z170A-X1/3.1, Z170A-X1,  tested and verified!  The latest version of bios! After your purchase, please just e-mail me the right model number of your motherboard! New! Verified! No password! Guaranty! If you need a bios chip for any other laptop, please send me a query because I have new bios chips for about 95% of the laptop at the lowest prices. Just because of the large amount of that i do not get it all list on Ebay. Thank you in advance. From now on, from 15 April 2018, we send all shipments worldwide with Priority Express shipping!