My Asus Z97-Pro (WiFi ac) have bios v2303: So I load the new bios (all the more recent bioses anyway) on USA flash: I picked up the latest one (v2702) and tried... ...to upload it, then I get "not a proper BIOS" message: NONE of the bioses I tested (v2401, v2501, v2601 and v2702) worked. All I download directly from Asus site: Z97-PRO(Wi-Fi ac) - Podpora ...so could SOMEBODY tell me, what is going on?! Next thing - let's try the mainboard function of USB BIOS Flashback - I put into the proper port (page 2-14 "bottom port supports USB BIOS Flashback") USB drive with file in the root directory, renamed by the BRenamerl.exe utility to "Z97P.CAP") After power up, I hold the BIOS_FLBK button for 3+ seconds and I expected to see 3 blinks of the LED and beggining of the flash proces, but ABSOLUTELY NOTHING HAPPEND. The last attempt to flash bios update on Asus Z97-Pro (WiFi ac) was my attempt to boot from USB flash. Formated as DOS bootable device (or DrDOS) and in both attempts failed. Even afer disconnecting both SATA devices (HDD + DVD). So the mainboard works, but it did not see the Samsung SM951 (MZ - HPV1280) M.2 128G SSD is not seen as device in bios or HDD prep programs like Mini Tool Partition Wizard Pro. Any help is need: ...perhaps it is just me, doing something wrong?