Lenovo Z50-70 NM-A273 rev 1.0 working bios 8MB https://fixbios.com//index.php?threads/lenovo-z50-70-bios.12769/
Lenovo Z50-70 ACLUA/ACLUB NM-A273 Rev 1.0 2013-12-27 BIOS:25B64BSIG KBC: IT8586E FXA CPU: SR1EN GPU: N15S-GT-S-A2 Vesion BIOS 9BCN31WW. Tested, works 100%