Here are Hynix BFR, this run 1251MHz 9-12-10-25-1T 1.74 V, but only with BIOS P1.60,0
at PSC and BBSE P1.15G I must have so that I can boot 1300MHz, it just a BIOS type, where all chips run equally well.
http://www.kingpic.net/th/hynix_bfr_1251mhz.jpg