That's an easy one. I've tested about every BIOS I could find for the AN7 and one is far superior to the rest for me with dual channel 2x512 ram. That would be Enduracell & Tictac's 2t version of the AN7DE8 BIOS. I've seen it called AN7DE8CPC2t, the actual bin file is 15dE8BPLCPC.BIN. It's stable to 240x10.5 with dual channel for me. Give it a shot.