hello,i have a TS-879u-RP,which is early product,and my BIOS is QA61AR22, 2 ram,e3 1220 CPU. i think QV05AR72 should be used on your nas,but ,your BIOS info will be MODIFIED form 879 to 1679. i think your bios is the newest which support ivybridge CPU.
i want to update my NAS too ,but i can find...