Guys i have an alienware 15 r2 with 240W PSU original bios A00 uses all the power from PSU(which is sufficient enough) to drive the GPU and CPU, but after updating to the recent bios 1.3.12 I am experiencing Lag in game caused by Hybrid power system ( which uses power from PSU and Battery). So can i downgrade directly from 1.3.12 to A00 bios or are there any precautions or other steps?