Request Unlock Acer Travelmate P243 Insyde BIOS EFI Utility

hi guys..i would like to make a request to unlock EFI Utility in my Insyde BIOS v1.05 Rev.3.7.. i have an Acer Travelmate P243 laptop, with Acer BA40_HC MoBo running Intel chipsets, Core i3-3110M CPU and 2 x 2GB RAM Sticks [1 is Kingston DDR3 PC3-10600(667MHz) and Elpida DDR3 PC3-12800(800MHz)]..i just want my RAM to run at its original speed(800MHz).this laptop when i bought it only came with 2GB Elpida RAM,i added extra RAM but the system uses the slower RAM speed(667MHz)..any ideas??
hope to hear from you soon..thanks in advance.