BIOS update is renewing the CMOS BIOS chip software... download the BIOS update installer from the motherboard model downloads.. you have to input your Windows version, 32 or 64 bit and from the results select to download the "BIOS (5)" update.. the download should include instructions to update the BIOS chip software.
You will have to do the download from another computer or better with the old CPU on the M4A88T-V EVO/USB3 motherboard, and after you've updated the BIOS, change the CPU and see if it boots.. it's likely to. Any questions?
http://www.asus.com/Motherboards/M4A88TV_EVOUSB3/HelpDesk_Download/
EDIT: The BIOS update may or not work, depends on the BIOS update version and also on the socket color.. with a white socket chances are poor, with a black socket chances are very good.