You could just sell the 1650 and get an i7 4930k instead. Nearly identical in specs and they sell for cheap on Ebay (last I saw about 4 months ago)
If you take a gamble and try to modifly the BIOS there's a very good chance things can go wrong and you'll turn the motherboard into a paperweight. Why not just sell the CPU and motherboard and buy a CPU/motherboard combo that is compatable with each other.