Optiplex 7010 3 ram slots theory

I discovered a way to be able to  use 3 difrent ram sticks on a motherboard

First of all you have to insert the first stick in the 1st slor and then the 2nd one in the 4th. And then you have to boot up your pc and you have to go to the bios!(BIOS version dosent matter) and then turn off the pc and do not turn off the power supply.connect the 3rd ram stick to toe 2nd slot and start your pc and you are done

This worked for me and i hope it is gonna work for you too