Try Booting up with 1 stick of ram in different slots try them both.
Is it a brand new drive? If so, you might have to go into disk management and initialise it, then set up the partition and format it.
right click my computer, manage, disc management and see if the HDD is there. If it is right click it and click simple volume. Second HDD wont show up unless you set it up in windows.
If its your only HDD then make sure you check your power connector and SATA connection. If that still doesn't work I would say your HDD might be faulty.