I think you are confusing Dual Channel, Tri , or Quad Channel RAM.
Your CPU supports dual channel ram. Even though you have 4 slots, it is still dual channel.
If you had an i7 on a 1366 motherboard then you could support 3 channels and have 6 sticks of RAM.
You can put 4 sticks of RAM in dual channel mode even with a Pentium 4. LOL