Dual Channel memory

[twentytwotwo]

I have a gigabyte p55m-ud2 motherboard and i have 2x2gb of ram inserted in dual channel configuration.
The problem i have is that my heatsink covers one of the ram slots, which is the third slot.
My question is that if i insert 1 ram stick into the 4th slot will that disable the dual channel on the sticks in slots 1 and 2?
I know inserting the 1 ram stick in slot 4 will not be in dual channel because you have to insert in pairs but will it affect the other 2 sticks that are inserted in the first 2 slots?
Thanks

[Salem]

Crazy idea, but how about
http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=3165
downloading the manual and reading it?

[twentytwotwo]

Crazy idea, but how about
http://www.gigabyte.com.tw/Products/Motherboard/Products_Overview.aspx?ProductID=3165
downloading the manual and reading it?

Thanks for your non sarcastic advice and I have already read it and couldn't find myself a clear answer which was why i asked for help

[Salem]

Thanks for letting us know that you've RTFM.
Better late than never I suppose, at least I won't have to waste any more time on you.