Nope, I changed it(My Reply) , it's worth the try since I'm not too sure, a triple channel set of RAM will work in Triple channel only with 3 Sticks of the same inserted. If 2 were inserted from the set, I think Dual Channel would be possible. Use 2 sticks from your older RAM and use 2 sticks from your new RAM put each set in the like colored slots and see if it shows up in the BIOS.
If it does, boot into windows and check with CPUz as to what it says about your RAM. If possible post a screenshot of the CPUz Memory Tab and 2 Screens of the SPD tab with each different Memory Selected in there.