Ok, you have a "quad-channel" kit of RAM, which is what, four sticks? You have a mobo with four DIMM slots, and operates in "dual-channel". Yes, that will work. They will just function in dual-channel.
The channel-ness, comes down to the memory controller, which is in the CPU these days. It's not some inherent property of the kit, per se. The only reason that quad-channel kits even exist, aside from marketing purposes, is also, compatibility and warranty. A quad-channel kit, is specifically tested and warranted to work together.
You can get the same RAM stick model number, in two dual-channel kits, but they aren't tested and warranted to work together in quad-channel mode, even though, due to the chipset, they will, technically-speaking.