Mix'n'matchin RAM

[whereswarren]

Looking to purchase a single stick of Corsair Dominator Platinum 8GB DDR3 2133mhz 1.65v 9-11-11-31, and add it to the system listed below.

The clocks, timings and voltage are all the same- but I'll be introducing a 3rd stick into 2 stick dual channel setup (not sure if that introduces draw-backs?) and also mixing memory sizes (2x4gb + 1x8gb, not sure of compatibility issues with these sort of setups).

If anyone could give me a little advice it would be super appreciated! Cheers.
 

System Manufacturer: Gigabyte Technology Co., Ltd.

System Model: Z87-HD3

Processor: Intel(R) Core(TM) i5-4670 CPU @ 3.40GHz (4 CPUs), ~3.4GHz

Memory: Corsair dominator platinum 2133mhz 1.65v 9-11-11-31 2x4gb 8192MB RAM

Video card: Nvidia geforce GTX770 2048mbs

Power supply: XFX 650w

[KenjiUmino]

12 minutes ago, whereswarren said:

The clocks, timings and voltage are all the same- but I'll be introducing a 3rd stick into 2 stick dual channel setup (not sure if that introduces draw-backs?) and also mixing memory sizes (2x4gb + 1x8gb, not sure of compatibility issues with these sort of setups).

i'd put the single 8gb stick in one channel and the 2x4 gb sticks in the other channel so you have 8gb per channel 

[whereswarren]

Is this likely to be compatible and work?