Installation and Finished Product
Looking at the back of the motherboard, there isn't a back plate used with the NH-L9i, just the addition of the four screws. The nylon washers will isolate these screws and keep things from shorting out.
Once the NH-L9i is securely mounted, I stepped back to see that this cooler is in no way going to encroach on any of your memory choices, nor will it block any of the slots. The same can be said for this cooler not encroaching on the PCI-e slots either, so even with a Mini-ITX system, there is no need to worry about that happening.
Since I am testing in an open air system with the board lying flat, the heat pipe orientation shouldn't matter. On that note, I didn't see where it said it shouldn't be installed any certain way, but I would assume the pies going side to side would work best.
This is what will really show why this cooler is so special. For those of you that have dealt with SFF chassis before, tower coolers and smaller coolers just won't fit. With the NH-L9i the cooler is shorter that the memory and only the fan is peeking over the top.
I like that there is enough height under the cooler to tuck in the fan cable and get that wiring managed. I also like the fact that there are no issues with clearance of the CPU power delivery heat sinks already on the board. You can also set this cooler to deflect its exhaust to the hotter heat sink and offering it some airflow to help keep things cool.