Overall the Killer Whale Premium did well in the testing. At the stock system settings it was on par cooling wise with the Noctua NH-C14 with the low noise adaptor. As the testing went on the gap grew slightly, but still close to the NH-C14. Only when the system was pushed to 4Ghz did the roles reverse and the Killer Whale Premium pulled ahead of the Noctua NH-C14.
Even though the Killer Whale Premium has a non standard fan the mount for it will accept any standard 120mm fan. This is nice for a couple of reasons. First is if you have a shallow depth case for an HTPC you can cut 23mm off the overall height by switching the stock 48mm thick fan for an aftermarket 25mm thick fan.