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With expensive memory you often some extras. As always Corsair offers a life-time warranty with these memory modules, you can't beat that. Look at the heat spreaders, it's fairly unusual to see a design like that. One thing is a sure fact, you either like or hate the aesthetics. The green PCB bothers me a little though. Styling wise that's a missed opportunity. The sticker with the yellow Vengeance branding .. meeh could have been left out as far as I am concerned.
The heatspreader is designed to enhance heat dissipation allowing (in theory) better tweaks and overclocks. As a result this is not a low profile memory. The idea is that heat is moved away from the actual memory chips and this increases potential overclocking and stability.
Very simple stuff, but the details of the modules can be read from a small sticker. You can spot the SKU code and generic info on there. Also primary info like latencies are displayed. It's good to see voltages being reported on there as well. A lot of memory producers lack this info, yet it is so important. Missing on the sticker is the command rate though.
Last but not least, the actual packaging, so you know what to look for in the stores.