Conclusion: Looking at the overall layout of the R6870 Hawk, you can see that the PCB is about the same as the reference card, but the Twin Frozr III is obviously bigger than the stock heatsink. The twin fans (or propeller blades as MSI likes to call them) take up the majority of the card. And while these fans are the same size as those found on Twin Frozr II cards, they are not as big as the Twin Frozr III fans on the N480GTX Lightning card, which was a behemoth in itself.
Excerpt: With the R6870 Hawk , MSI has added some extras and improved the performance of the basic 6870. It uses a custom ‘Propeller Blade’ cooler which MSI says can deliver 20 per cent more air to the card, along with voltage and power tweaks to allow for higher clock speeds, and slightly better gaming performance. This allows it to compete more effectively with the GeForce GTX 560 TI , an improved version of nVidia ’s equivalently priced card.