Let’s see, which if the two will be more efficient: MSI Twin Frozr IV or Arctic Accelero Xtreme 7970:
Let’s analyze the obtained results in all three aspects. In terms of GPU temperature, Arctic Accelero Xtreme 7970 is a definite leader. In quiet mode, when all three fans are rotating at 880 RPM, Accelero Xtreme 7970 is 7°C more efficient than Twin Frozr IV at 1730 RPM, and 4°C more efficient in auto mode at 1140-2440 RPM. Only at the maximum speed of 3210 RPM Twin Frozr IV manages to get 2°C ahead of Accelero Xtreme 7970 at the minimal 880 RPM. I believe I don’t have to tell you that the difference in noise in the latter case is simply colossal. As far as the faster fan modes of the new Accelero Xtreme 7970 are concerned, even a very efficiency cooling system from MSI can’t compete against the unbeatable Arctic product. The latter is still 2-7°C better than MSI Twin Frozr IV at its best.
In terms of the VRM components temperature the difference between the tested coolers is even more obvious, and remarkably, not in Arctic’s favor. The unique fans of the MSI Twin Frozr IV create higher static pressure. That as well as better positioning of the fans over the VRM components allows the competitor to cool VRM parts much better than Arctic Accelero Xtreme 7970 can do. While this is certainly important, it is not crucial, because VRM components on AMD Radeon HD 79xx graphics cards are famous for their ability to cope with high operational loads at 100°C+ temperatures, and the highest temperature in our case never exceeded 84°C.
Finally, the third group of results related to the video memory temperature, indicates a smaller difference between the opponents than with VRM components. In fact, it is similar to what we have just seen with the GPU temperatures. Both products cope quite well with video memory chips cooling, but in the end MSI Twin Frozt IV manages to get a little ahead of the Arctic Accelero Xtreme 7970.
While analyzing the cooling efficiency results, it is important to take into account the acoustic performance of both coolers. Let’s move on to that aspect.