The ASUS CoolTech fan technology proved its efficiency and kept the card running relatively cooler than the comparison cards from NVIDIA and AMD. In fact, during our testing, the maximum temperature recorded for the ASUS card was 66 degrees Celsius. Of course, we can't truly comment how well is this figure without having a reference Radeon R9 280X graphics card and other competitors from its class. For now, the results are looking positive, but further comparisons are needed and this will come about as we test other R9 280X products over the next few days.
For those wondering about noise pollution, there was none to speak of from the ASUS graphics card and we were satisfied with the experience. Once more, we can't be certain if it's AMD's PowerTune that we need to thank or ASUS, but we'll figure that out soon as we get more comparison cards in.
The ASUS Radeon R9 280X card drew the most idle power at 153W, but its measured highest sustained power reading was 383W. Overall, we can see that its power consumption profile was similar to the NVIDIA Georce GTX 770. This means the ASUS R9 280X DirectCU II TOP isn't as power efficient as we would have liked it to be. For one, the GeForce GTX 770 is still marginally faster (although more expensive), but it consumes slightly less power than the overclocked Radeon R9 280X. Considering that both PowerTune and GeForce Boost are effectively trying to maximize the power budget available, we're not surprised of the similar power numbers, but it's a slight let down when you consider that the ASUS card's gaming performance is a little lower than the GeForce GTX 770.
We managed to overclocked the card's core clock speed to 1160MHz, an increment of 90MHz from its rated 1070MHz. For its video memory, we pushed it to a high of 7600MHz, up from 6400MHz. According to the 3DMark scores, this translated to performance gains of roughly 10%. Looking at the performance numbers, this seems to be what we were hoping to get out of the box - at least for a card based on a new GPU. We also took note of its operating temperature recorded during our overclocking exercise, and it peaked at only 54 degrees Celsius (note that the formal temperature test numbers were take from running 3DMark 11, hence the difference in temperature reporting here).