You have the fan in hand, you can measure it with a ruler across the middle of the fan and find out the size in millimeters. You could also take the fan off the card, because the size of the fan may be listed on the sticker on the back of the fan. I couldn't find a review that simply stated the fan size. You would have to find a tri-mounted fan of roughly the same size, depth, voltage and exactly the same number of fan power pins.