In this day and age, most of the CPU coolers on the market are almost identical. The introduction of the heatpipe really closed the gaps in the market for one company to have a superior cooler. So, what companies like ZEROtherm have done is to create some sort of flair with the shape of the actual cooler to attract the attention of the customer: in the case of the BTF90, which is a butterfly design. Don’t let this shape fool you - every turn or notch actually creates a larger surface area, and we all know that a larger surface area cools an object more efficiently. Each wing of the butterfly is its own separate cooler with a plastic divider down the middle, thus giving you four heatpipes in each wing. Let’s see how well this cooler flies and get on with the review.