Being from the PCS+ family of cards, the PowerColor PCS+ HD 4890 BF Edition comes factory-overclocked, boasting 950MHz at the core and 4200MHz DDR at the memory. Bearing in mind the reference clock speeds of 850MHz at the core and 3900MHz DDR at the memory, you'll come to realize that these are some formidable clock speeds.
The design of this cooler borrows heavily from the PowerColor PCS+ HD 4870 that we reviewed in September last year, but there are some key differences. The most noticeable difference is the lack of a cooler cover, leaving all the fins exposed. The cooler still has four heat pipes, but they have been repositioned. Sadly, the new cooler isn't particular quiet but it does certainly sound a tad less noisy than the reference cooler - to us at least (unfortunately, we do not have scientific instruments to measure the exact noise level differential).
To add on, this is what the PowerColor PCS+ HD 4890 BF Edition came with: