"In this review Frostytech is checking out the boxy BeQuiet's Shadow Rock 2 heatsink which stands 159mm tall and weighs in at 1120grams. This heatsink has a footprint of 122x122mm without a fan, 122x149mm with the supplied 1600-800rpm, 120mm PWM fan installed."
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips