Gigabyte Neon Cooler 8-BL Athlon64 Heatsink
"The Gigabyte Neon Cooler 8-BL is one of small series of mainstream heatsinks manufactured by Gigabyte, and differs from the Neon Cooler 8-Pro version only by its lack of a separate fan speed controller. The Neon Cooler 8-BL (GH-ED821-LC) heatsink is an aluminum extrusion design, and it incorporates an inlaid circular copper base. The copper pad is set into a machined recess in the aluminum base and helps to transfer heat energy from an AMD Athlon64 processor's IHS to the surrounding heatsink more efficiently. T6-6063 Aluminum has a thermal conductivity of 193 W/mK, whereas copper is much more thermally conductive at 398 w/mK."