Thermaltake A1671 Volcano 10+ CPU Cooler for AMD Athlon XP 3400+ and Sempron 2800+ Designed for AMD Athlon XP up to 3400+ and AMD Sempron up to 2800+ Opti Fin, Cu-Cu soldering heatsink Tool-less clip, 3-point fixed Interface Material: PCM 45 With larger pure copper base, heat is absorbed and transferred to the fins more efficiently