A copper cap that uses the same principle as the Intel Pentium 4 CPU (and which should have been adopted by AMD way back IMNSHO) to protect that fragile CPU core is being reviewed by Overclockers Australia right here

The “cap” works. The CPU is much safer with this cover. Only really extreme pressure extended on the heatsink could damage the core. However, the cap is naturally slightly increasing the core temperature.

They should bundle that thing WITH the CPU. Man, the Athlon core is fragile. The sweat was pouring off of me the first time I fitted one of those....