There are many internal variations of the C64 motherboard.  Some have IC sockets and proper metal heatsinks.  Later versions came with zero IC sockets and no heatsinks!

These adhesive heatsinks will keep your chips cool and prevent overheating. View my other listing for C64 IC sockets. 
   

• Easy to install. 
• Each Kit includes a set of 13 heatsinks.   Photo is for example only. Your motherboard variation may look different.

• Properly Sized and do not overhang on the C64 chips.

• Each heatsink includes quality high conductivity thermal adhesive tape.  Please clean the chip before applying heatsinks.