I'm thinking of getting some good copper heat sinks to cool it down and maybe reduce hardware errors.

Something like this:
http://www.ebay.co.uk/itm/New-8pcs-Copper-Heat-Sink-Heatsinks-Cooler-For-PC-Computer-DDR-DDR2-Memory-RAM-/150934744374?pt=UK_Computing_Memory_Chipset_Cooling&hash=item2324696d36

or this:
http://www.ebay.co.uk/itm/Copper-Heat-Sink-For-DDR-DDR2-DDR3-RAM-Memory-Cooler-/390512454152?pt=UK_Computing_Other_Computing_Networking&hash=item5aec5b2a08