Since the memory controller is now in the CPU package, the chipset shouldn't be getting as hot. However, if yours is getting too hot to touch and doesn't have a heat sink already, there are many vendors online that sell various-sized heat sinks.
john_r this one is pretty good http://www.thermalright.com/new_a_page/product_images/cpu_cooler/tb120/tb_reva.jpg I use it on my 920 I also use a 120 mm fan on it.like Mondoman suggested there is some good heatsink out their .I also liked the the thermalright ultra .the fan bracket is better than the black.but they are Hugh I couldn't us the side case fan because the thermalright true black was to close to side case fan.which ever you get make sure it will fit ok first.hope this helps you out.