Hm. They shouldn't normally get that hot. When I was testing out high overclocks it would crash if the VRM hit 120C, but if it hasn't for you then that's pretty lucky. Still, it could be that they assembled it wrong or something. I've replaced the stock cooler because it's loud as hell, and I noticed that they use thermal tape between the VRM and VRAM and the solid metal base of the cooler.
A possibly simple solution could be to buy some GPU heat sinks (small ones for VRAM) and put them on the other side of the PCB to help with heat dissipation. You can see how mine are, and also note that I have a fan blowing directly on them: