Dimensions of the 8RDA+ NB & SB chips?

I have a couple of *custom* heatsinks available to me. I don't have my 8RDA+ (yet), so I want to find out if I should pick up a pair of these heatsinks.

Does anyone know the physical dimensions of the northbridge and southbride on the 8RDA+? I want to make sure the heatsinks cover the chips completely. It would also be great to know the hole spacing for each bridge as well.

Thanks in advance...

FWIW: I tried to did this info up on nVIDIA's website but had no luck