Ok, So let me tell you why the memory temps are bad, its because ASUS in all their wisdom used a thin heatspreader instead of having the memory cooled through the main heatsink itself.
So onto to a possible solution which has atleast brought down memory temps slightly.
Get a 2 mm thermal pad and slice 3 strips that can be placed ontop of the heat spreader on 3 locations where the memory sits. This will then allow connection between the heat spreader and the main heatsink, therefore allowing heat to be sent to the main heatsink.
I saw a temp drop of around 7c on the memory and I used some cheap pads. You can try good thermal pads and should get better results.
Also put the memory controller voltage to 1300.
