but as you read Intel has not implemented the DDR3 carefully, but with new CPUs and 8 memory slots it would be possible to use 128 GB ram and eventually 256 GB ( 32 GB Modules ) yes for now
Using 128GB on a single Xeon CPU is already possible with a motherboard like this:
http://www.supermicro.com/products/motherboard/Xeon/C600/X9SRi-F.cfmThe nice thing is that the single CPU Xeons are much more affordable than the Dual Xeons, so you can get a 4 core Xeon with a much higher clock speed for less money (great for meshing, since this part is not multi-threaded so well anyway).
More than 128GB of memory should also be possible, but the 32GB modules are not such a good deal
