The max memory size supported by this processor is 64GB, if you add more memory could end up with two scenarios; it might work and at the same time it might not work at all. The specifications for this processor are clear the maximum is 64GB, however we know that a lot of users are passing that barrier successfully, but we do not recommend doing it. I would recommend going with the Intel® Xeon® Processor E5-1630 v3 (10M Cache, 3.70 GHz) Specifications since this processor can easily support 128 GB.
That is actually pretty cool. With a buffer size like that I feel like you can disable the Windows Page file and buffer all of the system services in to ram. It still does suck though because most apps are still under the X86 32 bit model. Meaning that an app can only recognize 4 Gigs of ram tops due to the base 2 limitation under a 32bit addressing space.
This boundary breaking should encourage 64 bit app design, for gaming and multimedia.