If you ever have the need to use After Effects, know this: in AE-Land, the more memory, the better.
On this mobo you have to ditch all your memory and get 4 new 8 GB sticks. It hardly seems worth the expenditure, since you have already given up 10 - 15% performance on your graphics card by using the Areca raid controller. Just one of the limitations of the mobo you use. I don't think you will really benefit from it, unless the budget is there, but even then, I would prefer a X79 mobo.
Moved to Hardware forum
Dave, I don't now nor do I plan to get into AE in any serious way, so that's not an issue.
Harm, I'm stuck with that mobo for awhile, having purchased it not too long before the X79 series came out. The thought of replacing it so soon gives me the blues. I knew I'd have to acquire 4 8gb sticks, and eBay the 4 4gb sticks. But if there's absolutely nothing to be gained by going to 32gb, then I'll save some coin for the next sys upgrade.
That seems the more sensible and logical step. Increasing memory now would probably only give you marginal benefits and still leave you with the doubt whether you can port that memory to a LGA 2011 platform, given all the memory issues on that platform.