I have a few questions about memory upgrades. I currently have 16gb, but for what I've been doing lately that just isn't nearly enough. Ideally I'd have 64GB+, but I cannot afford that - unless I find some deal on ebay. So I am aiming for 24-56gb. My question here is this. My Dell Precision system takes DDR3 1866 ECC registered ram. Will any ram that meets this specification work, or should I get the "system specific" ram at a premium? Also, I sometimes see RAM for pretty cheap on ebay. I am assuming that it's being pulled from servers, but I've also heard of "counterfeit" memory on ebay being listed at one size but you end up with something significantly smaller, though I've only heard about this with memory cards. Last, my system has two Xeon processors installed. I currently have two 4gb modules installed on each processor. When I upgraded to 16gb I bought one 8gb module. Does anyone know if this might result in any stability or performance issues; when upgrading should memory configurations ideally be matched on both processors, or is it OK to "mix and match"? Thoughts?