I apologize 3Dgeo if I offended you by asking some simple questions.
As for my questions there was a very specific reason they were asked and based on your original post they were legitimate questions. The original question was not posed as "I am trying to decide between these 2 kits and only these 2 kits" it was posed as "I am trying to decide on ram for my system and I care more for performance than price and oh here are 2 kits I am considering". You specifically mention that feedback and advice on performance is welcome, this tends to include question and well advice on your needs.
As to the use of ECC ram, I understand you are using a workstation motherboard but this does not necessarily dictate the use of ECC Ram. There is plenty of people that run workstation mobo for non critical applications, I personally run 2 computers both equipped with workstation mobo, one at home and one at work, and neither run ECC ram. The work I do on these systems do not benefit from ECC ram and I prefer to gain the little performance benefit of running non ECC ram.
As to the use of 64gb of ram I was not necessarily trying to save you money but was instead interested in finding you a high performance kit for your application. It is a lot easier to find a 32gb kit rated at 1866 cl9 than it is to find a 64gb kit with the same ratings. If I had to choose between a 64b kit rated at 1600 cl11 versus a 32 gb kit rated at 1866 cl9, I would go with the 32gb kit every time unless I had a specific need for more ram. I do high detail 3d modeling of large complex machinery and have never once exceeded the 32gb in my system, not to say that you will not but I felt it was valid question.
Well I've muddied this thread enough and leave it at that. I hope that you are able to find the information you need to make an informed purchase.
Oh and trust me no Kitties were hurt in my herding efforts
).
