32GB is overkill for gaming, 64GB is double overkill, you really only need 16GB, a 4x4GB kit would serve you well. And save you money - if your intent is still to upgrade to 64GB in the future - because you can't really mix DDR4 kits so you'd have to sell your existing memory anyhow. Titan X cards (with their onboard 12GB) require 16GB or more main memory, any less slows them down. Heavy allocations in RAM Disks or SDD caches can fill up memory pretty quick - although you've chosen a performance SSD so you don't
really need to allocate huge chunks of costly memory for extra performance gains. A second SSD in striped RAID would probably serve you better than another 32GB of DDR4, lol. (But, hey, if you really wanna buy some big DDR then send me a PM, lol.)
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