I started out to do my current build with 32GB, but ended up with 64GB. I was pricing the memory last year and had settled on one 32GB "kit" of two 16GB sticks. However, at the last minute I saw a better price on a 32GB "kit" with the same specs, so I bought that. I didn't realize that it was a single stick and I was giving away half my bandwidth! When I realized that, I just ordered another 32GB stick and called it good. At the time the 32GB stick was only $52 so I just figured "what the hell".

Now the same32GB stick is $300!