Facinating study. I'm running a triple channel Xeon, and I have noticed a marked benchmark increase when using it in triple as opposed to just dual. I figured it was just the flat increase of another 4 gigs, but I suppose this study would make sense for explaining the increases I saw. That said, it is correct that increasing the mem will strain the clock, especially if your OC. I had to tweak my CAS downward when I swapped over to triple channel
In your case the memory bandwidth increased when going from dual to triple channel. That can make a noticeable difference.
Im not complaining mind you. 6 cores 12 threads for 75 bucks and free memory from discarded rigs from work. Cinebench scores are comparable to i5 or first gen ryzen. If tweaking the mem is the price for that, is gladly pay it again
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