The per-channel number[1] is much better (imo) for napkin spec'ing because it's what you'll get in a typical networked application that's already done and minim

The per-channel number[1] is much better (imo) for napkin spec'ing because it's what you'll get in a typical networked application that's already done and minimised stalls. But you're raising a good point: If you can arrange your data set across the physical DIMMS yes you can get much another 10x, and maybe the contortions you need to do to get it can be worth it (if you're actually memory bound). [1]: better link, since the one you posted is bust: https://developer.amd.com/wp-content/resources/56301_1.0.pdf https://developer.amd.com/wp-content/resources/56301_1.0.pdf