The Retouch Artists test was the one doing the rounds a couple of years back, got pretty popular. Just consisted of a few different things like duplicating layers, cropping, changing colour spaces, sharpening, upsizing, adding a border. Kinda common tasks done in Photoshop. Problem was the source image was a 3.5mb jpeg or something, so computers were doing the whole action inside of 3gb of RAM and not actually giving you a good representation of how fast your computer would handle editing something worth using Photoshop for (IE an 8/16bit TIFF from a DSLR). It was pretty much just telling you how fast your CPU was, and well, plenty of things can do that. As soon as you fed the same action a 35mb tiff it started to inspect more aspects, like increased RAM capacity, scratch disk speed, was a much more rounded test.