Compare on-board graphics engines with graphics boards

Not so much a question as a request. The Tom's team does a great job testing the various graphics from hottest to average and making recommendations. For gamers looking for the maximum affordable performance, that is way cool. However, I'm trying to decide if I need a separate graphics card for a new computer, where the chipset has built-in graphics. While certainly not suitable for hard core gaming, ther is no way I can find to compare the performance of, say a Q35's graphics engine with a mid-range external card.

If your team could simply include a couple of current generation motherboards with on-board graphics in your comparisons, it would be incredibly helpful to a broad range of people. Even if it is not an exact apples-applec test, a rough order of magnitude figure would be a billion times better than is available now.