Lol, I never saw a Core 2 Solo or Core 2 Duo (like the 13” MacBook Pro we’re talking about) with a graphics card on the same die as the CPU. It wasn’t until the first i3 and i5 that Intel started to integrate (literally, this time) their GPUs in the CPU die, that’s when it started to be literally integrated within the CPU die. But we’re talking about chips prior that era.
If you want it, the “integrated graphics” expression used back then was probably referred to being integrated into the motherboard or the chipset.
I just needed to make a quick search of my old 13” 2010 MacBook Pro, and the first review, not less than from Notebookcheck, one of the most renowned websites of tech reviews, to see how “back then” people referred to it as integrated graphics. Was it literally integrated into the CPU? NO because that came later, with the new generation of Intel i3 and i5. But, again, we’re talking about technology previous to that gen.
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I don’t really understand why make such a big deal of it, if I (and professional reviewers) want to call it “integrated graphics”, when I honestly think most of us understand what we mean, regardless of where’s the GPU.