Peter, I am a Mac person but my sons use Windows PCs for gaming, so
since nobody else had chimed in, I'll have a go. From what they tell
me, integrated graphics are not good enough for any high-end graphics
processing, which I would assume includes Photoshop.
With the newly released MacBook Air,
Friend of mine asked for advice on what sort of graphics card to put in a
machine he is putting together for his kid. It will be i5 probably, and he
wants to get something that will be respectable with photoshop processing.
An i3 of mine with onboard graphics was definitely not fast enough