4890 v1.0 vs v5.2

So I have had my 4890xt since it first game out, it is a v1.0. I recently got another one for $85 that is a v5.2. The PCBs are different colors and heatsinks slightly different.

I'm just being curious now, are they any key hardware differences between the revisions?

can u take a picture or link one of the card, most of the time the cards past 1.x are non reference so no voltera pwm, so no over voltage control