So I am trying to build a computer and I am looking for a reasonable graphics card. I was looking at the Rx580 o4g and then about a week or two later came across the XFX Rx580 o8g. I was just Wondering what the difference between the two were because the Rx580 o8g seems to be the one I would want to go with on paper. The pricing difference is so small ($10 on amazon) that I was wondering if there is some huge downside to choosing the Rx580 o8g compared to the o4g