I'm new to GPU mining and custom building computers in general.  I have several ASIC machines and have been looking into creating a rig or two for GPU mining.  I know profits are slim right now, but I'm bullish on the long term and plan to HODL what I mine, and I also enjoy the learning process of doing this stuff.  My question is what is the difference between different variation of the same model of GPU.  Everyone refers to stuff as their main model number (1070, 1080 etc.) but if I look for those cards there are tons of variants and large price differences between them.  For example, if you go to the promo store at newegg right now, there are different variants of the 1080 ranging from $669-$809.  I know there are differences in these cards, but will those differences affect mining or are they more of a boost for gaming/graphics?  If there is a difference for mining, what stats should I look to max?  Nobody ever seems to specify info on their cards past the general model number when they post about stuff.  Just trying to learn