Haha yes it's a nice feeling when collecting coins considering the price of LTC just went up but so did the difficulty 
If you're planning on running 3 GPU's or more on risers, then you'll probably want to make one of the GPU's use a powered riser. You'll avoid burning out the mobo and possibly the cards in the process from all the power draw. 2 is fine tho, mine are on powered risers but I have not utilized the molex connector on them at this point in time and they seem to be doing great without them. When I do add another GPU I'll definitely be plugging one of the molex's in, the last thing I'd want is to ruin 900+ bucks worth of hardware over a silly power overload 
700kh/s is a great rate to start off with, you'll be even happier once you get all your gear out into the open and are able to sail past 730kh/s with ease. If you're really keen, repaste the GPU Heatsink and you would probably squeeze a bit more out of the card.
If you're planning on running 3 GPU's or more on risers, then you'll probably want to make one of the GPU's use a powered riser. You'll avoid burning out the mobo and possibly the cards in the process from all the power draw. 2 is fine tho, mine are on powered risers but I have not utilized the molex connector on them at this point in time and they seem to be doing great without them. When I do add another GPU I'll definitely be plugging one of the molex's in, the last thing I'd want is to ruin 900+ bucks worth of hardware over a silly power overload 700kh/s is a great rate to start off with, you'll be even happier once you get all your gear out into the open and are able to sail past 730kh/s with ease. If you're really keen, repaste the GPU Heatsink and you would probably squeeze a bit more out of the card.
changed ratio to 1022/1244 and bam! running at a stable 725 kh/s with 82temp still in case!!! Going to still take it out as a 2nd GPU will be added soon and then it will be a whole new ball game in temp. but yeah..planning on getting powered and well molex im not even sure how to hook that up but that lesson will have to be learned another day. My brain needs a few days off
Thanks for your help and everyone elses! If anyone needs a little help on tuning a GIGABYTE 7970 give me a holla