Graphics card side connectors (Like PCI-E but not)

techguy11

Distinguished
Apr 21, 2013
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Hey,
I've been doing some research into gaming graphics cards (High end ones) and one thing I have noticed is on the side opposite to the PCI-E connector there is a different connector that uses similar types of connections, what is this and what is it used for? Just out of curiousity.
02G-P4-2763-KR_XL_6.jpg
(The bit in the bottom right corner of the card)

Thanks ;)