Pramienjager
I see this is an old thread, but I just grabbed an EVGA GTX 770 4GB Classified and am quite annoyed by this bright white light on the side which serves no real purpose and I cannot control it (or so it seems). Why would anyone want such a light on the side of their GPU? Also, a follow up noob question, what is the plug directly next to the lights? Not the SLI attachments, but some other little plug with 10-12 pins. If anyone can help me out here that would be great, I hate to have spent nearly 500$ on a card that is so great but completely detracts from my overall system theme.
Welcome to the forum....those lights are not able to be turned off or dimmed. Some people who don't like them either cover them up with some tape or take a marker and color them to dim them. Keep in mind, anything you do needs to be reversible as it would void your warranty if you would ever need to RMA card. These LEDs have been around since the 680 Classified and has become a Classified signature just like on MSI's Lightning cards. Technically the lights are not pointless, they do serve a purpose. Each one of the 5 LEDs is a tied to a voltage point on the PCB. If one of the LEDs was not lit, it possibly would mean there is an issue with some component on the card. If all are lit, everything is functioning properly.
Regarding the additional plug, that is for a Probe-It connector. It is a small harness that can be used to directly monitor voltages for various items on the card with a digital multimeter (DMM). The link below will take you to the product page.
http://www.evga.com/Products/Product.aspx?pn=W002-00-000010 Hope this helps. Good luck!