The GTX 650 Ti Boost SLI wasn’t too loud, but it was clearly audible. For comparison, the XFX HD 7950 Black Edition was significantly quieter and it used up less power. Of course, the level of noise varies from card to card, depending on the AIB. In this case, XFX did a very good job with the 7950 Black Edition. The dual fan cooler makes XFX’s card one of the quietest HD 7950 cards on the market. We used two GTX 650 Ti Boost cards from two different AIBs, EVGA and Gainward. Neither was too loud, but of course, an SLI setup is a lot louder than a single card. In terms of power consumption, two cards tend to be a lot less power efficient than a single, more powerful card. Fortunately the GTX 650 Ti Boost isn’t much of a power hog and the results were acceptable, provided you have a 650W PSU, or better.