I overclocked it before, but never in the weeks before it started to run slow. The connectors are directly to the card. May I add that before I had and hp machine with the 600W psu and GTX 560 TI. Everything was fine then and this never happen. Just recently was when this problem occurred, after I got a new motherboard and case. I had the card for about 6 months now and its been fine. Same goes with the psu. Must be a driver thing then I guess?