Before you guys tell me, I know there's several threads on this topic, however, none of them help me at all. I'm having a big problem with my graphics card, and not even people at NVIDIA can help me. I'm experiencing a problem called DPC Latency, which causes lag in any game that uses my NVIDIA Gforce 540 M card. What happens, is that I'll be playing, and suddenly I'll go through a big lag spike for a few seconds, then it goes away. However, this spike happens every 10 seconds or so, and it really kills gaming for me. This problem didn't happen until November 24, 2012, yet I had gotten it January of the same year. I've tried using different drivers, overclocking, and underclocking (which sort of solves the lag but makes games run awful). Any additional info needed can be given on request, I just really need this problem solved ASAP. Thanks! Also, I'm using a Sony Vaio laptop.