hi i have a evga gtx 660 and i overclocked it and got a stable overclock of 1202 and sometimes it drops to 1186 for a second i have a power target at 110% and when it dropped its only using 106% is this normal oh and my card is always under 65 celsius and today when i was playing battlefield 3 a tank killed me there was a explosion right infront of me and my core clock dropped to 1150