Hey, I have just got my new radeon hd 6870 for Christmas, today, and I have been getting lag on crysis, highest settings, the fan is on about 40% and 64 degreese Celsius, and have about 20-30Fps without recording, 1080p. How will I max it out with higher frames and I can overclock it, but I want to maintain a good temp. Please help :/ is it a good system I have? Check my specs please 