So yesterday my MSI R9 270 arrived, and I finally started using my computer for gaming. My FPS was great at first, but then I realized that every couple of seconds my fps would fluctuate from the regular 60+ fps all the way down to about 10 fps. At first I thought, "Hey maybe I just can't run this game at all". Then I thought "Oh yeah I'm playing minesweeper". But on the serious side I'm pretty sure that I should be able to play CS:GO at low settings with no fps drops. This doesn't only happen in one game this also happens in Minecraft and Sleeping Dogs. I checked the temperature of the CPU and it was at 75 degrees celsius and then I kinda started freaking out because I knew that it was way too high. When I'm not gaming it stays around 35 degrees and I think that it's a good temperature. Since I only started gaming on this PC yesterday, I never really noticed this until now. Please help me.