So I've been contemplating recently on further overclocking (my system has a small overclock already from OC Genie) and decided to download some stress tests to see what temps I'm getting. I noticed that the highest temperature I can get my GPU to is 65 degrees C at a 100% load. I also noticed that right at the beginning of the stress tests, the temperature jumps from the idle temp (45-55 degrees) straight up to 65 degrees and just stays there for the remainder of the stress test, is this normal?