First I'd like to say hi as I just joined this site but I did it most because of a major problem I have with my GeForce GTX 450. So I literally discovered OC and what it does earlier today so I am not experienced with it and almost know nothing about it. It's my birthday very soon and I wished for a new PC, unfortunately my mom told me she won't purchase one for me, so I searched around on the web for a way to make my GPU faster and then discovered OC on a Wikihow site. I read the risks and downloaded all the necessary programs: Heaven benchmark and MSI Afterburner. I followed the recommendation in the beginning to only increase core clock by 10 each time, so I did that for a while until the screen went black in the heaven benchmark - I changed back and proceeded reading the instructions. Later I still wanted to try again and changed back to the speed when my screen went black and this time nothing happened, so I proceeded to increase core clock by 10 until I reached max without seeing any further black screens or glitches or changing the voltage anything. Then, I continued to do the same thing with memory clock (or whatever the name was). In the beginning everything was fine - increased 10 each time and got better and better results, but I got tired and began to increase 20 each time, then 30 each time, then I even increased it by 50 twice and was at 250 (I think) in total and it started to lag and I had lost FPS drastically. I changed back to 200 but the lag was still there so I decided to reset the settings and was worried when the lag persisted. I've tried some simple things such as restarting the PC and uninstalling the programs but without success. So I wonder, did I permanently damaged my GPU or is it possible to fix it, and if so, how? Oh, and I don't only drop FPS in the benchmark, I drop FPS in all games.