Hi A couple of weeks ago I built a low end system for use at my flat, specs as follows: Gigabyte H61M-DS2 Intel® Core™ i3-2120 Processor Corsair XMS3 8GB DDR3 1333Mhz RAM MSI N560GTX-TI-M2D1GD5/OC Corsair CX500W PSU Because of delays in shipping, my GTX 560 Ti was not installed until yesterday. For the last couple of weeks I have been making do with a GT 220. I had no problems using the GT 220. However, when I installed the GTX 560 Ti and installed the drivers, I started getting crashes in game. In Call of Duty, I get an error with the following message: "Direct X has encountered an unrecoverable error. Check the readme for possible solutions" In this case, the screen will freeze for 20 seconds or so, and will start responding again. Upon tabbing out of game, the error message is shown. While I am on my desktop, I sometimes also get crashes, the screen will go black, and after 10 seconds, an error message appears saying: "Display driver Nvidia Windows Kernel Mode Driver Version 295.73 (I downgraded the driver in hope of fixing the crashes, without success) stopped responding and has successfully recovered" I also get freezes in League of Legends. The screen will freeze for 20 seconds or so, and will respond again. The last type of crash, again in Call of Duty, is when my PC becomes completely unresponsive, and the only solution is to restart my PC. I can't check my temperatures while my PC is frozen, however when/if it responds, the temperatures on Speedfan look normal, in the 40-50 degree range. I do not have any other games installed at the moment, so I am unable to test if the problem is limited to these two games. My second problem is with a clicking sound coming from within my PC. The sound seems to come from inside the PSU, and if I tilt my case in a different position, the sound will get quieter/dispersal. Should I be worried about this? It sounds bit like plastic hitting a fan spinning at high speed. I am unsure if I had this problem before I swapped my GPU. Any help with either of these problems would be greatly appreciated. Thanks.