OS: Windows XP CPU: AMD Sempron 2400+ RAM: 1024Mb Graphics card: Nvidia GeForce FX 5200 I recently installed Need for speed underground 2 on this system. The menu navigates fine and theres no problems at all. Until i start driving about. Sometimes it pauses for a few seconds at a time and then the graphics corrupt and polygons fly everywhere with strange textures, like below: I've updated my Nvidia drivers, Direct X drivers and also patched the game to the latest [1.2] version. I've also tried older nvidia drivers but with no result. It's not the power supply as i have a 450watt PSU. I tried installing it on another computer and it works fine, the other system has the same CPU but less RAM and an older graphics card. I also tried lowering the hardware acceleration in my Nvidia properties. Still no luck although it does seem to delay the freezing slightly. ALSO, my machine works fine with battlefield 2 [other most recent game i have] and the graphics turned up a bit. Does anybody have any idea what is causing this? Thanks for your help in advance.