My stationary Acer crashes when I play games for like 3 mins(ex. The Sims 3, Civilization V etc.) It kind of goes to digital saving mode, and its still on, but screen is black. And if I had music it would lagg. This started a half year ago, when I updated the graphics card (NVIDIA). I did the auto-detect graphic card on NVIDIAs site and downloaded the recommended one. But then started the troubles. Iv'e tried these thing: - Restored computer to factory settings - Clean the fan inside computer (due to overheat, but don't know if that's the problem) Here are the computer specs: Operating system: Windows 7 Home Premium 64-bit (6.1 build 7601) System manufacturer: Acer system model: Aspire M5800/M3800 BIOS: Default system BIOS Processor: Intel Core 2 Quad CPU q8300 2.50GHz (4CPUs), ~2.5GHz Memory: 6144MB RAM Video card: NVIDIA GeForce GT 320 Does anyone know what the problem might be ? I'm not so good w computers.. Thanks!