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Re: External game graphics card

With a Celeron CPU, even if you could use an external GPU (which you can't, for the reasons ejn63 described), the CPU would become a major bottleneck to the GPU.  And since you didn't specify the exact Inspiron model, I can't be certain about this, but I'm going to guess that a Celeron-based system doesn't have a lot of RAM installed and probably has a low maximum memory capacity as well, which would become another bottleneck for most games.  If you want to play modern games properly, you'll need a better system overall.

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