If your PC is using CPU instead of GPU, check your cable connections. Use the fixes provided in this article to resolve this issue.
XDA Developers on MSN
Here's how to decide what part in your gaming PC needs upgrading
Change only what absolutely needs it ...
If your PC doesn’t deliver the desired performance in a particular game, it’s usually—but not always—due to two limiting factors. Either your processor (CPU) or your graphics card (GPU) is ...
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