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
Enabling your CPU's iGPU can be a game-changer for your gaming PC
Let's stop underestimating integrated GPUs ...
The main processor (CPU, “Central Processing Unit”), the main memory (RAM, “Random-Access Memory”), and the dedicated graphics card with its graphics processor (GPU, “Graphics Processing Unit”) are ...
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