what is expansion card describe 2 of them ?
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Sound cards expand the sound capabilities of a PC. They are popular with gamers and those who watch videos, and/or television, on their PCs. With a sound card, a system can go from mono sound, to stereo sound, to surround sound.
They can also allow the addition of multiple monitors. One of the ways that they increase performance is by taking the workload off of the CPU and transferring it to the video card. A good video card is a good investment.
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