Unless you're plugging into a two-prong outlet, the case will be grounded to your room anyway. Which means essentially, your case is part of the carpet.
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San Francisco: Gigabyte GA-Z77X-D3H | Intel i5-3570k @ 4.5ghz | 16 GB DDR3 @ 1866 | Gigabyte WF3 7950 @ 1125/1500
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