Dell typically uses proprietary motherboards that may not fit into a standard desktop chassis, so that will be important to check to see if it meets a standard form factor (my guess is that since it is a Dell, the answer would be no). If it does, then the store can swap the case. It is typically a new system build as it requires full disassembly and reassembly. The tier 1 build charge is $150. I am not sure if there is any additional to disassemble your PC before reassembly.
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