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https://matrixwarehouse.co.za/product/ps-2-male-to-usb-female-convertor/?utm_source=Google%20Shopping&utm_campaign=Copy%20Google%20shopping%20&utm_medium=cpc&utm_term=4534
Is there a available pcie x16 slot open and empty one next to it. What gpu do you want to install? Is the psu big enough for it? You will need a low profile gpu