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Well you have two options. One is the RX 560 for around $90 and is 150% faster than your current card, or the RX 570 for around $250 which is over 350% faster than your current card, which is the one I would recommend. However, if your motherboard is not UEFI, then you cannot use them. Also if your power supply isn't up to scratch, you can't use them.
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