GIGABYTE AMD Radeon R9 390 WINDFORCE 2X and GIGABYTE AMD Radeon R9 280X OC WINDFORCE are both graphics cards with the same GPU Interface (PCIe x16), GPU Memory Type (GDDR5) and GPU Clock Rate (1000 MHz). The main differences are in GPU Gaming Performance (Rasterization) (+46%), GPU Chipset, GPU Memory Size and GPU Memory Interface.
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