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The SAPPHIRE PULSE AMD Radeon™ RX 6400 Graphics Card runs on the cool and efficient Axial Fan coupled with Fuse Protection built into the circuit of the external PCI-E power connector to keep the components safe. Dual Ball bearing fans ensure a quieter operation and longer lifespan to increase product longevity. * Boost Clock: Up to 2321MHz* Memory: 4GB/64 bit DDR6. 16 Gbps Effective* Stream Processors: 768* RDNA™ 2 Architecture* Ray Accelerator: 12