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This gold-plated PCIE 1X to 16X multiplier riser adapter is specially customized for BTC Bitcoin and cryptocurrency mining rig construction. Adopting premium gold-plated metal contacts greatly enhances electric conductivity, effectively avoiding poor contact caused by oxidation during long-running mining work. The 1-to-2 expansion design turns one motherboard PCIe X1 slot into two full-size PCIe X16 interfaces to mount multiple mining graphics cards, maximizing motherboard slot utilization. Built-in independent USB3.0 hub optimizes internal cable arrangement, eliminating messy wiring troubles of multi-card mining equipment. Well compatible with most NVIDIA and AMD GPUs and mainstream desktop motherboards from ASUS, MSI, Gigabyte, Lenovo, HP and more. Ideal accessory for open-frame mining racks, home-built crypto mining rig and large-scale mining farm equipment upgrade to improve mining layout efficiency.