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This 12+4pin to 3×8PIN ATX 3.0 extension cable is engineered for next-gen PCI-E 5.0 power transmission. It adapts the new 12VHPWR interface to traditional triple 8Pin GPU power ports, perfectly solving high-wattage power supply matching issues. Premium braided shielding enhances durability and anti-interference performance for long-term stable operation. Compact and flexible for smooth cable routing, it keeps chassis interior clean and improves heat dissipation. Universal for mainstream high-end GPUs and ATX 3.0 power supplies, this black extension kit is a reliable upgrade for modern desktop builds.