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The NVIDIA GeForce RTX 5090 graphics card can be powered using 3x8-pin power cables, with a modest 5% performance drop. According to tests conducted by tech media outlet ComputerBase, the RTX 5090 boasts a default TDP of 575W. NVIDIA officially recommends a 12V-2x6 connector capable of 600W or four 8-pin PCI power cables for optimal performance. However, for users reluctant to upgrade their power supply systems, utilizing three 8-pin power cables (totaling 450W) offers a viable alternative. Despite limiting the TDP of the graphics card, this setup allows the RTX 5090 to boot and operate, albeit with an average FPS reduction of around 5%. This minor performance hit may go unnoticed in everyday use, presenting a practical compromise for those seeking to maximize their current hardware.
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