Electrical

12VHPWR

The 16-pin (12+4) power connector that can carry up to 600 W to graphics cards; known for heating problems with poor seating and sharp bending.

// EXPLANATION

600 W at 12 V is about 50 A; even a tiny contact resistance at each pin produces large heat through P = I²R. A connector that is not fully seated, or a cable bent sharply right at the plug, upsets current sharing between pins and can lead to melting. The later 12V-2x6 revision aims to reduce this risk.

// ALSO KNOWN AS

12VHPWR12V-2x6

// RELATED TERMS

Contact resistanceThe extra resistance at the point where two conductive surfaces meet, caused by surface roughness and oxidation. Joule heatingThe conversion of electrical energy into heat, P = I²·R, as current flows through a conductor. Power supply unit (PSU)The unit that converts mains AC into the low-voltage DC (12 V, 5 V, 3.3 V) a computer needs.

// ARTICLES THAT MENTION THIS TERM

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HARDWARE HARDWARE September 9, 2026 User Error or Engineering Scandal? Why 12VHPWR Connectors Melt Imagine buying a brand-new flagship graphics card, only to smell burnt plastic a few weeks later and find melted latches and fused power pins. Here is the physics behind it… 4 MIN READ #HARDWARE

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