Even when intentionally not fully inserted and locked in, the new 12V-2x6 power connector can still withstand over 640W or 55 Amps of power, with thermal imaging showing similar low temps.

Tested over at Hardware Busters. In both scenarios, Hardware Busters found that the new 12V-2x6 connector had no problems outputting the full 660W of power, with thermal readings that were well ...

But here's the really impressive bit. That applies both with the cable fully seated and barely in contact. In other words, you can have the new 12V-2x6 only partially inserted and it won't overheat.

Inno3D's new custom GeForce RTX 5090 Frostbite graphics card is a water-cooled new Blackwell beast, but the 12V-2x6 power cable is absolutely cooking at over 150C+ temperatures.

HardwareBusters and power cable manufacturer Linwell recently posted positive safety test results for the new 12V-2x6 headers that are now standard in Nvidia RTX 4000 graphics cards.

The fact that the updated cable— which is now called 12V-2x6 —seems to have remedied the issue with cables melting could be giving both companies pause as they weigh their options for next-gen ...

The 12VHPWR and 12V-2x6 connectors are both designed to solve a real problem: delivering hundreds of watts of power to high-end GPUs over a single cable rather than trying to fit multiple 8-pin ...

This latest issue appears to be at least partially user error, but the continued problems with Nvidia's 12V-2x6 power connector on a range of cards suggest that a redesign might be in order.