Corn Electronics 16-pin (12+4) to 4×8-pin PCIe 5.0 extension cable 14 inch 16AWG black

Simple 12+4-pin power conversion

This cable converts four 8-pin PCIe connectors into a single 16-pin 12+4-pin plug for RTX 4090 4080 4070 and 3090 Ti graphics cards. It replaces the bulky factory adapter with a sleeved 14-inch extension that includes cable combs for a tidy internal layout. The 16AWG tinned copper conductors are thicker than 18AWG alternatives to reduce voltage drop. Builders who need a native 12VHPWR power supply cable cannot use this product.

Sustained 600-watt delivery

The 16AWG wire gauge supports continuous power draw up to 600 W without the voltage sag that thinner cables exhibit under prolonged gaming or compute loads. Each of the four 8-pin legs should connect to a separate PSU PCIe output; using a single cable with daisy-chained 6+2-pin plugs is not supported and can cause instability. The PCIe 5.0-rated construction maintains steady current during extended high-load sessions. Systems with power supplies below 1000 W may not provide enough headroom for stable operation.

Cool and quiet cable routing

The flexible black sleeving and included combs let you route the 14-inch length cleanly behind the motherboard tray or along case channels, eliminating the airflow obstruction of the stock adapter. No active cooling or moving parts are present so the cable adds zero noise to the build. Lower resistive losses in the 16AWG copper keep the cable itself cool even at maximum rated load. The compact footprint suits standard ATX cases without requiring extra clearance.