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Black sleeved cable with four 8-pin connectors merging into one 16-pin 12VHPWR plug

EN-Labs

EN-Labs 4x PCIe 8-pin to 12VHPWR 16-pin internal power cable 1.3 ft

SKU CH-T371-N3J3Q

Converts four PCIe 8-pin PSU connectors into one 12VHPWR 16-pin GPU plug, supports 600 W and fits RTX 4090, 4080 and 3090 Ti

  • Converts four 8-pin PSU connectors to one 12VHPWR 16-pin GPU plug
  • Delivers up to 600 W through 18 AWG tinned-copper conductors
  • 3 ft sleeved length keeps cable routing tidy
  • PCIe 5.0 12VHPWR interface supports RTX 4090 4080 3090Ti
  • Alloy copper terminals ensure stable high-current contact

12VHPWR 16-pin adapter cable for high-end GPUs

This EN-Labs internal power cable converts four PCIe 8-pin (6+2) connectors from a power supply into a single 12VHPWR 16-pin (12+4) connector for a graphics card. It is built with 18 AWG tinned copper conductors and a nylon-sleeved jacket. The cable measures 1.3 feet in length and supports up to 600 watts of power delivery. It is designed for PCIe 5.0 and ATX 3.0 compatible systems.

Suitable for builders

This adapter suits builders upgrading to a 12+4 pin GPU such as an RTX 4090, RTX 4080 or RTX 3090 Ti whose power supply only offers native 8-pin PCIe outputs. Four unoccupied 8-pin ports on the PSU are strictly required for safe operation. It is not suitable for GPUs using the older 12-pin connector found on standard RTX 3090 cards. Builders whose PSU has fewer than four available 8-pin ports should look at alternative power solutions.

Requires four 8-pin PCIe ports on the power supply

The single specification that decides compatibility is the availability of four unoccupied 8-pin (6+2) PCIe connectors on the power supply. The adapter terminates in one 16-pin (12+4) male plug rated for 600 watts maximum output. Using fewer than four input connectors risks system damage and will not deliver the rated power. Verify the PSU connector count before purchase.

How it compares

Measured against everything we stock in Internal PSU & Riser Cables, at today’s prices. Recalculated every night.

Price $18.99
Pricier than about 60% of the 7,839 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Does the cable include the four 8-pin connectors or do I need to buy them separately?

The cable has four 8(6+2)pin female connectors permanently attached, so nothing extra is required.

My PSU only has three 8-pin PCIe ports — can I use this cable?

No, the cable requires four unoccupied 8-pin PCIe ports on the power supply to deliver up to 600W safely.

What does the 600W rating mean for an RTX 4090 under load?

The cable is rated for 600W maximum output, matching the 12VHPWR specification for RTX 4090 and RTX 4080 graphics cards.

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