CableMod 12VHPWR Custom Cable Overview

CableMod also makes 8-pin to 12VHPWR adaptors

CableMod offers their customers two types of 12VHPWR cables to their customers, direct cables that connect directly to your power supply, and adapter cables that can adapt 3×8-pin or 4x 8-pin power cables to 12VHPWR. On page two we discussed the former, and here we will discuss the latter.

With each 8-pin PCIe power cable being designed to deliver 150 watts of power each, users of 12VHPWR adaptors should ideally use four of these cables to power a single 12VHPWR connector. That said, modern power supplies have a large safety margin, and many GPUs have been known to exceed this wattage limitation, especially when dual GPUs like the Radeon RX 295X2 existed. This is why CableMod can confidently offer users 3x 8-pin to 12VHPWR cable adaptors. 

What is difference between CableMod’s 3x 8-pin and 4x-8-pin adaptors?

Below is what CableMod has to say about their 12VHPWR adaptors.   

WHAT IS THE DIFFERENCE BETWEEN 3 X 8-PIN AND 4 X 8-PIN 12VHPWR CABLES?

Both the 3 x 8-pin and the 4 x 8-pin versions of our 12VHPWR will work with the new NVIDIA 40 Series GPUs, provided your PSU meets or exceeds the minimum wattage requirements. The reason we offer both of these is for users who want extra redundancy for the power being supplied to their GPU.

DON’T PCI-E PORTS ONLY PROVIDE UP TO 150W PER PORT? HOW IS IT THAT A 3 X 8-PIN CABLE CAN BE SUFFICIENT TO POWER GPUS THAT REQUIRE UP TO 600W AT PEAK?

In truth, an 8-pin PCI-e port on modern PSUs can supply over 300W of power each (up to 342W, depending on model). Thus, two 8-pin PCI-e ports are more than enough to provide the required 600W. We provide both 3 x 8-pin and 4 x 8-pin versions of this cable for extra redundancy.

**Please note that all 8 Pin PCI-e plugs need to be plugged in for the cable to function properly. If you order a 3 x 8-Pin or 4 x 8-Pin to 16-Pin, make sure that all of the 8-pin connectors are connected correctly to your PSU.**