Do you have a 12VHPWR (PSU) to 3 x 8-pin PCIE (GPU) cable?
Sorry, such cable does not exist.
Technically you cannot use a 12VHPWR port (from PSU) to split out 3 x 8pin PCIE (for GPU), because there are only 6 x +12V leads (pin 1 to 6) from a 12VHPWR port.
But you will need 9 x +12V leads for 3 x 8pin PCIE (each 8pin PCIE requires 3 x +12V).
This is why you cannot power a 3x8pin PCIE GPU from a 12VHPWR PSU port. You should use 3 pieces of regular 8pin to 8pin PCIE cables for this type of GPUs.
However, if you only need 2 x 8pin PCIE (for the GPU), you can use 12VHPWR to 2 x 8pin PCIE cables. They will work perfectly fine because a 12VHPWR port provides 6 x +12V, and dual 8pin requires 6 x +12V.
ATX 3.0 PCIe 5.0 600W 12VHPWR 16 Pin to Dual 8 Pin PCIE Power Cable
ATX 3.0 PCIe 5.0 600W 12VHPWR 16 Pin to Dual 8 Pin PCIE Adapter Cable
Technically you cannot use a 12VHPWR port (from PSU) to split out 3 x 8pin PCIE (for GPU), because there are only 6 x +12V leads (pin 1 to 6) from a 12VHPWR port.
But you will need 9 x +12V leads for 3 x 8pin PCIE (each 8pin PCIE requires 3 x +12V).
This is why you cannot power a 3x8pin PCIE GPU from a 12VHPWR PSU port. You should use 3 pieces of regular 8pin to 8pin PCIE cables for this type of GPUs.
However, if you only need 2 x 8pin PCIE (for the GPU), you can use 12VHPWR to 2 x 8pin PCIE cables. They will work perfectly fine because a 12VHPWR port provides 6 x +12V, and dual 8pin requires 6 x +12V.
ATX 3.0 PCIe 5.0 600W 12VHPWR 16 Pin to Dual 8 Pin PCIE Power Cable
ATX 3.0 PCIe 5.0 600W 12VHPWR 16 Pin to Dual 8 Pin PCIE Adapter Cable
Updated on: 06/02/2024
Thank you!