I speak from personal experience.
DON'T do this.
we have an 8 GPU mining rig and we were using 2 power supply.
usually we make sure that the PSU powering the PCIE of the GPU also powers its risers.
but we messed up on one GPU and it's riser ended up being powered up by the second PSU.
what happened was the PSU powering the PCIE of the GPU died. so the only place the GPU can draw power
was from the riser. good thing we noticed quickly because when we checked the riser was REALLY HOT.
if it was left uncheck it could have started a fire. so please don't do this.
DON'T do this.
we have an 8 GPU mining rig and we were using 2 power supply.
usually we make sure that the PSU powering the PCIE of the GPU also powers its risers.
but we messed up on one GPU and it's riser ended up being powered up by the second PSU.
what happened was the PSU powering the PCIE of the GPU died. so the only place the GPU can draw power
was from the riser. good thing we noticed quickly because when we checked the riser was REALLY HOT.
if it was left uncheck it could have started a fire. so please don't do this.