I am trying to set up a 4x1080ti’s rig with one EVGA 1200w power supply. I am posting here just to make sure what I’ll be doing is safe. After some googling, many people also have the same setup as long as the 1080ti’s are undervolted to around 70-80% (which also what I’m planning to do).
Here are the relevant equipments:
- 4x EVGA 1080ti SC (requires 8 + 6 pin)
- 4x risers with molex, 6-pin, and SATA connections (won’t be using the SATA)
- 1x EVGA 1200 P2 power supply
The PSU has the following relevant ports:
- 6x VGA
- 2x PERIF
The following relevant cables are included:
- 4x 8(6+2)-pin PCIe cables
- 2x 6-pin + 8(6+2)-pin PCIe cables
- 1x 3 Molex cable
- 1x 2 Molex cable
What I’m thinking of doing is the following:
- Plug in the 4x 8pin PCIe cables to the 8-pin power needed by each 1080ti. This uses 4 VGA ports. 1 cable → 1 GPU
- Plug in the 2x 6+8 PCIe split cables to the 6-pin power needed by each 1080ti. This uses the remaining 2 VGA ports. 1 cable → 2 GPU
- Power up the 4x risers using the 2 Molex cables. 2 risers per 1 Molex cable.
- The above will be done one by one per GPU, and I will install the GPU as well as undervolting it and checking the power draw at the wall before moving on to the next one.
My questions are:
- Is the plan above safe to do? Any suggestions?
- What if I had 4x 1080ti’s that each needs an 8-pin+8-pin? Would it be possible to fit them all in one EVGA 1200w?
Thanks in advance!