Hello, I tried to run 3DMark on my PC but it shut off 3 times in a row mid benchmark. I did not check to see at what point during the benchmark it fails, but it shuts off (seems like power is cut) then boots up again. I am thinking the PSU is bottlenecking my system, but I am not sure. This is my first PC build and I am very new to this. Any and all help is greatly appreciated
 
PC Specs:
CPU: Intel i7 - 8700K
GPU: EVGA 2080 Ti FTW Hybrid
Cooler: EVGA CLC 280
Motherboard: EVGA Z390 FTW
RAM: 2x8 GB G.SKILL TridentZ RGB
SSD: Samsung 500GB 970 Evo
Storage: 2TB Seagate BarraCuda
PSU: EVGA 750 GQ
Case: EVGA DG-77 Black

When you say "Are you using at 2 Separate PCIe Power Cables from your Power Supply to your Graphics Card? This is a Must regardless of what others may tell you." Do you mean I need 2 separate 8 pin connectors going from the PSU to the GPU? Right now I have one cable that is connected by a single 8 pin to the PSU and splits off into two 8 pin connectors, both going to the GPU.

I wouldn't call it a bottle neck, EVGA recommends a 550w psu with your current set, 650w if overclocking. I'm not sure how much headroom their power meter gives you but a 750w should be fine. Usually, random restarts under load is an unstable power supply so if it continues after you try 2 separate cables, then I would suspect your PSU is bad. 
 
Test with another PSU if you have one available and you will probably have to set up an RMA. Remember, with computers, it can be anything and everything!  

bcavnaugh
EVGA GeForce RTX 2080 TI FTW3 ULTRA HYBRID GAMING, 11G-P4-2484-KR, 11GB GDDR6, RGB LED Logo & iCX2 Technology - 9 Thermal Sensors

Requirements

 

• Minimum of a 650 Watt power supply.
• Two available 8-pin or 6+2pin PCIe power dongles
• Total Power Draw : 250 Watts
  

They need to update their Power Meter then, it says a 550w PSU is sufficient for a 2080 Ti with his current gear or 650w if overclocked. Hopefully, using 2 cables will fix his issue like you suggested. 
 
 

EVGATech_LeeM

AngryAce

bcavnaugh

Requirements

 

• Minimum of a 650 Watt power supply.
• Two available 8-pin or 6+2pin PCIe power dongles
• Total Power Draw : 250 Watts
  

They need to update their Power Meter then, it says a 550w PSU is sufficient for a 2080 Ti with his current gear or 650w if overclocked. Hopefully, using 2 cables will fix his issue like you suggested. 

Both values are correct, even if the Power Meter recommends a 550W.  NVIDIA recommends a 650W minimum for an RTX 2080 Ti, which is what we list.  The Total Power Draw is 250W, unless you're overclocking. 
 
Either way a 750W power supply should be sufficient, unless there's an issue.

Hmm I changed out the cables and its still shutting down. I dont have a different PSU to try, but that will be my next step to figure it out. Thank you so much for helping me out with this, everyone!