Broken PSU?

[Pina_Koala]

PCPartPicker Part List: https://pcpartpicker.com/list/n9wdht

CPU: Intel Core i7-10700K 3.8 GHz 8-Core Processor  ($259.99 @ Amazon) 
CPU Cooler: Scythe FUMA 2 51.17 CFM CPU Cooler  ($59.99 @ Amazon) 
Motherboard: MSI Z490-A PRO ATX LGA1200 Motherboard  ($179.99 @ Best Buy) 
Memory: Crucial Ballistix 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory  ($87.99 @ Adorama) 
Storage: Western Digital Blue SN550 1 TB M.2-2280 NVME Solid State Drive  ($104.99 @ Lenovo) 
Video Card: EVGA GeForce GTX 980 4 GB Superclocked ACX 2.0 Video Card 
Case: Phanteks Eclipse P400A Digital ATX Mid Tower Case  ($89.99 @ Newegg) 
Power Supply: EVGA SuperNOVA GA 750 W 80+ Gold Certified Fully Modular ATX Power Supply  ($114.99 @ Amazon) 
Case Fan: Phanteks PH-F120SK 50 CFM 120 mm Fan  ($13.99 @ Amazon) 
Case Fan: Phanteks PH-F120SK 50 CFM 120 mm Fan  ($13.99 @ Amazon) 
Monitor: Asus VG248QG 24.0" 1920x1080 165 Hz Monitor  ($190.99 @ B&H) 
Total: $1116.90
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2021-06-21 17:00 EDT-0400

 

This is my first build after gaming on a laptop for the last 2 years. I built this pc today, and connected all the cables correctly. But when minute of running. The gpu fans would turn off after 20ish seconds and the back fan will start spinning if I give it a little. I got the evga supernova psu on sale for $100, and my first thought is if it is defective. I was going to try the paperclip test with the green wire but all the 24 wires are black. I hope this video works:

 

Video.mov

[Mishroh]

8 minutes ago, Pina_Koala said:

PCPartPicker Part List: https://pcpartpicker.com/list/n9wdht

CPU: Intel Core i7-10700K 3.8 GHz 8-Core Processor  ($259.99 @ Amazon) 
CPU Cooler: Scythe FUMA 2 51.17 CFM CPU Cooler  ($59.99 @ Amazon) 
Motherboard: MSI Z490-A PRO ATX LGA1200 Motherboard  ($179.99 @ Best Buy) 
Memory: Crucial Ballistix 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory  ($87.99 @ Adorama) 
Storage: Western Digital Blue SN550 1 TB M.2-2280 NVME Solid State Drive  ($104.99 @ Lenovo) 
Video Card: EVGA GeForce GTX 980 4 GB Superclocked ACX 2.0 Video Card 
Case: Phanteks Eclipse P400A Digital ATX Mid Tower Case  ($89.99 @ Newegg) 
Power Supply: EVGA SuperNOVA GA 750 W 80+ Gold Certified Fully Modular ATX Power Supply  ($114.99 @ Amazon) 
Case Fan: Phanteks PH-F120SK 50 CFM 120 mm Fan  ($13.99 @ Amazon) 
Case Fan: Phanteks PH-F120SK 50 CFM 120 mm Fan  ($13.99 @ Amazon) 
Monitor: Asus VG248QG 24.0" 1920x1080 165 Hz Monitor  ($190.99 @ B&H) 
Total: $1116.90
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2021-06-21 17:00 EDT-0400

 

This is my first build after gaming on a laptop for the last 2 years. I built this pc today, and connected all the cables correctly. But when minute of running. The gpu fans would turn off after 20ish seconds and the back fan will start spinning if I give it a little. I got the evga supernova psu on sale for $100, and my first thought is if it is defective. I was going to try the paperclip test with the green wire but all the 24 wires are black. I hope this video works:

 

Video.mov 7.18 MB · 1 download

So it seems from your video that the issue could be 2 things. Maybe others who see this can add to this. But from what I see, your cpu and cpu cooler have power until the shut off and all the other parts have some sort of current going to them. So it's either bad cable seating (take em out and plug them back in) or you need to RMA the psu. I have your power supply and I've never seen this issue on my end. So try reseating your cables and check your surge protector and if everything is seated correctly, RMA the power supply and get a new one.

 

Tell me how it goes!