Question GPU worked when I got it, stopped working then resumed for 1 day then died again


Jun 21, 2017
Past thread:

After that post, I planned to bring it to repair. Because the MSI repair location is under lockdown, so I have to wait.

Yesterday, I was thinking to give it a shot again. Reinstalled my 3070ti, and it worked! And I played game and no problem, shut down computer. Then today afternoon, the problem occur again, MSI motherboard EZdebug light is on the GPU.

Why the GPU works again after a week of not using it? Is it something wrong with my build? Not enough power?

CPU: AMD Ryzen 7 5800X 3.8 GHz 8-Core Processor
CPU Cooler: Noctua NH-D15 CHROMAX.BLACK 82.52 CFM CPU Cooler
Motherboard: MSI MAG X570 TOMAHAWK WIFI ATX AM4 Motherboard
Memory: Corsair Vengeance LPX 16 GB (2 x 8 GB) DDR4-3600 CL18 Memory
Storage: ADATA XPG SX8200 Pro 1 TB M.2-2280 NVME Solid State Drive
Video Card: MSI GeForce RTX 3070 Ti 8 GB GAMING X TRIO Video Card
Case: Lian Li Lancool II Mesh ATX Mid Tower Case
Power Supply: SeaSonic FOCUS 750 W 80+ Gold Certified Fully Modular ATX Power Supply

I don't understand what's the problem, anyone have any idea ?