Question My RTX 3080 stopped working (kinda) ?

[LucyVDK]

Hello everyone, at first, i'm sorry for my possibly bad english, it's not my first language.

So, here's my problem
I bought a RTX 3080 back in 2020 (model is MSI GeForce RTX 3080 VENTUS 3X PLUS 10G OC (LHR)
Everything was working perfectly fine, never pushed it to max perfs, always has been limited to 80% via Afterburner
I never used it for mining, or any style of overcloking, never been pushed to its full perfs excepts for benchmarks (3DMark, OCCT etc...)

But 1 year ago, I was playing Black Desert Online (max graphics in 1080p etc, game working fine)
I went afk with the game running for like 30 mins
When i came back my pc was on desktop screen, steam not started yet
Started the game back thinking it just was some power outage that happened when i was out of the house

No problems for like 1 year

Yesterday, my pc turned off when i started Helldivers 2
No problems on main menu, but when I started to play, it instantly turned off my pc
> Worried
Unplugs my pc and check everything
> Everything is fine
I start back the pc, anything working as always
Start Terraria > Nothing happen
Start a random game on steam (3D game) > pc instantly turn off
Restarting the pc and going for a benchmark / errors finding via OCCT, everything is fine, no errors
OCCT starts checking graphic card > pc instantly turn off
> Reinstalled graphic card drivers > nothing changed

Whenever something is using 3D cores, the pc turn off instantly, no logs, no BSOD, nothing, just the pc turning off like it had a power outage
I can only use my pc for anything that doesnt use 3D, everything except 3D things, no 3D games, no 3D modeling software, nothing, only 2D basic things

I'll call for my local computer scientist tomorrow and bring him my graphic card so he can check
What could it be ? i'm scared to get my Cuda cores dead + I don't understand how it could die with the used I had of it (pc has an excellent airflow, never had any sort of overheating, everuthing watercooled except graphic card)

Update, here's my full specs:
NVIDIA system information report created on: 05/29/2025 20:37:32
NVIDIA App version: 11.0.3.241
Operating system: Microsoft Windows 11 Professionnel, Version 10.0.22631
DirectX runtime version: DirectX 12
Driver: Game Ready Driver - 576.52 - Mon May 19, 2025
CPU: Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz
RAM: 16.0 GB
Storage (5): SSD - 931.5 GB+4 more

Graphics card
GPU processor: NVIDIA GeForce RTX 3080
Direct3D feature level: 12_1
CUDA cores: 8704
Graphics clock: 1740 MHz
Resizable bar: No
Memory data rate: 19.00 Gbps
Memory interface: 320-bit
Memory bandwidth: 760.08 GB/s
Total available graphics memory: 18398 MB
Dedicated video memory: 10240 MB GDDR6X
System video memory: 0 MB
Shared system memory: 8158 MB
Video BIOS version: 94.02.71.40.6c
IRQ: Not used
Bus: PCI Express x16 Gen3
Device ID: 10DE 2216 38961462
Part number: G132 0031

Display (2): XG2401 SERIES
Resolution: 1920 x 1080 (recommended)
Refresh rate: 144 Hz
Desktop color depth: Highest (32-bit)
HDCP: Supported

Display (1): XG2405
Resolution: 1920 x 1080 (recommended)
Refresh rate: 144 Hz
Desktop color depth: Highest (32-bit)
HDCP: Supported

Display (3): XP-PEN 22Pro
Resolution: 1920 x 1080 (native)
Refresh rate: 60 Hz
Desktop color depth: Highest (32-bit)
HDCP: Supported

CPU Cooler: 240mm AIO (sorry i don't remember the model)

Motherboard: Asus ROG Maximus IX Formula

RAM: X2 - Crucial Ballistix Sport LT BLS2K8G4D240FSC 2400 MHz, DDR4 (A1 B1)

SSD/HDD:
M.2: Samsung 970 Evo 2 - 1To
SSD 1: WD Blue - 1To (system)
SSD2: WD Blue - 1To
HDD1: Seagate 3.5" Barracuda - 2To (ST2000DM008)
HDD2: Seagate 3.5" Barracuda - 2To (ST2000DM008)
External HDD: HGST Ultrastar HC320 - 8To

PSU: Cooler Master MWE 850 Gold V2 (5 Yo)

Chassis: Thermaltake Core P5 TG V2 Black Edition

BIOS: American Megatrends Inc. 1501, 07/13/2021

 

[Lutfij]

Welcome to the forums, newcomer!

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

 

[thestryker]

There's really just two things I'd suggest doing up front. Make sure the video card is securely in the PCIe slot and disconnect the power cables at video card and PSU end and then reconnect them.

There is a possibility of thermal paste/pad issue, but I wouldn't expect that to be an immediate power down.

 

[skitz9417]

when it reboots do u get a blue screen of death ?

 

[LucyVDK]

There's really just two things I'd suggest doing up front. Make sure the video card is securely in the PCIe slot and disconnect the power cables at video card and PSU end and then reconnect them.

There is a possibility of thermal paste/pad issue, but I wouldn't expect that to be an immediate power down.

I already tried using the second PCIe slot but I had the same problem, the graphic card is never overheating, always at max 65-70°C even when used

 

[LucyVDK]

when it reboots do u get a blue screen of death ?

I never get any BSOD, no error log, nothing, pc just restarts normally like nothing happened