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ROG Matrix Platinum GeForce RTX™ 4090 24GB GDDR6X red light

kheopstr
Level 7

hello everyone;

i have a strange red light blinking on back side of the card. i know there are a lot of people not used regular 12vhpwr cable when pc off red led blinks my problem is not the same.  when i playing games gpu uses over than 450watts  back side red led is begin to blinking. 

i thought it was related  with power supply but i try with three different power supplies.

asus thor 1200 p2 with own 12vhpwr cable  over 400-450 wattages red led blinks

thermaltake thoughpower 1200 watt with 4 pcie cable over 400-450 wattages red led blinks

thermaltake thoughpower 1650 watt gf3 with own single 12vhpwr cable 400-450  red led blinks

with furmark test  (power limit maxed)  it consumes 600watts,  i got no errors,  same situations on demanding games uses 450 watts or more red led starts blinks but i dont have any errors with it. it gets me nervous.  

is that a big issue or not? could anyone please enlighten me?

 

my specs

asus apex z790 (white one) with latest bios

14900ks no overclocked

8000mhz gskill cL40 24*2 48gb ddr5

samsung 980 pro 250gb

samsung 990 pro 2tb

Corsair force mp510 1.75tb

matrix platinum rtx 4090

best regards.

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12 REPLIES 12

Silent_Scone
Super Moderator

Hi @kheopstr 

When you say the back side of the card, where do you mean? Are you able to take a video of the behaviour?

Thanks

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Hi @kheopstr,

Thanks for that.

I can confirm the behaviour isn't normal and the LED is indicating a power detection issue.

In GPU Tweak III, please confirm under Thermal Map & Power Detector+ the current value of each pin when the GPU is underload. (See screenshot)

image001.jpg

 

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

hello again 

as i said under 400watts there is no blinking you can see matrix 1.jpg

 

matrix 2.jpg

 and furmark consumes 500watts red led starts to blink check it below

matrix 3.jpg

Hi @kheopstr 

Can you disconnect the GPU and inspect the power connector on the GPU and the cable for any sign of wear or abnormality? The LED will blink in one of two scenarios:

1. The 12v voltage is lower than 10.8v (Power Detection). The reason may be that the wire is aging or the contact point is abnormal.

2. Among the 12+4pin power supply, one of the pins is abnormal. (Power Detection+)

2a. A single pin exceeds the set current value of 8.33A (no balance)

2b. There is no contact or the pin is abnormally melted.



13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

kheopstr
Level 7

i am sure of that i have this 

"A single pin exceeds the set current value of 8.33A (no balance)"

over 400-450 wattages of use some of  my pins randomly uses more than 9.00A 

and i took some photos of connection parts you can check.. i think connectors seems normalpwrcon1.jpgpwrcon2.jpgpwrcon3.jpgpwrcon4.jpg

kheopstr
Level 7

when red led blinking hwinfo highpwr.jpg

Thanks, I would stop running Furmark for the time being to avoid damage.

Can you ensure the cable is not over tort or bent when inserted? Perhaps when you close the side panel on the chassis. As previously stated, the LED is flashing because pin one is exceeding 8.3A, so there is a power balance issue.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

kheopstr
Level 7

i am sure no tort or bent i am using a big chase. 

Not at this moment but in a week i will check with my tuf rtx 4090... can it be related with motherboard? if tuf one wont the same problem, then should i rma my gpu?