12v for Gfx Card at over 13.5v on GPU-Z! (Urgent help needed)

[onurh]

Hi all,

My gtx 980, which didn't see much use stopped functioning recently, windows starting giving me error 43 and programs wouldn't recognise the card. I assumed that it was just the end of the gfx cards life, so I went and purchased a temporary card just until nvidia release their new cards. I purchased this HD 7870 (PowerColor PCS+ Myst), which was described as perfect conditon, without having much use and was at a very good price. The seller had a very high amount of feedback, all positive.

Everything was fine, until I started noticing that the card would heat up to about 60 degrees celcius on idle. I've taken a screenshot of the GPUz readings and it seems that the 12v is incredibly high, it sits at 13.5v. Not sure what the norm for VDDC is, but I've highlighted that too. I've also included the 12v reading shown on the motherboard, which seems to vary from 12.05-12.2, which seems fine.


What could be causing this problem? Is it just a coincidence that, I just lost my previous card and this one is faulty too? Or is there an issue with the PSU?


Specs of my PC:

-Ryzen 3 1200 (3.7ghz OC @ 1.275v)
-Ripjaws V DDR4 (2400mhz OC @1.25v)
-MSI B350m Mortar
-EVGA 600w 80+ Rated (White)
-PowerColor HD 7870 PCS+ Myst


(All components were purchased as new from Amazon about 6 Months ago, excluding the gfx card)


Sorry for possibly writing too much, I just could really use a fast responce, I don't want to possibly fry another gfx card.

Thanks in advance!

 

[zyh1987]

do you have a digital multi meter? you can measure the voltage off the 12v from the 6+2pin and see if the voltage is indeed that high. if that's the case, i would say RMA your psu.

 

[TJ Hooker]

It would seem like one of those sensors must be wrong, can't think of anyway the 12V supply on the graphics card could end up higher than the 12 rail on the PSU.

 

[onurh]

Thanks a lot guys! Both answers helped me a lot. I tested the 6+2pins and the volt meter gave a reading of 12.2v, which seems to be healthy. So it must just be the sensor giving a false reading, which i'm assuming just needs to be ignored.

 

[zyh1987]

then the issue will be was the faulty reading used in anyways, and triggers card's internal protection.

if that's the case, then it is very hard to fix.

 

[onurh]

Would a faulty sensor cause an issue?

 

[zyh1987]

if the value is used for any control logic as input, it will cause issue.

 

[onurh]

Is there anything that usually does? Gaming seems to be okay so far

 

[zyh1987]

if that's the case, i guess you shouldn't be worry too much about it.

just make create a more aggressive fan profile to keep your gfx card nice and cool.

 

[TJ Hooker]

I don't think there'll be any issue. The graphics card regulates the 12V input to like 1-1.5 V for the GPU, and it's that lower voltage that is used for any feedback and monitoring.

 

[onurh]

Thanks a lot once again for your assistance guys.