Sapphire R9 390 NITRO - Undervoltage problems

[r3lentleSs]

I think something is wrong with my card.
Whenever i even adjust the slider of the voltage in TRIXX.
Screen falls out. I tried to play a game. And the game freezed aswell. Computer is also acting up. Chrome not responding. Apps take Longer to open.

I DDU'ED and installed latest drivers. Did a driver check. Installed ALL older drivers.

Problem still persists. Using 2 different bios.

Is it a GPU problem of maybe mobo ?

This is a used GPU card.

[r3lentleSs]

So this is how it stands now with the card.

I did a fresh OS Windows 10 PRO install build 1709.
And PC normal work, doesn't act up anymore.

Still having GPU problems tho, it seems i can't underclock the card anymore.
Whenever i set the clocks in TRIXX, they just reset to default clocks.
In CCC i can underclock the card to 970, and thats it, the slider is at the end ...
If i alter the memclock in ccc, it reverts back to default clocks aswell.

When i try to set undervoltage before running miner.bat, usually when i get to -100, screen turns black and have to do a hard reset.
When i try to adjust the voltage whilst mining, i can get it to -120. But with default clocks.

I'm trying to get 940/1250 -15% and - 120v for optimal power conumption.

I have tried to play a game, and i'm getting lags, small shocks, and white pixels on occasion. Is my card getting artifacts ?

Anybody suggestions?

[elissa]

try replacing trixx with smth else. I had problems with trixx and a lot of errors and they disappeared when I installed a msi afterburner.

[r3lentleSs]

I've tried MSI afterburner and same things happen, but i can't even undervolt on MSI, its locked.
But if can't underclock on CCC, then there must be something else going on.... i guess

[antantti]

Have you checked in AB properties - general:

-unlock voltage control&monitoring
-extend official overclocking limits
-disable ULPS
-unofficial overclocking mode - without powerplay support

Is your card under warranty? If not then remove cooler and check that vrm, mem, core are properly cooled.