Hello mates

Red dragon cards are not said to have really good fans, so i had to replace them since one was not working.

I also changed thermal pads. Because original fans are really expensive and hard to get, i went for "compatible" ones. The Compatible one lasted less than 2 weeks. I still can't figure what was wrong with it.

Well, for sometime i just mined with this "only one fan brand new" fan and pointed a case fan 120mm to the fan not working to help cool the card but something weird was happening. The card could not hold the numbers I placed on MSI Afterburner. My settings are 850mv/1350mhz core/1820mem 85% fan.
Phoenix miner was used. the card underclocked itself harder than the numbers placed on MSI ,so they went for 750mv/1000mhz ish/1800/85% fan.
I thought this reduction was due to high temps (remember, only 1 out of 2 fans were working). Card was at 80ºC

Today i received new fans. So mounted the card, and went to mining as normal.
But the card still underclocks to 750mv/1000mhz ish/1820mhz and 85%fan.

Temps are OK (not more than 70 for core).


The issue comes with phoenix miner. When i place the numbers on MSI, this card that begins at stock 2000mhz/1200mv/1750/auto , once i put the numbers of my other cards on MSI, this card automatically goes to the 750mv numbers.

Tried changing the riser, the cable, the adapter, DDUU+ new drivers, older version of phoenix (using 6.2 but i was using 5.9 aswell), tried new power cables on other PCIE slot on the PSU and new pcie slot.  Drivers were installed only. Nothing else. Updated also MSI from 4.6.3 to latest version.

no luck, so i put it on my testbench. The card could run perfectly with Valley Benchmark at stock settings for 20 minutes no issue and also i could apply the undervolt settings ( 1350mhz/850mv/1820mhz mem/85% fan and run the benchmark with no issues with the card holding the desired values.
But the moment i begin mining, even on the bench, it would gradually go down from stock numbers to 750mv/1000ish mhz/ in a matter of 30 minutes. Phoenix miner , btw.

it's as if the card was being affected by autotunning in a weird way.

The weird thing is that in this rig i have more RX 5700XT but those are not affected. It doesn't matter the order in which i begin putting the settings on MSI for the other cards. Eventually this card will go to the 750mv values reducing its 56MH to 46MH at most since core should stay above 1280mhz to hold 56MH on almost all RX 5700XT

I also tried +20% power. nothing. Also adding voltage doesn't help. I managed to increase voltage to 850mv but the core locks at around 1100mhz on the core ,both settings on MSI. And if you press the reset button on MSI afterburner, the card once it goes to 750mv, it will not return to stock settings. It locks there.

Also tried uninstalling the card several times (in case there was some kind of log telling the card to hard-undervolt. Still no solution. I even disconected the card from the rig, turn it on, mine with it like 30 min, and then turn it off, put the card again and run the miner. Nothing. It continuously happening the same. 

The only solution by now is to switch to TRM and give it a try.

In any case. Someone has any idea of what can be happening??? Thanks in advance.