Hi folks,

I have a small rig with 4 cards running:

- ryzen 1800x
- AX370 Gaming K7 Mainboard
- 1x 3090
- 1x 3080
- 1x 1080ti
- 1x 3070

two cards are sitting in the pcie x16 slots available on the board. two cards are connected with riser. I used these risers for months before, they should not be faulty. NVM I already switched risers meanwhile and that doesnt fix the problem:

the 3080 mined for two weeks now with memclock +1000, PL 70% and to make sure the VRAM does not throttle FAN set to 85% which resulted in tjunction of max 98°. this is bad

however, I installed the 4th card 3070 yesterday and since then I had a bluescreen and after that the 3080 shows some strange behaviour:

after reboot it shows u normal. when starting nicehash software everything looks fine. as soon as I start mining the stats like temp, fan speed, ec dissappears and so does the card in nicehash GUI.

In HWInfo I can also see several stats of the card dissappear. the card still does show up in device manager of windows. I tried to mine with the card in a complete new build and it worked. so I dont feel like the card is dead. unfortunately in my main rig i still cant get it to work again.

I tried the following:
- reinstall nvidia driver
- reset bios to defaults
- set above 4g decoding: enable and PCIe Gen: 2 @BIOS (had it working with defaults)
- swap risers, problem follows the card
- usefactory clocks by setting up afterburner once, save and reboot without afterburner loading.

anybody has a tip for me? I'm close to RMAing the card but since it is booting and surviving benchmarks I dont even know what to complain about, except mining which is not what i will complain about obv.

best regards