Hello I have a Gainward Nvidia RTX 2070 with power issues.
It draws less power than it should and it gets only 9 MH/s when mining ETH with DaggerHashimoto instead of 40+.
I tried different miners, different drivers, different risers, different slots and nothing changes. This happens with stock settings (no OC).

This is the problem: this gpu has only one 8-pin PCIE power port, while GPU-Z says there is another 6-pin PCIE port, that actually does NOT exist.
With several tests and a Watt-meter at the wall I discovered that the ACTUAL power drawn by gpu is the sum of:
1) power that flows through 8-pin port
2) power that flows through riser
Both GPU-Z and any miner show a higher drawn power, because they consider a 3rd component coming from 6-pin PCIE port, that, as written before, does NOT exist. This higher power is only virtual, since Watt-meter at the wall shows a lower power. Of course I took into consideration idle power and system power while doing the math.

At the moment I solved this way, but it's not that great. I set OC with MSI Afterburner at 114% power limit, giving the card a decent power and a decent hashrate (38MH/s).

My idea is that this gpu has a wrong firmware, that makes the whole PC think it has 8+6 pin power ports. Could that be the case? If that's true how can I solve? All my other 6 gpus work great.

Some details of my rig for you to know:
- OS: Windows 10
- Miner: NBMiner, T-Rex and others
- PSU: Corsair AX1200i + Corsair HX1200
- Biostar tb250-btc pro

Thanks in advance for your help and patience reading this huge text.