Not running on the GPU
Hi all!

I am trying to run hashcat on my Nvidia GPU but not having any luck so far.
Here is the command I'm using:
hashcat -m 12700 -a 3 -w 2 --hwmon-disable -d 1 wallet.hash ?a?a?a?a?a?a

And this is the info I'm getting:
hashcat (v6.1.1) starting...

* Device #3: Unstable OpenCL driver detected!

This OpenCL driver has been marked as likely to fail kernel compilation or to produce false negatives.
You can use --force to override this, but do not report related errors.

* Device #1: GeForce GTX 1070 with Max-Q Design, 6788/8192 MB, 16MCU

OpenCL API (OpenCL 1.2 CUDA 11.1.70) - Platform #1 [NVIDIA Corporation]
* Device #2: GeForce GTX 1070 with Max-Q Design, skipped

OpenCL API (OpenCL 2.1 ) - Platform #2 [Intel(R) Corporation]
* Device #3: Intel(R) UHD Graphics 630, skipped

Minimum password length supported by kernel: 0
Maximum password length supported by kernel: 256

Hashes: 1 digests; 1 unique digests, 1 unique salts
Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13 rotates

Applicable optimizers applied:
* Zero-Byte
* Single-Hash
* Single-Salt
* Brute-Force
* Slow-Hash-SIMD-LOOP

Watchdog: Hardware monitoring interface not found on your system.
Watchdog: Temperature abort trigger disabled.

Host memory required for this attack: 345 MB

[s]tatus [p]ause [b]ypass [c]heckpoint [q]uit =>

Session..........: hashcat
Status...........: Running
Hash.Name........: Blockchain, My Wallet
Hash.Target......: $blockchain$704$47424a34772f6c7a6e513378495a4537574...506d54
Time.Started.....: Wed Jan 06 21:48:27 2021 (1 min, 9 secs)
Time.Estimated...: Thu Jan 07 09:16:51 2021 (11 hours, 27 mins)
Guess.Mask.......: ?a?a?a?a?a?a [6]
Guess.Queue......: 1/1 (100.00%)
Speed.#1.........: 17797.0 kH/s (116.26ms) @ Accel:64 Loops:9 Thr:1024 Vec:1
Recovered........: 0/1 (0.00%) Digests
Progress.........: 1229979648/735091890625 (0.17%)
Rejected.........: 0/1229979648 (0.00%)
Restore.Point....: 12582912/7737809375 (0.16%)
Restore.Sub.#1...: Salt:0 Amplifier:33-34 Iteration:0-9
Candidates.#1....: zXBzba -> zj&;gi

Where I want to run on my GeForce GTX 1070.

I tried to run with --force, but it either only runs on Intel(R) UHD Graphics 630 (if I don't specify a device) or on CPU if I specify "-d 1".

I'm also on Windows 10 if that helps anything.

What can I do to get it running on the GeForce GPU?

Thanks so much in advance!
So it seems like running on device #2 instead of #1 gives some result on the GPU.
However, it's only running on 0.1% efficiency, even with "-w 4".

Is there any way to debug why it's using so little resources?

(I read somewhere that Windows Task Manager sometimes is misleading in the values it gives, so for reference, it's running at about 11000 kH/s at the moment, is it just the reading that is wrong perhaps?)
according to the output you posted above it is using this device:
Device #1: GeForce GTX 1070 with Max-Q Design, 6788/8192 MB, 16MCU

Don't use the task manager to assess gpu resource usage.