hashcat
advanced password recovery

Hi, so I'm wondering whether anyone knows why 1 of my 1080 Ti's is performing at simillar speeds to my 1080.

Current rig:
1 x 1080
2 x 1080ti

All on risers powered by PCI (they're all at Bus: 1) - which I heard barely impacts hashcat speed.
32GB RAM, no CPU bottleneck etc.

Example (running KeePass with -O -w4)

Speed.#1.........:    11836 H/s (393.88ms) @ Accel:64 Loops:512 Thr:1024 Vec:1
Speed.#2.........:    9257 H/s (254.27ms) @ Accel:64 Loops:256 Thr:1024 Vec:1
Speed.#3.........:    8528 H/s (393.15ms) @ Accel:64 Loops:512 Thr:1024 Vec:1

Hardware.Mon.#1..: Temp: 68c Fan: 46% Util:100% Core:1898MHz Mem:5005MHz Bus:1
Hardware.Mon.#2..: Temp: 65c Fan: 37% Util:100% Core:1898MHz Mem:5005MHz Bus:1
Hardware.Mon.#3..: Temp: 65c Fan: 47% Util:100% Core:1898MHz Mem:4513MHz Bus:1


As seen, the GPU falling below standards is: Hardware.Mon.#2
I check in NVIDIA-SMI and it seems to be receiving:

|  2  GeForce GTX 108... WDDM  | 00000000:06:00.0  On |                  N/A |
| 38%  65C    P2  149W / 250W |  2131MiB / 11264MiB |    100%      Default |
|                              |                      |                  N/A |
+-------------------------------+----------------------+----------------------+


Whereas the 1080ti which is working great with normal speeds is receiving:
|  1  GeForce GTX 108... WDDM  | 00000000:05:00.0 Off |                  N/A |
| 47%  68C    P2  193W / 250W |  1718MiB / 11264MiB |    100%      Default |
|                              |                      |                  N/A |
+-------------------------------+----------------------+----------------------+


Is the GPU wattage draw causing the low speeds as there's for some reason a 44watt reduction?

It's also worth noting:
Sometimes when trying other hash types, the "GPU falling below standards" initially starts for the first couple minutes performing normally, to near idential speeds as my good 1080 ti. But then there's a low speed drop off.
I've also tried various Hashcat versions and that didn't fix any problems.

And finally to add;
D:\hashcat>hashcat64.exe -m 0 -O -w 4 -b
hashcat (v6.0.0) starting in benchmark mode...

CUDA API (CUDA 11.1)
====================
* Device #1: GeForce GTX 1080 Ti, 9326/11264 MB, 28MCU
* Device #2: GeForce GTX 1080 Ti, 9326/11264 MB, 28MCU
* Device #3: GeForce GTX 1080, 6769/8192 MB, 20MCU

OpenCL API (OpenCL 1.2 CUDA 11.1.114) - Platform #1 [NVIDIA Corporation]
========================================================================
* Device #4: GeForce GTX 1080 Ti, skipped
* Device #5: GeForce GTX 1080 Ti, skipped
* Device #6: GeForce GTX 1080, skipped

Benchmark relevant options:
===========================
* --optimized-kernel-enable
* --workload-profile=4

Hashmode: 0 - MD5

Speed.#1.........: 36112.4 MH/s (51.77ms) @ Accel:64 Loops:1024 Thr:1024 Vec:8
Speed.#2.........: 28015.3 MH/s (66.62ms) @ Accel:64 Loops:1024 Thr:1024 Vec:8
Speed.#3.........: 26671.5 MH/s (50.06ms) @ Accel:64 Loops:1024 Thr:1024 Vec:8
Speed.#*.........: 90799.1 MH/s


 
Any help/advice/tips is greatly appreciated.

Have you tried swapping risers of the 1080 Ti's?

Two words: thermal throttling. Where is that second 1080ti? Between the other 2 cards?

(12-26-2020, 09:37 PM)soxrok2212 Wrote: Two words: thermal throttling. Where is that second 1080ti? Between the other 2 cards?

The temps are less than 70c though? And yeah it's between the 2 other cards.

(12-26-2020, 06:29 PM)parano1d Wrote: Have you tried swapping risers of the 1080 Ti's?

Yep don't think it's a riser issue.

Temps are probably less than 70°C because of thermal throttling. If you can try to place the card somewhere else that between those other two cards for a test.

(12-27-2020, 12:05 PM)undeath Wrote: Temps are probably less than 70°C because of thermal throttling. If you can try to place the card somewhere else that between those other two cards for a test.

I have switched the riser, I have placed the card on it's own on a 1200w Corsair Platinum PSU.

I have placed the card furthest away possible from the 2 other cards on my rig, and the issue remains.

Example of the awful speeds I'm receiving right now.:
Session..........: hashcat
Status...........: Running
Hash.Name........: vBulletin >= v3.8.5
Hash.Target......: d:/Hashcat/hash.txt
Time.Started.....: Sun Dec 27 17:08:48 2020 (1 min, 26 secs)
Time.Estimated...: Tue Dec 29 03:52:20 2020 (1 day, 10 hours)
Guess.Mask.......: ?l?l?l?l?l?l?d?d?d?d [10]
Guess.Queue......: 1/1 (100.00%)
Speed.#1.........:  6315.8 MH/s (283.58ms) @ Accel:64 Loops:1024 Thr:1024 Vec:1
Speed.#2.........:  2801.4 MH/s (288.74ms) @ Accel:64 Loops:512 Thr:1024 Vec:1
Speed.#3.........:  3707.7 MH/s (346.00ms) @ Accel:64 Loops:1024 Thr:1024 Vec:1
Speed.#*.........: 12824.9 MH/s
Recovered........: 0/519 (0.00%) Digests, 0/519 (0.00%) Salts
Progress.........: 1103290695680/1603272877440000 (0.07%)
Rejected.........: 0/1103290695680 (0.00%)
Restore.Point....: 0/175760000 (0.00%)
Restore.Sub.#1...: Salt:16 Amplifier:15360-16384 Iteration:0-1024
Restore.Sub.#2...: Salt:7 Amplifier:8192-8704 Iteration:0-512
Restore.Sub.#3...: Salt:13 Amplifier:14336-15360 Iteration:0-1024
Candidates.#1....: owqera1234 -> biilkk7889
Candidates.#2....: crrhnq4669 -> vfduou8434
Candidates.#3....: rywrkk7889 -> vkvytx8100
Hardware.Mon.#1..: Temp: 74c Fan: 55% Util:100% Core:1733MHz Mem:5005MHz Bus:1
Hardware.Mon.#2..: Temp: 70c Fan: 46% Util:100% Core:1898MHz Mem:5005MHz Bus:1
Hardware.Mon.#3..: Temp: 72c Fan: 53% Util:100% Core:1873MHz Mem:4513MHz Bus:1

I am truly, at a loss of ideas..

why don't you run it when it's the only one connected?

(12-27-2020, 09:21 PM)dismal Wrote: why don't you run it when it's the only one connected?

Because I want to run a multiple GPU rig.

(12-28-2020, 06:21 PM)CursedGPU10000 Wrote:

(12-27-2020, 09:21 PM)dismal Wrote: why don't you run it when it's the only one connected?

Because I want to run a multiple GPU rig.

That is very nice, but I proposed to run it solo for a test.