WDDMよりも安定するんじゃね？と言われて、ドライバーを最新化するついでにMCDMモードなるものを設定してみた。
…かなり安定した。高負荷時にDPC_WATCHDOG_TIMEOUTを食らうことがなくなった気がする。
PS C:\> nvidia-smi
Fri Jul 3 13:29:03 2026
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 582.70 Driver Version: 582.70 CUDA Version: 13.0 |
+-----------------------------------------+------------------------+----------------------+
| GPU Name Driver-Model | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|=========================================+========================+======================|
| 0 Quadro P6000 MCDM | 00000000:17:00.0 Off | Off |
| 31% 67C P0 130W / 250W | 22841MiB / 24576MiB | 59% Default |
| | | N/A |
+-----------------------------------------+------------------------+----------------------+
| 1 Quadro P6000 MCDM | 00000000:65:00.0 Off | Off |
| 26% 59C P0 70W / 250W | 22788MiB / 24576MiB | 0% Default |
| | | N/A |
+-----------------------------------------+------------------------+----------------------+
| 2 Quadro P620 WDDM | 00000000:B3:00.0 On | N/A |
| 34% 42C P8 N/A / N/A | 1147MiB / 2048MiB | 6% Default |
| | | N/A |
+-----------------------------------------+------------------------+----------------------+
PS C:\> nvidia-smi -q
==============NVSMI LOG==============
Timestamp : Fri Jul 3 13:30:45 2026
Driver Version : 582.70
CUDA Version : 13.0
Attached GPUs : 3
GPU 00000000:17:00.0
Product Name : Quadro P6000
Product Brand : Quadro
Product Architecture : Pascal
Display Mode : Requested functionality has been deprecated
Display Attached : No
Display Active : Disabled
Persistence Mode : N/A
Addressing Mode : N/A
MIG Mode
Current : N/A
Pending : N/A
Accounting Mode : Disabled
Accounting Mode Buffer Size : 4000
Driver Model
Current : MCDM
Pending : MCDMPS C:> nvidia-smi -g 0 -dm 2
PS C:> nvidia-smi -g 1 -dm 2