# Running H100 GPUs

**URL:** <https://pyfr.discourse.group/t/running-h100-gpus/1357>\
**Category:** Uncategorised\
**Created:** [18 April 2026 20:21 UTC](https://pyfr.discourse.group/t/running-h100-gpus/1357 "2026-04-18T20:21:04Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![raj-brown](https://yyz2.discourse-cdn.com/free1/user_avatar/pyfr.discourse.group/raj-brown/32/675_2.png) [@raj-brown](https://pyfr.discourse.group/u/raj-brown)\
**Post date:** [18 April 2026 20:21 UTC](https://pyfr.discourse.group/t/running-h100-gpus/1357/1 "2026-04-18T20:21:04Z")

</div>

Dear All-

I was trying to run PyFR on H100 GPU and It throws following error but I was able to run it with out any problem on 3090 the ampere architecture. I will appreciate if you have any suggestions.

Thanks!

File “/oscar/data/gk/kshukla1/NeuroNSE\_DATA\_JHTDB/PYFR/pyfr-venv/lib/python3.11/site-packages/pyfr/backends/base/backend.py”, line 207, in kernel

```
kern = kern_meth(\*args, \*\*kwargs)

       ^^^^^^^^^^^^^^^^^^^^^^^^^^

```

File “/oscar/data/gk/kshukla1/NeuroNSE\_DATA\_JHTDB/PYFR/pyfr-venv/lib/python3.11/site-packages/pyfr/backends/cuda/gimmik.py”, line 75, in mul

```
kern = self.\_build_kernel(kname, src, 'PP')

       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

```

File “/oscar/data/gk/kshukla1/NeuroNSE\_DATA\_JHTDB/PYFR/pyfr-venv/lib/python3.11/site-packages/pyfr/cache.py”, line 44, in newmeth

```
res = cache\[key\] = meth(self, \*args, \*\*kwargs)

                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^

```

File “/oscar/data/gk/kshukla1/NeuroNSE\_DATA\_JHTDB/PYFR/pyfr-venv/lib/python3.11/site-packages/pyfr/backends/cuda/provider.py”, line 41, in \_build\_kernel

```
mod = CUDACompilerModule(self.backend, src)

      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

```

File “/oscar/data/gk/kshukla1/NeuroNSE\_DATA\_JHTDB/PYFR/pyfr-venv/lib/python3.11/site-packages/pyfr/backends/cuda/compiler.py”, line 145, in \__init_\_

```
cucode = backend.compiler.build('kernel', src, flags)

         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

```

File “/oscar/data/gk/kshukla1/NeuroNSE\_DATA\_JHTDB/PYFR/pyfr-venv/lib/python3.11/site-packages/pyfr/backends/cuda/compiler.py”, line 120, in build

```
code = self.nvrtc.compile(name, src, flags)

       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

```

File “/oscar/data/gk/kshukla1/NeuroNSE\_DATA\_JHTDB/PYFR/pyfr-venv/lib/python3.11/site-packages/pyfr/backends/cuda/compiler.py”, line 82, in compile

```
raise RuntimeError(log.value.decode())

```

RuntimeError: nvrtc: error: invalid value for --gpu-architecture (-arch)

---

<div class="post-metadata">

**Author:** ![fdw](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@fdw](https://pyfr.discourse.group/u/fdw)\
**Post date:** [19 April 2026 00:49 UTC](https://pyfr.discourse.group/t/running-h100-gpus/1357/2 "2026-04-19T00:49:02Z")

</div>

Can you please confirm your CUDA version? It is likely your installation has an out-of-date version of nvrtc which is causing this issue.

Regards, Freddie.

---

<div class="post-metadata">

**Author:** ![raj-brown](https://yyz2.discourse-cdn.com/free1/user_avatar/pyfr.discourse.group/raj-brown/32/675_2.png) [@raj-brown](https://pyfr.discourse.group/u/raj-brown)\
**Post date:** [22 April 2026 05:48 UTC](https://pyfr.discourse.group/t/running-h100-gpus/1357/3 "2026-04-22T05:48:36Z")

</div>

Thanks @fdw It is cuda12.6

---

<div class="post-metadata">

**Author:** ![fdw](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@fdw](https://pyfr.discourse.group/u/fdw)\
**Post date:** [22 April 2026 11:10 UTC](https://pyfr.discourse.group/t/running-h100-gpus/1357/4 "2026-04-22T11:10:40Z")

</div>

Can you confirm that nvrtc is from the exact same version?

Regards, Freddie.