# Reactant cannot find GPU device

**URL:** <https://discourse.julialang.org/t/reactant-cannot-find-gpu-device/127124>\
**Category:** Machine Learning\
**Tags:** question, reactant\
**Created:** [March 19, 2025, 8:14am UTC](https://discourse.julialang.org/t/reactant-cannot-find-gpu-device/127124 "2025-03-19T08:14:15Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tomas\_Pevny](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tomas_pevny/32/25466_2.png) [@Tomas\_Pevny](https://discourse.julialang.org/u/Tomas_Pevny)\
**Post date:** [March 19, 2025, 8:14am UTC](https://discourse.julialang.org/t/reactant-cannot-find-gpu-device/127124/1 "2025-03-19T08:14:15Z")

</div>

I have an old server with two GPUs (TITAN Xp, and RTX 2080). I am using that mostly for developing an playing.  
Now, I wanted to compare the speed of Lux with CUDA and with Reactant, but the reactant library cannot find the GPU. I am receiving this error

```julia
julia> using Reactant

julia> Reactant.devices()
AssertionError("Could not find registered platform with name: \"cuda\". Available platform names are: ")
1-element Vector{Reactant.XLA.PJRT.Device}:
 Reactant.XLA.PJRT.Device(Ptr{Nothing} @0x00000000030f2410, "CPU:0 cpu")

```

Does anyone experienced something similar? Do I have to install something special?

Thanks for help in advance.

> **Version info and libs**
>
> julia\> versioninfo()  
> Julia Version 1.11.4  
> Commit 8561cc3d68d (2025-03-10 11:36 UTC)  
> Build Info:  
> Official [https://julialang.org/](https://julialang.org/) release  
> Platform Info:  
> OS: Linux (x86\_64-linux-gnu)  
> CPU: 16 × AMD Ryzen Threadripper 1900X 8-Core Processor  
> WORD\_SIZE: 64  
> LLVM: libLLVM-16.0.6 (ORCJIT, znver1)  
> Threads: 1 default, 0 interactive, 1 GC (on 16 virtual cores)
> 
> (tmp) pkg\> st  
> Status `~/tmp/Project.toml`  
> [052768ef] CUDA v5.7.0  
> [b2108857] Lux v1.9.0  
> [d0bbae9a] LuxCUDA v0.3.3  
> [eb30cadb] MLDatasets v0.7.18  
> [f1d291b0] MLUtils v0.4.7  
> [0b1bfda6] OneHotArrays v0.2.6  
> [3bd65402] Optimisers v0.4.5  
> [3c362404] Reactant v0.2.45  
> [e88e6eb3] Zygote v0.7.4

---

<div class="post-metadata">

**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [March 19, 2025, 9:11am UTC](https://discourse.julialang.org/t/reactant-cannot-find-gpu-device/127124/2 "2025-03-19T09:11:31Z")

</div>

> **[Configuration | Reactant.jl](https://enzymead.github.io/Reactant.jl/stable/introduction/configuration#Reactant-with-GPU)**
>
> Documentation for Reactant.jl

---

<div class="post-metadata">

**Author:** ![Tomas\_Pevny](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tomas_pevny/32/25466_2.png) [@Tomas\_Pevny](https://discourse.julialang.org/u/Tomas_Pevny)\
**Post date:** [March 19, 2025, 8:09pm UTC](https://discourse.julialang.org/t/reactant-cannot-find-gpu-device/127124/3 "2025-03-19T20:09:02Z")

</div>

Thanks a lot. It seems like I have very old CUDA driver, which is calling for an update.