diff --git a/symforce/caspar/source/templates/buildfiles/CMakeLists.txt.jinja b/symforce/caspar/source/templates/buildfiles/CMakeLists.txt.jinja
index c7b1c6eb..1f89d62c 100644
--- a/symforce/caspar/source/templates/buildfiles/CMakeLists.txt.jinja
+++ b/symforce/caspar/source/templates/buildfiles/CMakeLists.txt.jinja
@@ -10,9 +10,11 @@ endif()
 
 project(caspar_library LANGUAGES CXX CUDA)
 
+set(CASPAR_MIN_ARCH 75 CACHE INTERNAL "Minimum CUDA arch required by Caspar")
+
 # SASS for Turing/Ampere/Ada (sm_75–89) + PTX fallback for forward JIT-compatibility. sm_75 minimum required by cooperative_groups::reduce.
 if(NOT DEFINED CMAKE_CUDA_ARCHITECTURES)
-  set(CMAKE_CUDA_ARCHITECTURES 75 80 86 89 75-virtual)
+  set(CMAKE_CUDA_ARCHITECTURES ${CASPAR_MIN_ARCH} 80-real 86-real 89-real)
 endif()
 
 find_package(CUDAToolkit REQUIRED)