diff --git a/lib/gpu/Makefile.linux_multi b/lib/gpu/Makefile.linux_multi
index 27b0bac77c..d47f87e871 100644
--- a/lib/gpu/Makefile.linux_multi
+++ b/lib/gpu/Makefile.linux_multi
@@ -13,13 +13,23 @@ endif
 
 NVCC = nvcc
 
-# Kepler CUDA
-#CUDA_ARCH = -arch=sm_35
-# newer CUDA
+# obsolete hardware. not supported by current drivers anymore.
 #CUDA_ARCH = -arch=sm_13
-# older CUDA
 #CUDA_ARCH = -arch=sm_10 -DCUDA_PRE_THREE
+
+# Fermi hardware
+#CUDA_ARCH = -arch=sm_20
+#CUDA_ARCH = -arch=sm_21
+
+# Kepler hardware
+#CUDA_ARCH = -arch=sm_30
+#CUDA_ARCH = -arch=sm_32
+#CUDA_ARCH = -arch=sm_35
+#CUDA_ARCH = -arch=sm_37
+
+# Maxwell hardware
 CUDA_ARCH = -arch=sm_50
+#CUDA_ARCH = -arch=sm_52
 
 CUDA_CODE = -gencode arch=compute_50,code=[sm_50,compute_50] -gencode arch=compute_52,code=[sm_52,compute_52] \
 	    -gencode arch=compute_60,code=[sm_60,compute_60] -gencode arch=compute_61,code=[sm_61,compute_61] \