diff --git a/python/sglang/srt/server_args.py b/python/sglang/srt/server_args.py
index 12823b5ab..d7feb50d2 100644
--- a/python/sglang/srt/server_args.py
+++ b/python/sglang/srt/server_args.py
@@ -28,6 +28,7 @@ from sglang.srt.utils import (
     configure_ipv6,
     get_device,
     get_device_memory_capacity,
+    is_cuda,
     is_flashinfer_available,
     is_hip,
     is_port_available,
@@ -261,7 +262,7 @@ class ServerArgs:
                     self.mem_fraction_static = 0.88
             else:
                 self.mem_fraction_static = 0.88
-            if gpu_mem is not None and gpu_mem > 180 * 1000:
+            if gpu_mem is not None and gpu_mem > 180 * 1000 and is_cuda():
                 self.mem_fraction_static = 0.79
             elif gpu_mem is not None and gpu_mem > 96 * 1024:
                 mem_fraction = self.mem_fraction_static