diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -3303,7 +3303,7 @@
     HIPActionBuilder(Compilation &C, DerivedArgList &Args,
                      const Driver::InputList &Inputs)
         : CudaActionBuilderBase(C, Args, Inputs, Action::OFK_HIP) {
-      DefaultCudaArch = CudaArch::GFX803;
+      DefaultCudaArch = CudaArch::GFX906;
       if (Args.hasArg(options::OPT_gpu_bundle_output,
                       options::OPT_no_gpu_bundle_output))
         BundleOutput = Args.hasFlag(options::OPT_gpu_bundle_output,
diff --git a/clang/test/Driver/cuda-flush-denormals-to-zero.cu b/clang/test/Driver/cuda-flush-denormals-to-zero.cu
--- a/clang/test/Driver/cuda-flush-denormals-to-zero.cu
+++ b/clang/test/Driver/cuda-flush-denormals-to-zero.cu
@@ -25,9 +25,10 @@
 // Test the default changing with no argument based on the subtarget in HIP mode
 // RUN: %clang -x hip -### --target=x86_64-linux-gnu -c -march=haswell --cuda-gpu-arch=gfx803 -nocudainc -nogpulib %s 2>&1 | FileCheck -check-prefix=FTZ %s
 // RUN: %clang -x hip -### --target=x86_64-linux-gnu -c -march=haswell --cuda-gpu-arch=gfx900 -nocudainc -nogpulib %s 2>&1 | FileCheck -check-prefix=NOFTZ %s
+// RUN: %clang -x hip -### --target=x86_64-linux-gnu -c -march=haswell --cuda-gpu-arch=gfx906 -nocudainc -nogpulib %s 2>&1 | FileCheck -check-prefix=NOFTZ %s
 
-// Test no subtarget, which should get the denormal setting of the default gfx803
-// RUN: %clang -x hip -### --target=x86_64-linux-gnu -c -march=haswell -nocudainc -nogpulib %s 2>&1 | FileCheck -check-prefix=FTZ %s
+// Test no subtarget, which should get the denormal setting of the default gfx906
+// RUN: %clang -x hip -### --target=x86_64-linux-gnu -c -march=haswell -nocudainc -nogpulib %s 2>&1 | FileCheck -check-prefix=NOFTZ %s
 
 // Test multiple offload archs with different defaults.
 // RUN: %clang -x hip -### --target=x86_64-linux-gnu -c -march=haswell --cuda-gpu-arch=gfx803 --cuda-gpu-arch=gfx900 -nocudainc -nogpulib %s 2>&1 | FileCheck -check-prefix=MIXED-DEFAULT-MODE %s
diff --git a/clang/test/Driver/hip-default-gpu-arch.hip b/clang/test/Driver/hip-default-gpu-arch.hip
--- a/clang/test/Driver/hip-default-gpu-arch.hip
+++ b/clang/test/Driver/hip-default-gpu-arch.hip
@@ -3,4 +3,4 @@
 
 // RUN: %clang -### -c %s 2>&1 | FileCheck %s
 
-// CHECK: {{.*}}clang{{.*}}"-target-cpu" "gfx803"
+// CHECK: {{.*}}clang{{.*}}"-target-cpu" "gfx906"