diff --git a/dxvk.conf b/dxvk.conf
index 3e739704b..46edbb9c0 100644
--- a/dxvk.conf
+++ b/dxvk.conf
@@ -515,7 +515,9 @@
 
 # Support DF formats
 #
-# Support the vendor extension DF floating point depth formats
+# Support the vendor extension DF floating point depth formats on AMD and Intel.
+# Note that this config is ignored and disabled by default on Nvidia, or when
+# spoofing a Nvidia GPU, as it does not support these formats natively.
 #
 # Supported values:
 # - True/False
diff --git a/src/d3d9/d3d9_format.cpp b/src/d3d9/d3d9_format.cpp
index 87431a874..31ce7290b 100644
--- a/src/d3d9/d3d9_format.cpp
+++ b/src/d3d9/d3d9_format.cpp
@@ -438,7 +438,11 @@ namespace dxvk {
   D3D9VkFormatTable::D3D9VkFormatTable(
     const Rc<DxvkAdapter>& adapter,
     const D3D9Options&     options) {
-    m_dfSupport = options.supportDFFormats;
+
+    const auto& props = adapter->deviceProperties();
+    uint32_t vendorId  = options.customVendorId == -1 ? props.vendorID : uint32_t(options.customVendorId);
+
+    m_dfSupport = options.supportDFFormats && DxvkGpuVendor(vendorId) != DxvkGpuVendor::Nvidia;
     m_x4r4g4b4Support = options.supportX4R4G4B4;
     m_d32supportFinal = options.supportD32;