diff --git a/rpcs3/Emu/RSX/D3D12/D3D12Buffer.cpp b/rpcs3/Emu/RSX/D3D12/D3D12Buffer.cpp
index d37597156a..16555d5425 100644
--- a/rpcs3/Emu/RSX/D3D12/D3D12Buffer.cpp
+++ b/rpcs3/Emu/RSX/D3D12/D3D12Buffer.cpp
@@ -409,17 +409,17 @@ void D3D12GSRender::setScaleOffset()
 	};
 
 	// Scale
-	scaleOffsetMat[0] *= (float&)methodRegisters[NV4097_SET_VIEWPORT_SCALE + (0x4 * 0)] / (RSXThread::m_width / RSXThread::m_width_scale);
-	scaleOffsetMat[5] *= (float&)methodRegisters[NV4097_SET_VIEWPORT_SCALE + (0x4 * 1)] / (RSXThread::m_height / RSXThread::m_height_scale);
+	scaleOffsetMat[0] *= (float&)methodRegisters[NV4097_SET_VIEWPORT_SCALE + (0x4 * 0)] / (m_surface_clip_w / 2.f);
+	scaleOffsetMat[5] *= (float&)methodRegisters[NV4097_SET_VIEWPORT_SCALE + (0x4 * 1)] / (m_surface_clip_h / 2.f);
 	scaleOffsetMat[10] = (float&)methodRegisters[NV4097_SET_VIEWPORT_SCALE + (0x4 * 2)];
 
 	// Offset
-	scaleOffsetMat[3] = (float&)methodRegisters[NV4097_SET_VIEWPORT_OFFSET + (0x4 * 0)] - (RSXThread::m_width / RSXThread::m_width_scale);
-	scaleOffsetMat[7] = -((float&)methodRegisters[NV4097_SET_VIEWPORT_OFFSET + (0x4 * 1)] - (RSXThread::m_height / RSXThread::m_height_scale));
+	scaleOffsetMat[3] = (float&)methodRegisters[NV4097_SET_VIEWPORT_OFFSET + (0x4 * 0)] - (m_surface_clip_w / 2.f);
+	scaleOffsetMat[7] = -((float&)methodRegisters[NV4097_SET_VIEWPORT_OFFSET + (0x4 * 1)] - (m_surface_clip_h / 2.f));
 	scaleOffsetMat[11] = (float&)methodRegisters[NV4097_SET_VIEWPORT_OFFSET + (0x4 * 2)];
 
-	scaleOffsetMat[3] /= RSXThread::m_width / RSXThread::m_width_scale;
-	scaleOffsetMat[7] /= RSXThread::m_height / RSXThread::m_height_scale;
+	scaleOffsetMat[3] /= m_surface_clip_w / 2.f;
+	scaleOffsetMat[7] /= m_surface_clip_h / 2.f;
 
 	assert(m_constantsData.canAlloc(256));
 	size_t heapOffset = m_constantsData.alloc(256);