diff --git a/rpcs3/Emu/RSX/D3D12/D3D12GSRender.cpp b/rpcs3/Emu/RSX/D3D12/D3D12GSRender.cpp
index 129b860610..c05efe7d1f 100644
--- a/rpcs3/Emu/RSX/D3D12/D3D12GSRender.cpp
+++ b/rpcs3/Emu/RSX/D3D12/D3D12GSRender.cpp
@@ -241,8 +241,8 @@ D3D12GSRender::D3D12GSRender()
 	m_rtts.Init(m_device.Get());
 
 	m_constantsData.Init(m_device.Get(), 1024 * 1024 * 64, D3D12_HEAP_TYPE_UPLOAD, D3D12_HEAP_FLAG_NONE);
-	m_vertexIndexData.Init(m_device.Get(), 1024 * 1024 * 384, D3D12_HEAP_TYPE_UPLOAD, D3D12_HEAP_FLAG_NONE);
-	m_textureUploadData.Init(m_device.Get(), 1024 * 1024 * 256, D3D12_HEAP_TYPE_UPLOAD, D3D12_HEAP_FLAG_NONE);
+	m_vertexIndexData.Init(m_device.Get(), 1024 * 1024 * 256, D3D12_HEAP_TYPE_UPLOAD, D3D12_HEAP_FLAG_NONE);
+	m_textureUploadData.Init(m_device.Get(), 1024 * 1024 * 512, D3D12_HEAP_TYPE_UPLOAD, D3D12_HEAP_FLAG_NONE);
 
 	if (Ini.GSOverlay.GetValue())
 		InitD2DStructures();
diff --git a/rpcs3/Emu/RSX/D3D12/D3D12GSRender.h b/rpcs3/Emu/RSX/D3D12/D3D12GSRender.h
index bfdb0ae0e9..952f1ee81d 100644
--- a/rpcs3/Emu/RSX/D3D12/D3D12GSRender.h
+++ b/rpcs3/Emu/RSX/D3D12/D3D12GSRender.h
@@ -412,7 +412,7 @@ private:
 	// Constants storage
 	DataHeap<ID3D12Resource, 256> m_constantsData;
 	// Vertex storage
-	DataHeap<ID3D12Resource, 65536> m_vertexIndexData;
+	DataHeap<ID3D12Resource, 256> m_vertexIndexData;
 	// Texture storage
 	DataHeap<ID3D12Resource, 65536> m_textureUploadData;
 	DataHeap<ID3D12Heap, 65536> m_UAVHeap;