strage behavior on different GPUs with direct3d9

I am a little bit confused, because I have ever assigned DIRECT3D_VERSION, which is $900. Also in all my books and samples $900 is used...Budman's dxdriver also use it.

But the DX reference says really there must be D3D_SDK_VERSION assiged, which is 32 on my installation...

Create an IDirect3D9 object as shown here:

LPDIRECT3D9 g_pD3D = NULL;
    
if( NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)))
    return E_FAIL;

/*==========================================================================;
 *
 *  Copyright (C) Microsoft Corporation.  All Rights Reserved.
 *
 *  File:   d3d9.h
 *  Content:    Direct3D include file
 *
 ****************************************************************************/

#ifndef _D3D9_H_
#define _D3D9_H_

#ifndef DIRECT3D_VERSION
#define DIRECT3D_VERSION         0x0900
#endif  //DIRECT3D_VERSION

// include this file content only if compiling for DX9 interfaces
#if(DIRECT3D_VERSION >= 0x0900)
/*
...
*/
#ifdef D3D_DEBUG_INFO
#define D3D_SDK_VERSION   (32 | 0x80000000)
#define D3D9b_SDK_VERSION (31 | 0x80000000)

#else
#define D3D_SDK_VERSION   32
#define D3D9b_SDK_VERSION 31
#endif