Hi,
Thank you for your post.
Please let us know how you found that it’s not maximum performance of the graphics card when playing PES 2009.
Regarding the performance, it is mainly related to the hardware and it driver. If the driver is not stable or effective, the performance may be also lower than expected. Therefore, please keep monitoring ATI site and see if there will be a new driver to enhance the performance. Or, you can contact AMD regarding this issue. This may be also helpful on their driver developing.
Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
Thanks.
Nicholas Li - MSFT