AMD FirePro M3900 is detected as Radeon HD 6400M/7400M?

Hi, All

I am pretty new to the AMD video card related stuffs in opensuse. I installed 13.1 onto a hp 8460w laptop and installed latest AMD driver from fglrx repository. But after reboot, the system show video card as Radeon HD 6400M/7400M series.

01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] [1002:6760]

Plus in “top”, the Xorg has no less than 19% CPU usage pretty much all the time, even I donot run any video intensive tasks.

BTW, I do not run and KDE4 desktop effects.

Any suggestions?