I recently bought this card: xfx 250 gts

The gpu says: 680mhz
the memory: 2000mhz

but the nvidia site says that the 250 gts video card is designed at:

gpu: 738mhz
memory: 2200mhz

Is it underclocked by factory?

if so, what's the reason to underclocked it?
can i set it to original design: 738 and 2200mhz without adding more ventilation or without hurting it?

I see no sense to see that card underclocked, unless they have included fewer quality components that can only handle a gpu at: 680mhz and a memory at: 2200 mhz.


please help me on this.
gracias