well... technically speaking I suppose you could desolder the clock crystal that is on it (if there is one) and then soler on a new one... of course you would then need to to pull any ROM chips on the card and reprogram them to accept data at the new clock speed.... and then you might even have to re-code the driver so windows gets the data correctly... Then again I could be pulling all of this out of my @SS... pretty sure it is the latter... yep.. definitely
Of course why you would want to bother with all that on a piece of silicon that cost $5 is beyond me....