Originally Posted by Tucker
although, if you do want to do this, make sure that your board can support x16/x16, or even x16/x8, but not x8/x8 because if you put that card in there, it will slow your other card down to let the physx card work.
A Physx card works well even in a x4 slot. See chart below.
Even if the main card needs to go down from x16 to x8, the performance loss is about 2% only while the performance gain due to the assistance of a dedicated Physx card (when playing a Physx game, of course) is much more than 2%. So, the loss is more than compensated by the benefit brought.
But fortunately, OP's GIGABYTE GA-990FXA-UD7 does not need to make such a consideration at all.
IMHO, I would not suggest OP to actually go out and spend real cash to buy a card just for Physx purpose unless:-
a) his wallet is getting too thick to be comfortably put in his jean's back pocket or
b) the few number of Physx games (eg Batman series) are really really his type of games
Of course, the ideal situation is using an existing old card which is collecting dust in a closet.Edited by windfire - 10/26/11 at 6:32pm